\f§>NEWS Federal Communications Commission 1919 . M Street N.W. Washington, D. C. 20554 This is 1n untffici1l 1nnnnce .. ut of co .. 11ission 1ction. R1lu11 of the hdl 11Xl of 1 Commission onlar constitWtlS official ntian. Su MCI v, FCC. 515 F 211 385 (D.C. Cin: 19741. News media Information 202 / 418·0500 Recorded listing of release and texts 202 f 418·1222 72687 March 13, 1997 FCC RELEASES INFRASTRUCTURE REPORT The FCC has released a report entitled "Infrastructure of the Local Operating · Companies Aggregated to the Holding Company Level." This report presents data that highlights the development of switching and transmission technologies in the local telephone networks over the period 1991through1995. Included in the report is data on equal access, signalling system 7, Integrated Switched Digital Network (ISDN) capability, and touch tone capability, as well as fiber optic and copper facilities. This report is available in the reference room maintained by the Common Carrier Bureau at 2000 M Street, N.W., Room 575. Copies may be purchased by calling International Transcription Service, Inc. (ITS) at (202) 857-3800. The report can also be downloaded [file name INFRA95.ZIP] from the FCC-State Link internet site, which can be reached through a link from the Common Carrier Bureau home page (http://www.fcc.gov/ccb/) on the World Wide Web. The report can also be downloaded from the FCC-State Link computer bulletin board at (202) 418-0241. -FCC- For further information, contact Jonathan Kraushaar at (202) 418-0947 or (202) 418-0940. INFRASTRUCTURE OF THE LOCAL OPERATING COMPANIES AGGREGATED TO THE HOLDING COMPANY LEVEL 1991 - 1995 By Jonathan M. Kraushaar Industry Analysis Division Common Carrier Bureau Federal Communications Commission This report is available for reference in the Common Cartier Bureau Public Reference Room at 2000 M Street, N.W., Room 575. Copies may be purchased by calling International Transcription Services, Inc. at (202) 857-3800. The report can also be downloaded from the FCC-State Link computer bulletin board [BBS file name: INFRA95.ZIP] directly at (202) 418-0241 or from the FCC-State Link internet site, which can be reached vfa a link from the Common Carrier Bureau home page (http://www.fcc.gov/ccb/) on the World Wide Web. •' Infrastructure of the Local Operating Companies Aggregated to the Holding Company Level 1991 - 1995 Introduction The infrastructure information contained in this report is based upon data collected by the FCC as part of the price-cap monitoring procedures set up in CC Docket No. 87-313. This summary is intended to highlight underlying changes in the use of technology in the local telephone company plant. The raw data (ARMIS 43-07 reports 1 ) upon which this infrastructure summary is based are filed at the end of June for the previous calendar year. The infrastructure report was first released in April 1994 and covered data from 1989 through 1993. This update extends the data series through 1995 using data that were filed in June 1996. 2 1 ARMIS, an acronym for Automated Reporting Management Information System, is a repository of financial, plant, demand, and quality of service data needed to administer various provisions of the Commission's Rules. Additional infrastructure data are contained in the ARMIS 43-08 report. See Statistics of Communications Common .Carriers, published annually by the FCC (Industry Analysis Division) for a compilation of 43-08 infrastructure data. 2 See Infrastructure of the Local Operating Companies Aggregated to the Holding Company Level, released April 24, 1994. The current summary report and this initial report are available from our internet site (http://www.fcc.gov/ccb/) by selecting a link to the FCC-State Link web page. The files are contained in the infrastructure section under the file names INFRA95. ZIP and INFRA93. ZIP, respectively. The raw data upon which the reports are based and the actual summary reports are also available on our dial-up FCC-State Link bulletin board at (202) 418-0241. Raw data are contained on the BBS in a directory entitled ARMIS4307, and a spreadsheet template viewer file IVIEW2.ZIP can be downloaded to facilitate viewing the raw ascii data files. Instructions for using the viewers are contained in a readme.txt file within the "zip" archive. This "zip" file contains two infrastructure data viewers, an executable program for translating the raw data files into ascii output files with full annotations and data labels, and a second spreadsheet template for achieving the same goal by adding the annotations to the data using a spreadsheet template. 1 Background The data items presented here summarize ARMIS Report 43-07; which is filed by local exchange carriers subject to mandatory price cap regulation. The information reported here is for the years 1991 through 1995. The ARMIS 43-07 reports are filed only by those local exchange companies originally subject to mandatory price cap regulation--the Bell Operating Companies (BOCs) and the telephone operating companies owned by GTE. 3 Together, these large companies provide service to more than 90 % of the nation's telephone lines. The data are generally filed at the "study area" level, which typically consists of a company's operations within a state. The state­ by-state data, including, in some cases, disaggregation into Metropolitan Statistical Area (MSA) and non-MSA detail, are available from the FCC-State Link electronic bulletin board. The information summarized in this report is organized into two sets of tables: Tables l(a) to lO(a) show switching system data and gross capital expenditures covering all types of plant. Tables 1 (b) to 1 O(b) show transmission system data. Each table contains segments for each of the seven regional Bell companies, one for the companies owned by GTE, and two that summarize data for the BOCs and all reporting companies. The data summarized for each holding company reflect the aggregate of data filed for individual states or study areas and should be useful in assessing overall trends. The data have been aggregated where region-wide or company-wide composites were not filed. Many of the company composites have been recalculated to provide greater consistency in the data aggregation or roll-up process. A number of obvious discrepancies in the calculation of totals were corrected and may account for small differences between company-filed totals and the ones presented here. Most of these discrepancies were identified as being associated with cumulative effects of rounding, typically associated with data presented in thousands. Some of the data originally filed by the companies contained errors, particularly in the earlier years. A number of the obvious errors have been corrected by subsequent refiling, but cautii:Jn should be 3 See Policy and Rules Concerning Rates for Dominant Carriers, CC Docket No. 87-313, 5 FCC Red 6786 (1990) (LEC Price Cap Order)., Erratum, 5 FCC Red 7664 (1990), and 8 FCC Red 7474 (1993). 2 observed because errors may still be present. In some cases, refiled data may cause values to differ from prior summary reports. Totals associated with GTE and Conte! entities have been aggregated into a single GTE composite. 4 The infrastructure data items received in the ARMIS 43-07 reports are described in Appendix A. Several companies have filed one or more corrected submissions. The raw-data submission numbers of carrier filings used to compile this report are shown in Appendix B. Description of the Technologies and Analysis of the Data The data in the attached tables provide a historical series for a variety of plant elements that illustrate the deployment of technology in the networks of the major local exchange carriers. The data items provide a picture of the key technologies presently in use. For example, although the issue of fiber in the local loop has gained a great deal of attention because of its potential for facilitating development of wideband video services, the progression oflower data­ rate digital technologies to greater numbers of customers through an increased use of digital local access has been occurring for some time now. Both switching and transmission technology provide the building blocks that make this possible. In the switch, Signalling System 7 (SS7) provides a means for networks and interoffice switches to communicate with each other. This system uses separate digital links outside the voice channel to accomplish this. Other elements in the data relating to equal access switches and touchctone capable switches show that most switches now support equal access and that nearly all switches are equipped for touch-tone dialing. A useful overall measure of company activity is gross capital expenditures, which increased .about 5 % for the BOCs in 1995. The data reported include all capital expenditures on both switching and transmission facilities. Gross capital expenditures tends to correspond closely with the overall access line growth. Bell Atlantic, NYNEX, and US West are the only 4 The following data items were adjusted by the author based on information conveyed verbally by the companies or deduced from other information: 1991 DS-3 terminations on customer premise fiber for NYNEX and Pacific Telesis; 1994 radio links for SBC (Southwestern Bell). These adjustments are reflected in the industry composites. BellSouth reports that fluctuations in its DS-3 customer terminations on fiber data are due to errors and adjustments in its database associated with rapid growth. SBC reports that it changed its reporting procedures for its ISDN basic rate interfaces equipped and ISDN access line capacity data. Beginning in 1993, it only reported ISDN access lines associated with ISDN switches. Prior to 1993, it had reported the number of ISDN lines available in wire centers where at least one switch was ISDN equipped. Beginning in 1994, SBC only reported equipped or filled ISDN. basic rate interface slots. Prior to 1994, it had reported all available slots. 3 companies where capital expenditure growth .exceeded access line growth in 1995. Capital expenditure levels should continue to be an important overall parameter in assessing deployment of new technology in the local service business and its relationship to future service quality levels. SBC Communications (Southwestern Bell) and GTE reported the only appreciable net gains in switching entities during 1995 with about 9% and 2 % increases, respectively, and have significantly increased the number of Integrated Services Digital Network (ISDN) capable switches. Other companies experienced no net gain in switches during 1995. Except for SBC, the number of access lines per switching entity increased in 1995 over 1994. Pacific Telesis now supports more than 18,000 access lines per switching entity on average, the largest number shown. Data for other companies typically fall in the range of 9,000 to 14,000 access lines per switching entity. Although there is considerable interest in digital switching, the term "digital switch" by itself is often misleading and does not address the important issues of switching capability and modularity. For example, while most network switches are presently classified as digital stored program controlled switches, this classification by itself does not indicate whether the switch has ISDN or SS7 capability and does not address the issue of modularity that allows lower-cost expansion. Therefore, measurement of digital switching proliferation requires one to look at more than a single statistic. While there are no across-the-board relationships between modularity and switch capabllity, many of the switches with ISDN capability ii!so tend to be modular in design and can often be upgraded with software that can facilitate lower-cost expansion. Data presently being collected only cover circuit switches that provide a dedicated path through the network for the duration of a call, not routers or statistical switches that are used in internet services that are specifically designed to handle data packets. ISDN technology provides the service protocols and channel designations for digital services to customers and can convey voice, computer data or compressed video. Basic rate ISDN services are provided as two 64-kilobit data channels and one 16-kilobit control channel associated with each basic-rate access line. The control channels allow the transfer of special information between the switch and the customer, unavailable with in-band signalling, as well as advanced network control features presently used in a number of enhanced services. Primary rate ISDN provides the capacity of twenty-three 64-kilobit data channels and one 64-kilobit control channel. Although these services can potentially provide for improved communication between computers, the lack of a critical mass of customers using ISDN was a stumbling block in the early proliferation of end-to-end digital services. Availability of the service is significant and expanding. There are, however, important regional and localized differences in investment and customer demand patterns that may require examination of data at a more localized level than presented here. 5 5 Individual study-area data· are also available to address more localized issues that will become increasingly important in the coming years. This information is available by dial-up 4 In the aggregate there was a 20% increase in the number of BOC ISDN-capable switches in 1995 following a 27% increase in 1994. All companies except US West and NYNEX reported a double-digit percentage gain in ISDN-capable switches in 1995. GTE and SBC reported the largest gains. Although switch capabilities and modularity tend to vary by vendor, these switches tend to be better able to deal with the changing characteristics of telecommunication traffic. 6 The companies typically report the number of access lines that can be connected to ISDN service within each wire center or switch. Bell Atlantic and NYNEX began to report all access lines that can receive ISDN service, even those requiring a foreign exchange link to another wire center. These companies were notified that their method of counting ISDN-capable access lines was inconsistent with the Commission's reporting requirements. NYNEX subsequently refiled its 1995 data, which is reflected in the accompanying tables. 7 Because ISDN is a digital service, it is equipped to handle communication between computers without the need to first convert the signal to an analog form. Early on it was primarily marketed as a medium for enhanced voice services and was primarily targeted to business users. It has become an increasingly attractive alternative for residential customers and small businesses needing a second line for a computer and therefore its pricing in relation to the cost of two analog lines can significantly affect proliferation of the service. Many of the companies had installed digital switches in response to equal access requirements of divestiture. About 99% of the Bell Company switching entities have equal access capability. Although 903 of the BOC switching entities are digital-stored-program-controlled switches, only about 29% have ISDN capability. As of the end of 1995, the companies generally had been responding to increased interest in ISDN service and internet use by replacing or upgrading existing switches for ISDN capability. 8 access described in footnote 2. A new viewer in executable format also described in footnote 2 has been created to further facilitate examination of the raw data files. 6 Continuing changes in demand patterns for new access lines and in the character of telephone traffic from pure voice traffic to a changing mix of voice and data underscore the desirability of targeted improvement to the switching infrastructure. Use of easily upgradeable switching systems will be increasingly important. 7 Company totals have been recalculated to minimize errors in summing raw study-area data. In calculating industry totals, some adjustments may have been made to account for missing or irregular company data and for rounding errors. In certain instances, the classification "other" was used for adjustment purposes so that the respective totals would properly reflect the sum of their components. 8 Increased use of ISDN services for internet access could lead to. a critical mass of residential users that would be mutually beneficial to customers and the companies by driving down ISDN per-unit costs further. While increased business use should continue to be an 5 A number of transmission elements are included in the tables. These illustrate the rapid development of fiber capacity in terms of terminations, sheath-kilometers, and links. The tables also highlight the relative magnitude of equipped and working channels, providing an indication of termination equipment utilization. Declines in the number of analog links can be noted, and for some time the number of interoffice fiber carrier links has significantly exceeded the number of copper carrier links for all companies shown. Although data on links and channels shows that circuits connecting local central offices could typically be provided on only two fibers, the economics of fiber deployment have resulted in deployments of typical fiber cables containing more than 35 fibers. This suggests that there is a significant amount of fiber capacity presently unused in the interoffice transmission plant. 9 Although the overall level of growth in fiber has been high, its use in the local loop is presently relatively small. The BOCs had an installed base of about 185 million copper-pair mainframe terminations in their central offices for local loop use in 1995. About 824,000 BOC fiber terminations had been installed by end-of-year 1995, up 21 % from the prior year. Since fibers are not necessarily in current use and since there is a greater potential for more than one access line to be provided on one fiber than on one copper pair, especially nearer to the central offices, the ultimate number of central office fiber terminations needed to equip all access lines for fiber is expected to be considerably lower than the present number of copper terminations. However, due to the fact that less sharing of transmission facilities is possible in the portion of plant closest to customers, the cost of providing loop capacity nearest to the customer is greatest. Based on these considerations, it is likely that significantly fewer than 824,000 fibers actually terminate on customer premises. Fiber will become increasingly important in the local loop as the number of high-quality copper pairs available to support digital services declines. important revenue source and a driving force leading to improved efficiencies in providing ISDN service, new marketing, pricing and regulatory factors could make ISDN more attractive for residential customers. Competitive activity and interconnection should require incumbent carriers to pay greater attention both to strategic planning and customer service. In the short term, investment, packaging and pricing strategies for ISDN services that consider local and regional issues might facilitate overall service quality improvement by encouraging migration from analog to digital access services, leading to improvement of the switching infrastructure. Next-generation wideband capabilities will become increasingly important in the longer term. 9 A large portion of the cost of fiber deployment is associated with labor and installation rather than with the cable itself. Thus, the incremental cost of installing a larger fiber cable is typically relatively small. This suggests that the sheath-kilometer parameter shown in the attached tables may be a better measure of fiber coverage than fiber kilometers. In general, care should be exercised in interpreting aggregate fiber data when determining, for example, whether fiber is concentrated in certain parts of a company's service area with relatively little fiber elsewhere. See FCC Fiber D~ployment Update" End of Year 1995, released July 19, 1996. 6 Table 1 (a): Ameritech -- Switching System Data 1991 1992 1993 1994 1995 Gross Plant Expenditures 1,877 1,716 1,719 1,517 1,578 (In Millions $) Local Switches 1,421 1,430 1,422 1,413 1,415 Tandem Switches 49 46 47 47 46 Hosts 224 228 230 236 238 Remotes (Stand Alone Only) 654 666 684 717 731 Total Switching Entities 1,438 1,473 1,469 1,460 1,461 Electromechanical 46 0 0 0 0 Analog Stored Pgm. Control 373 318 224 119 97 Digital Stored Pgm. Control 1,019 1, 155 1,245 1,341 1,364 Total Access Lines (000) 16,633 16,886 17,500 18, 123 19,310 Electromechanical Switches 65 6 0 0 0 Analog Stored Pgm ctrl Sw. 9,076 7,892 5,862 3,845 3,727 Digital Stored Pgm ctrl Sw. 7,492 8,988 11,638 14,278 15,583 Touch Tone'Capable Switches 1,394 1,473 1,469 1,460 1,415 T. Tone Capable Access Lines 16,586 16,889 '17,500 18, 122 19,310 Equal Access Switches 1,390 1,470 1,469 1,450 1,461 Equal Access Lines (000) 16,563 16,855 17,500 18, 122 19,310 Signal. Sys 7 Switch (SS7-394) 213 646 1,001 1,254 1,400 SS7-394 Access Lines (000) 4,779 9,216 13,376 16,482 18,538 Signal. Sys 7 Switch (SS7-317) 502 863 1, 116 1,347 1,417 SS7-317 Access Lines (000) 7,662 10,455 13,961 17,217 18,653 ISDN Capable Switches 108 181 387 444 489 ISDN Access Line Capac. (000) 1,738 3,839 8,056 10,259 12,860 ISDN Basic Rate lnterf. Eq'pd 55,890 56,352 67,415 87,862 97,550 ISDN Primary Rate lnterf.Eq'pd 703 728 707 1,505 5,812 Please refer to text for notes and data qualifications 7 Tablet (b): Ameritech •• Transmission System Data 1991 1992 1993 1994 1995 Total Sheath-Kilometers 547,157 552,800 556,814 537,133 562,934 Copper Sheath-Kilometers 522,154 522,374 521, 187 498,238 519,775 Fiber Sheath-Kilometers 24,559 29,468 34,655 37,980 42,370 Other Sheath-Kilometers 444 958 972 915 789 Total Carrier Links 291,734 336,055 452,276 535,085 715,434 Copper Links 92,021 84,444 69,609 55, 193 46,806 Fiber Links 194,437 216,811 377,963 475,981 667,746 Radio Links 5,276 4,800 4,704 3,911 882 Total Circuit Links 2,628,075 2,783,389 2,800,655 2,964,296 3,278,058 Baseband Links 187,964 151,207 59,460 56, 164 56,287 Analog Links 3,295 1,734 468 440 189 Dlgital Links 2,436,816 2,630,448 2,740,727 2,907,692 3,221,582 Equipped Channels 29,845,700 29,831,652 30,818,288 31,847,802 31,957,238 Copper 29,005, 102 28,551,452 29,549,360 29,482,848 29, 124,886 Fiber 840,598. 1,280,200 1,268,928 2,364,952 2,832,350 Other 0 0 0 2 2 Working Channels 19,055,583 19,283,746 18,610,716 19, 105,654 19,714,345 Copper 18,588,688 18,317,812 17,811,512 18,096, 152 18,478,770 Fiber 466,895 965,933 799,203 1,009,500 1,235,575 Other 0 1 1 2 0 Copper Pair Sw. Term.-Loop 28,038,406 28,244,800 28,687,860 28,645,732 28,217,638 Fiber Cent. Ofc. Loop Termin. 31,299 40,664 56,834 66,035 79,661 DS-1 Tel'm.- Cust. Prem. Fiber 13,964 18,905 23,675 26,660 31,941 DS-3 Term.· Cust. Prem. Fiber 1,462 1,871 2,434 2,755 3,192 Please refer to text for notes and data qualifications 8 Table 2 (a): . Bell Atlantic -- Switching System Data 1991 1992 1993 1994 1995 Gross Plant Expenditures 2,353 2, 111 2,133 2,107 2,390 .(In Millions $) Local Switches 1,404 1,416 1,405 1,408 1,406 Tandem Switches 43 42 42 42 42 Hosts 227 203 193 199 202 Remotes (Stand Alone Only) 639 661 666 685 696 Total Switching Entities 1,414 1,432 1,421 1,422 1,420 Electromechanical ·O 0 0 0 o Analog Stored Pgm. Control 267 212 157 123 93 Digital Stored Pgm. Control 1, 147 1,220 1,264 1,299 1,327 Total Access Lines (000) 17,750 18, 180 18,646 19, 167 19,820 Electromechanical Switches 0 0 0 0 0 Analog Stored Pgm Ctrl Sw. 7,974 6,624 5,627 4,753 3,607 Digital Stored Pgm Ctrl Sw. 9,776 11,556 13,019 14,414 16,213 Touch Tone Capable Switches 1,404 1,416 1,405 1,408 1,406 T. Tone Capable Access Lines 17,750 18, 180 18,644 19,167 19,820 Equal Access Switches 1,411 1,432 1,421 1,422 1,420 Equal Acces5 Lines (000) 17,740 18,180 18,644 19, 167 19,820 Signal. Sys 7 Switch (SS7-394) 0 444 720 1,263 1,374 SS7-394 Access Lines (000) 0 7,362 13,240 18, 120 19,709 Signal. Sys 7 Switch (SS7-317) 1, 178 1,306 1,359 1,374 1,373 SS7-317 Access Lines (000) 15,953 17, 182 18,220 19,049 19,780 ISON Capable Switches 332 367 515 580 671 ISON Access Une Capac. (000) 8,514 8,745 9,923 12,022 19,419 ISON Basic Rate lnterf. Eq'pd 16,880 92,654 95,858 153,378 201,361 ISON Primarv Rate lnterf.Ea'pd 7 50 113 5,311 9,185 Please refer to text for notes and data qualifications 9 Table 2 (b): . Bell Atlantic -- Transmission System Data 1991 1992 1993 1994 1995 Total Sheath-Kiiometers 495,980 501,229 507,245 514,377 518,999 Copper Sheath-Kilometers 465,277 462, 151 461,040 461,558 460,772 Fiber Sheath-Kilometers 29,644 38,123 45,402 52,014 57,425 Other Sheath-Kilometers 1,059 955 803 805 802 Total Carrier Links 235,043 243,064 252, 108 278, 199 303,468 Copper Links 77,730 67,892 62, 122 63,297 66, 127 Fiber Links 149,457 167,892 182,816 207,750 230,335 Radio Links 7,856 7,280 7,170 7, 152 7,006 Total Circuit Links 2,441,962 2,513,861 2,550,021 2,604,573 2,766,872 Baseband Links 243,128 146,756 105,941 73,773 42,296 Analog Links o o o o o Digital Links 2,198,834 2,367, 105 2,444,080 2,530,800 2,724,576 Equipped Channels 32,859,604 33,799, 192 44,052,466 45,745,024 56,613,564 Copper 30,977,904 31,304,768 32,594,232 32,385, 128 34,269,368 Fiber 1,881,699 2,494,419 11,458,234 13,359,894 22,344,196 Other 1 5 o 2 o Working Channels 19,527,458 19,749,054 20,859,312 21,356,842 23,514,796 Copper 18,478,872 18,285,784 18,366,516 18,223,592 19,067,568 Fiber 1,048,584 1,463,270 2,492,795 3,133,250 4,447,227 Other 2 o 1 o 1 Copper Pair Sw. Term.-Loop 29,920,518 30,272,652 30,504,710 30,479,864 30,444,726 Fiber Cent. Ofc. Loop Termln. 14, 189 125,719 129,509 168, 147 182,097 DS-1 Term.- Cust. Prem. Fiber 9,103 13,408 25,922 37,197 47,737 DS-3 Term.· Cust. Prem. Fiber 285 234 443 731 970 Please refer to text for notes and data qualifications 10 Table 3 (a): BellSouth -- Switching System Data 1991 1992 1993 1994 1995 Gross Plant Expenditures 2,841 2,925 3,012 3, 118 3,160 (In Millions $) Local Switches 1,666 1,664 1,661 1,658 1,647 Tandem Switches 62 66 ' 70 70 71 Hosts 270 272 269 280 289 Remotes (Stand Alone Only) 696 703 714 732 742 Total Switching Entities 1,680 1,678 1,680 1,677 1,668 Electromechanical 0 0 0 0 0 Analog Stored Pgm. Control 318 283 236 182 158 Digital Stored Pgm. Control 1,362 1,395 1,444 1,495 1,570 Total Access Lines (000) 17,971 18,607 19,233 20, 141 21,064 Electromechanical Switches 0 0 0 0 0 Analog Stored Pgm Ctrl Sw. 7,726 7,173 5,929 4,837 4,455 Digital Stored Pgm Ctrl Sw. 10,245 11,434 13,304 15,304 16,609 Touch Tone Capable Switches 1,666 1,664 1,661 1,658 1,647 T. Tone Capable Access Lines 17,970 18,607 19,233 20, 141 21,064 Equal Access:Switches 1,680 1,678 1,680 1,677 1,668 Equal Access Lines (000) 17,970 18,607 19,233 20, 141 21,064 Signal. Sys 7 Switch (SS7-394) 590 966 1,447 1,627 1,629 SS7-394 Access Lines (OOO) 9,391 14,231 18,067 20,118 20,737 Signal. Sys 7 Switch (SS7-317) 956 1, 121 1,452 1,628 1,630 SS7-317 Access Lines (000) 14,634 15,959 18, 122 20, 136 20,755 ISDN Capable Switches 171 224 324 407 467 ISDN Access Line Capac. (000) 3,321 4,934 7,606 9,708 10,988 ISDN Basic Rate lnterf. Eq'pd 34,613 50,774 65,607 76,348 80,641 ISDN Prlmarv Rate lnterf.Ea'Dd 282 559 1,814 3,534 4,803 Please refer to text for notes and data qualifications 11 Table 3 (b): BellSouth •• Transmission System Data 1991 1992 1993 1994 1995 Total Sheath-Kilometers 966,488 979,751 993,633 1,005,397 980,420 Copper Sheath-Kilometers 916,955 921,509 927,265 930,812 899,685 Fiber Sheath-Kilometers 47,759 56,692 65, 100 73,370 79,014 Other Sheath-Kilometers I 1,774 1,550 1,268 1,215 1,721 Total Carrier Links 567,759 792,341 991,365 1,035,404 1,068,631 Copper Links 81,426 89,264. 86,390 52,813 48,503 Fiber Links 474,939 675,449 877,770 958,357 1,003,735 Radio Links 11,394 27,628 27,205 24,234 16,393 Total Circuit Links 2,459,749 2,702, 141 2,935,064 4,287,654 4,756,430 Baseband Links 59,780 28,095 17,575 14,713 9,985 Analog Links 630 122 99 50 0 Digital Links 2,399,339 2,673,924 2,917,390 4,272,891 4,746,445 Equipped Channels 31,352,184 31,742,418 33,070,338 34,669,704 36,022,280 Copper 28,925,108 28,821,672 29,291, 198 29,995,724 30,351,792 Fiber 2,426,385 2,919,937 3,778,341 4,673,140 5,669,647 other 691 809 799 840 841 Working Channels 19,915,442 20,196,488 21,275,556 23,284,636 24,682,892 Copper 18,002,278 17,874,950 18,288,532 19,283,574 19,871,262 Fiber 1,913, 109 2,321,451 2,9116,937 4,000,986 4,811,550 Other 55 87 87 76 80 Copper Pair Sw. Term.-Loop 26,383,292 26,382,232 26,433,408 26,451,200 26,527,294 Fiber Cent. Ofc. Loop Termin. 44,363 52,591 59,663 73,260 106,710 OS-1 Term.- Cust. Prem. Fiber 2,726 4,681 9,078 13,941 19,132 OS-3 Term .. - Cust. Prem. Fiber 2,918 5,490 3,294 4,034 3,632 Please refer to text tor notes and data qualifications 12 Table 4 (a): NYNEX -- Switching System Data 1991 1992 1993 1994 1995 Gross Plant Expenditures 2,099 2,003 2,152 2,208 2,316 (In Millions $) Local Switches 1,316 1,317 1,307 1,297 1,290 Tandem Switches 29 23 23 23 23 Hosts 137 151 155 125 169 Remotes (Stand Alone Only) 531 668 699 722 728 Total Switching Entitles 1,336 .1,336 1,326 1,316 1,309 Electromechanical 128 0 0 0 0 Analog Stored Pgm. Control 274 251 192 123 101 Dlgital Stored Pgm. Control 934 1,085 1, 134 1,193 1,208 Total Access Lines (000) 15,409 15,699 16, 129 16,578 17, 139 Electromechanical Switches 447 0 0 0 0 Analog Stored Pgm Ctrl Sw. 5,590 5,173 4,123 2,800 1,969 Digital Stored Pgm Ctrl Sw. 9,372 10,526 12,006 13,778 15, 170 Touch Tone Capable Switches 1,229 1,317 1,307 1,297 1,286 T. Tone Capable Access Lines 15,284 15,699 16, 129 16,578 17, 139 Equal Access Switches 1, 167 1,291 1,307 1,316 1,308 Equal Access. Lines (000) 15,093 15,606 16,077 16,578 17, 139 Signal. Sys 7 Switch (SS7-394) 161 739 970 1,119 1,203 SS7-394 Access Lines (000) 3,147 8,457 11,300 13,852 15, 168 Signal. Sys 7 Switch (SS7-317) 430 739 969 1, 119 1,203 SS7-317 Access Lines (000) 4,360 8,457 11,300 13,832 15, 168 ISDN Capable Switches 27 42 114 247 259 ISDN Access Line Capac. (000) 843 1,232 3,483 9,357 11,583 ISDN Basic Rate lnterf. Eq'pd 25,529 39,653 62,522 118, 150 139,694 ISDN Primarv Rate lnterf.Ea'pd 0 251 837 1,082 3,322 Please refer to text tor notes and data qualifications 13 Table 4 (b): NYNEX -- Transmission System Data 1991 . 1992 1993 1994 1995 Total Sheath-Kilometers 443,967 448,417 451,030 452,707 453,951 Copper Sheath-Kilometers 420,342 417,866 416,312 414, 170 412,025 Fiber Sheath-Kilometers 23,625 28,496 33,013 37,118 41,000 Other Sheath-Kiiometers 0 2,055 1,705 1,419 926 Total Carrier Links 371,972 388,726 442;636 459,959 467,055 Copper Links 95,207 76,200 50,392 51,873 45,579 Fiber Links 271,777 308,053 389,124 406,135 420,415 Radio Links 4,988 4,473 3,120 1,951 1,061 Total Circuit Links 2,757,499 . 2,628,803 2,609, 151 2,596,631 2,446,502 Baseband Links 590,617 406,393 310,515 244,437 170,544 Analog Links 197 0 0 0 0 Dlgltal Links 2,166,685 2,222,410 2,298,636 2,352,194 2,275,958 Equipped Channels 30,981, 104 31,948,464 32,786,502 33,221,540 33,494,240 Copper 30,012,852 30,800,664 31,399,860 31,706,560 31,393,668 Fiber 968,252 1, 147,800 1,386,642 1,514,975 2,100,572 Other 0 0 0 5 0 Working Channels 18, 147, 166 18,418,984 18,869,249 18,776,462 20,176, 170 Copper 17,676,516 17,836,040 18, 135,776 17,874,872 18,859,714 Fiber 470,649 582,943 733,473 901,589 1,316,456 Other 1 1 0 1 0 Copper Pair Sw. Term.-Loop 30, 116,462 29,386,450 30,053,156 30,097,348 30,190,920 Fiber Cent. Ofc. Loop Termin. 48,329 88,279 143,770 188, 194 214,587 DS-1 Term.- Cust. Prem. Fiber 8,270 19,682 21,911 28,732 30,529 DS-3 Term.- Cust. Prem. Fiber 260 442 869 1,036 1,363 Please refer to text for notes and data qualifications 14 Table 5 (a): Pacific Telesis -- Switching System Data 1991 1992 1993 1994 1995 Gross Plant Expenditures 1,688 1,625 1,734 1,620 1,664 (In Millions $) Local Switches 842 853 846 837 840 Tandem Switches 20 20 20 20 20 Hosts 102 103 111 121 117 Remotes (Stand Alone Only) 238 253 302 320 316 Total Switching Entities 862 873 866 856 859 Electromechanical 4 3 3 2 1 Analog Stored Pgm. Control 242 218 176 109 87 Digital Stored Pgm. Control 616 652 687 745 771 Total Access Lines (000) 14,381 14,661 14,971 15,384 15,984 Electromechanical Switches 1 1 1 1 0 Analog Stored Pgm Ctrl Sw. 8,557 8,128 7,036 5,029 4,036 Digital Stored Pgm Ctrl Sw. 5,823 6,532 7,934 10,354 11,948 Touch Tone Capable Switches 842 853 846 837 840 T. Tone Capable Access Lines 14,381 14,661 14,971 . 15,384 15,984 Equal Acce5s Switches 832 844 844 834 838 Equal Access Lines (OOO) 14,348 14,630 14,949 15,360 15,966 Signal. Sys 7 Switch (SS7-394) 53 374 522 764 772 SS7-394 Access Lines (000) 1, 161 9,638 12,490 14,781 15,512 Signal. Sys 7 Switch (SS7-317) 253 374 522 764 772 SS7-317 Access Lines (000) 7,190 9,638 12,490 14,781 15,512 ISDN Capable Switches 88 150 229 347 417 ISDN Access Line Capac. (000) 1,567 2,905 5,349 8,494 10,291 ISDN Basic Rate lnterf. Eq'pd 36,246 47,661 65,683 115,146 171,305 ISDN Primary Rate lnterf.Eq'pd 113 308 357 708 3,491 Please refer to text for notes and data qualifications 15 Table 5 (b): Pacific Telesis ., Transmission System Data 1991 1992 1993 1994 1995 Total Sheath-Kiiometers 348,654 351,748 351,695 343,658 346,127 Copper Sheath-Kilometers 335,484 336,461 334,674 324,942 325,537 Fiber Sheath-Kilometers 11,266 13,412 15,814 17,598 19,472 Other Sheath-Kilometers 1,904 1,875 1,207 1, 118 1, 118 Total Carrier Links 1,013,792 839,818 890,851 962,858 1,383,705 Copper Links 439,687 344,924 335,250 153,493 123,014 Fiber Links 565,533 486,811 546,847 801,638 1,252,043 Radio Links 8,572 8,083 8,754 7,727 8,648 Total Circuit Links 2,233,398 2,104,431 2, 137, 179 2,568,706 2,646,904 Baseband Links 118,782 89,606 66,642 42,095 35,016 Analog Links 1,854 710 609 451 256 Digital Links 2,112,762 2,014, 115 2,069,928 2,526,160 2,611,632 Equipped Channels 16,684,591 25,576,496 26,287,308 26,447,356 26,850,298 Copper 16,417,534 25,239,668 25,859,696 25,914,608 26, 178,876 Fiber 266,970 336,737 427,522 532,661 671,162 Other 87 91 90 87 260 Working Channels 15,393, 192 15,624,516 15,840,904 16,110,206 16,877,850 Copper 15,222,339 15,400,695 15,556,249 15,758,760 16,448,199 Fiber 170,776 223,744 284,575 351,364 429,536 Other 77 77 80 82 . 115 Copper Pair Sw. Term.-Loop 23,813,846 24,098,662 24,632,896 24,577,002 24,619,462 Fiber Cent. Ofc. Loop Termln. 31,676 35,565 39,830 33,538 34,692 DS-1 Term.· Cust. Prem. Fiber 570 628 701 756 655 DS-3 Term.· Cust. Prem. Fiber 777 1,710 2,410 3,108 4,047 Please refer to text tor notes and data qualifications 16 Table 6 (a): SBC (Southwestern Bell) -- Switching System Data 1991 1992 1993 1994 1995 Gross Plant Expenditures 1,519 1,835 1,723 1,739 1,759 (In Milllons $) Local Switches 1,356 1,392 1,437 1,511 1,644 Tandem Switches 48 67 64 60 60 Hosts 131 191 230 233 245 Remotes (Stand Alone Only) 311 488 672 779 935 Total Switching Entities 1,380 1,425 1,469 1,539 1,679 Electromechanical 398 222 83 73 58 Analog Stored Pgm. Control 366 348 308 264 252 Digital Stored Pgm. Control 616 855 1,078 1,202 1,369 Total Access Lines (000) 12,357 12,693 13, 180 13,611 14,095 Electromechanical Switches 686 314 102 96 62 Analog Stored Pgm Ctrl Sw. 7,704 7,454 7,078 6,608 6,531 Digital Stored Pgm Ctrl Sw. 3,967 4,925 6,000 6,907 7,502 Touch Tone Capable Switches 1,356 1,392 1,437 1,511 1,644 T. Tone Capable Access Lines 12,357 12,693 13, 180 13,611 14,095 Equal Access Switches 871 1, 119 1,340 1,511 1,644 Equal Access Lines (000) 11,517 12,284 13,060 13,611 -14,095 Signal. Sys 7 Switch (SS7-394) o 607 723 1,263 1,466 SS7-394 Access Lines (OOO) 0 8,116 8,828 12,787 13,289 Signal. Sys 7 Switch (SS7-317) 105 563 649 1,263 1,466 SS7-317 Access Lines (000) 2,332 7,732 8,468 12,787 13,289 ISDN Capable Switches 79 92 92 123 303 ISDN Access Line Capac. (000) 981 1,963 1,476 1,933 8,826 ISDN Basic Rate lnterf. Eq'pd 47,230 88,960 88,960 57,041 108,784 ISDN Primary Rate lntert.Eq'pd 161 380 410 1,238 5,084 Please refer to text for notes and data qualifications 17 Table 6 (b):. SBC (Southwestern Bell) -- Transmission System Data 1991 1992 1993 1994 1995 Total Sheath-Kilometers 631,229 637,841 646,283 652,224 662,108 Copper Sheath-Kilometers 603,323 605,825 608,238 609,725 612,764 Fiber Sheath-Kilometers 24,226 28,406 35,548 40,621 47,530 Other Sheath-Kilometers 3,680 3,610 2,497 1,878 1,814 Total Carrier Links 409,041 539,611 519,243 717,489 1, 116,226 Copper Links 136,055 106,744 109,423 119,709 120,615 Fiber Links 254,978 419,710 394,948 584,519 982,517 Radio Links 18,008 13, 157 14,872 13,261 13,094 Total Circuit Links 1,812,234 2,028,241 2,132,469 2,271,891 2,583,685 Baseband Links 68,676 50,622 42,930 32,798 26,474 Analog Links 14,371 6,676 2,080 827 97 Digital Links 1,729, 187 1,970,943 2,087,459 2,238,266 2,557, 114 Equipped Channels 22,805,216 23,280,470 22,801,616 23,675,324 23,990,229 Copper 22,387,044 22,835,410 21,895,338 22,010,812 23,356,682 Fiber 414,723 444,970 906,188 1,664,422 633,547 Other 3,449 90 90 90 o Working Channels 12,924,549 13,400,320 13,431,477 15,446,486 15,917,610 ·copper 12,595,246 13,047,301 12,703,861 14,046,786 15,376,311 Fiber 327,985 352,945 727,542 1,399,626 541,299 Other 1,318 74 74 74 o Copper Pair Sw. Term.-Loop 21,723,564 22,047,874 21,379,496 22,010,904 21,990,828 Fiber Cent. Ofc. Loop Termln. 37,827 41,947 56,560 66,497 124,026 DS-1 Term.- Cust. Prem. Fiber 28,216 33, 162 38,568 44,622 48,552 DS-3 Term.- Cust. Prem. Fiber 1,338 1,612 1,916 2,566 2,733 Please refer to text for notes and data qualifications 18 Table 7 (a): US West -- Switching System Data 1991 1992 1993 1994 1995 Gross Plant Expenditures 2,126 2,413 2,210 2,359 2,570 (In Millions $) Local Switches 1,824 1,833 1,834 1,737 1,641 Tandem Switches 53 51 52 52 51 Hosts 172 195 223 232 238 Remotes (Stand Alone Only) 515 692 880 984 961 Total Switching Entities 1,847 1,852 1,852 1,751 1,654 Electromechanical 572 390 205 20 1 Analog Stored Pgm. Control 327 294 261 213 188 Digital Stored Pgm. Control 948 1, 168 1,386 1,518 1,465 Total Access Lines (000) 12,886 13,268 13,710 14,309 14,817 Electromechanical Switches 677 396 161 18 1 Analog Stored Pgm Ctrl Sw. 6,823 6,508 6,257 5,303 4,706 Digital Stored Pgm Ctrl Sw. 5,386 6,364 7,292 8,988 10, 110 Touch Tone Capable Switches 1,824 1,833 1,834 1,735 1,641 T. Tone Capable Access Lines 12,886 13,268 13,710 14,267 14,817 Equal Access Switches 1,250 1,458 1,636 1,723 1,638 Equal Access Lines (000) 12, 182 12,844 13,529 14,287 14,816 Signal. Sys 7 Switch (SS7·394) 231 470 620 819 1, 116 SS7-394 Access Lines (000) 4,899 7,623 9,931 11,685 13,411 Signal. Sys 7 Switch (SS7·317) 246 471 621 839 1, 116 SS7-317 Access Lines (000) 5,196 7,679 9,931 11,783 13,411 ISDN Capable Switches 115 163 213 240 262 ISDN Access Line Capac. (000) 3,603 4,757 3,982 5,045 6,192 ISDN Basic Rate lnterf. Eq'pd 72,904. 92,613 108,775 120,058 126,530 ISDN Primary Rate lnterf.Ea'pd 387 396 674 742 2,315 Please refer to text for notes and data qualifications 19 Table 7 (b): . US West •• Transmission System Data 1991 1992 1993 1994 1995 Total Sheath-Kilometers 727,799 743,027 757,869 750,757 753,942 Copper Sheath-Kilometers 692,087 699,219 707,384 694,797 691,844 Fiber Sheath-Kilometers 35,712 43,808 50,485 55,960 62,098 Other Sheath-Kilometers 0 0 0 0 0 Total Carrier Links 394,615 430,532 471,975 505,550 633,861 Copper Links 126,419 99,584 89,849 73,050 35,964 Fiber Links 242,922 305,459 357,269 409,034 575,849 Radio Links 25,274 25,489 24,857 23,466 22,048 Total Circuit Links 2,050,073 2, 175,630 2,315,598 2,569,216 2,802,203 Baseband Links 55,824 33,267 27,397 24,530 27, 184 Analog Links 46,224 19,714 12,879 5,702 4,376 Digital Links 1,948,025 2,122,649 2,275,322 2,538,984 2,770,643 Equipped Channels 23,249,348 23,531,608 23,876,584 26,559,536 24,246,872 Copper 22,812,490 22,956,294 23,170,964 25,859,210 23,561,094 Fiber 435,420 575,314 703,502 698, 147 685,674 other 1,438 0 2, 118 2,179 104 Working Channels 13,690,957 14, 174,295 14,809,462 16,618,801 15,347, 150 Copper 13,482,875 13,846,854 14,359, 158 16, 138,681 14,873,448 Fiber 207,186 327,441 449, 121 478,913 473,650 other 896 0 1, 183 1,207 52 Copper Pair Sw. Term.-Loop 21,773,704 22,015,832 22,128,232 24,473, 136 22, 168,428 Fiber Cent. Ofc. Loop Termin. 51,375 65,444 73,993 83,313 81,953 DS-1 Term.- Cust. Prem. Fiber 10,882 11,837 20,010 24,386 28,875 DS-3 Term.- Cust. Prem. Fiber 1,088 1,434 1,066 1,297 1,339 Please refer to text for notes and data qualifications 20 . Table 8 (a): GTE/CONTEL Companies -- Switching System Data 1992 1992 1993 1994 1995 Gross Plant Expenditures 2,784 2,661 2,618 2,771 2,620 (In Millions $) Local Switches 6,422 6,597 6,731 6,153 6,271 Tandem Switches 159 162 158 143 157 Hosts 737 924 955 849 884 Remotes (Stand Alone Only) 2,048 1,558 1,732 1,767 2,031 Total Switching Entitles 6,441 6,631 6,769 6, 171 6,291 Electromechanical 1,462 1,339 1, 197 934 679 Analog Stored Pgm. Control · 98 83 78 46 26 Digital Stored Pgm. Control 4,881 5,209 5,494 5,191 5,586 Total Access Lines (000) 15,633 15,781 16,275 16,064 16,642 Electromechanical Switches 1,434 1,260 1,084 797 533 Analog Stored Pgm Ctrl Sw. 1,388 1,030 834 508 378 Digital Stored Pgm Ctrl Sw. 12,811 13,491 14,357 14,759 15,731 Touch Tone Capable Switches 6,422 6,597 6,731 6,153 6,274 T. Tone Capable Access Lines 15,633 15,781 16,274 16,064 16,641 Equal Accelll! Switches 3,006 4,930 5,399 5,121 5,622 Equal Access Lines (000) 13,211 14, 186 15,069 15, 190 16, 114 Signal. Sys 7 Switch (SS7-394) o 1,499 2,034 2,250 2,930 SS7-394 Access Lines (000) o 6,506 8,885 10,774 12,868 Signal. Sys 7 Switch (SS7-317) 421 2,042 2,157 2,250 2,930 SS7-317 Access Lines (OOO) 4,872 9,073 9,715 10,774 12,868 ISDN Capable Switches 44 218 272 270 390 ISON Access Line Capac. (000) 730 1,399 2,095 5,003 6,249 ISON Basic Rate lnterf. Eq'pd 8,884 22,763 30,741 63,012 91,326 . ISON Primarv Rate lnterf.Ea'Dd 77 475 896 1,406 2,703 Please refer to text for notes and data qualifications 21 Table 8 (b): GTE/CONTEL Companies -- Transmission System Data 1992 1992 1993 1994 1995 Total Sheath-Kilometers 944,665 1,582, 102 1,495,496 1,318,502 1,234,633 Copper Sheath-Kilometers 896,306 1,259,691 1, 147,707 1,252,041 1, 167,365 Fiber Sheath-Kilometers 48,359 52,093 69,349 66,461 67,268 Other Sheath-Kilometers 0 270,318 278,440 0 0 Total Carrier Links 211,857 346,524 411,407 499,921 606,379 Copper Links 88,636 116,096 117,500 118,932 118,759 Fiber Links 115,893 216,679 282,841 368,310 475,945 Radio Links 7,328 13,749 11,066 12,679 11,675 Total Circuit Links 2,703,433 2,989,915 3,098,419 3,430,454 4, 104,644 Baseband Links 138,930 62,506 60,567 58,835 55,704 Analog Links 20,921 8,124 6,680 4,736 ·3,729 Digital Links 2,543,582 2,919,285 3,031, 172 3,366,883 4,045,211 Equipped Channels 27,825,252 28,018,836 28,605,286 28,043,406 30,593,768 Copper 26,829, 116 26,644,992 26,989,260 26,280,274 28,716,902 Fiber 993,596 1,370,617 1,607,049 1,758,085 1,871,908 Other 2,540 3,227 8,977 5,047 4,958 Working Channels 17,827,976 18,770,008 18,672,864 18,809,320 19,749,732 Copper 17, 152,862 17,846,680 17,557,932 17,636,318 18,476,992 Fiber 673,074 921,388 1, 113,803 1, 170,276 1,270, 132 Other 2,040 1,940 1,129 2,726 2,608 Copper Pair Sw. Term.-Loop 26,611,408 26,610,870 58,156,304 26,074,368 28,707,804 Fiber Cent. Ofc. Loop Termin. 18,640 26,504 38,494 55,481 71,762 OS-1 Term.- Cust. Prem. Fiber 1,410 4,455 5,984 7,941 14,619 OS-3 Term.- Cust. Prem. Fiber 523 2,031 3,825 4,436 4,556 Please refer to text for notes and data qualifications 22 Table 9 (a): Bell Companies •• Switching System Data 1991 1992 1993 1994 1995 Gross Plant Expenditures 14,502 14,629 14,683 14,667 15;436 (In Millions $) Local Switches 9,829 9,905 9,912 9,861 9,883 Tandem Switches 304 315 318 314 313 Hosts 1,263 1,343 1,411 1,426 1,498 Remotes (Stand _Alone Only) 3,584 4, 131 4,617 4,939 5,109 Total Switching Entitles 9,957 10,069 10,083 10,021 10,050 Electromechanical 1,148 615 291 95 60 Analog Stored Pgm. Control 2,167 1,924 1,554 1,133 976 Digital Stored Pgm. Control 6,642 7,530 8,238 8,793 9,014 Total Access Lines (OOO) 107,387 109,994 113,369 117,313 122,229 Electromechanical Switches 1,876 717 264 115 63 Analog Stored Pgm Ctrl Sw. 53,450 48,952 41,912 33,175 29,031 Digital Stored Pgm Ctrl Sw. 52,061 60,325 71, 193 84,023 93,135 Touch Tone Capable Switches 9,715 9,948 9,959 9,906 9,879 T. Tone Capable Access Lines 107,214 109,997 113,367 117,270 122,229 Equal Access Switches 8,601 9,292 9,697 9,933 9,977 Equal Access Unes (000) 105,413 109,006 112,992 117,266 122,210 0 0 0 0 0 Signal. Sys 7 Switch (SS7-394) 1,248 4,246 6,003 8,109 8,960 SS7·394 Access Lines (000) 23,377 64,643 87,232 107,825 116,364 Signal. Sys 7 Switch (SS7-317) 3,670 5,437 6,688 8,334 8,977 SS7-317 Access Lines (000) 57,327 77,102 92,492 109,585 116,568 ISDN Capable Switches 920 1,219 1,874 2,388 2,868 ISDN Access Une Capac. (000) 20,567 28,375 39,875 56,818 80, 159 ISDN Basic Rate lnterf. Eq'pd 289,292 468,667 554,820 727,983 925,865 ISDN Prlmarv Rate lnterf.Ea'Dd 1,653 2,672 4,912 14,120 34,012 Please refer to text for notes and data qualifications 23 Table 9 (b): Bell Companies •• Transmission System Data 1991 1992 1993 1994 1995 Total Sheath-Kilometers 4, 161,274 4,214,813 4,264,569 4,256,253 4,278,481 Copper Sheath-Kiiometers 3,955,622 3,965,405 3,976,100 3,934,242 3,922,402 Fiber Sheath-Kiiometers 196,791 238,405 280,017 314,661 348,909 Other Sheath-Kilometers 8,861 11,003 8,452 7,350 7,170 Total Carrier Links 3,283,956 3,570, 147 4,020,454 4,494,544 5,688,380 Copper Links 1,048,545 869,052 803,035 569,428 486,608 Fiber Links 2, 154,043 2,610, 185 3, 126,737 3,843,414 5,132,640 Radio Links 81,368 90,910 90,682 81,702 69, 132 Total Circuit Links 16,382,990 16,936,496 17,480, 137 19,862,967 21,280,654 Baseband Links 1,324,771 905,946 630,460 488,510 367,786 Analog Links 66,571 28,956 16, 135 7,470 4,918 Digital Links 14,991,648 16,001,594 16,833,542 19,366,987 20,907,950 Equipped Channels 187,777,747 199,710,300 213,693, 102 222, 166,286 233, 174,721 Copper 180,538,034 190,509,928 193,760,648 197,354,890 198,236,366 Fiber 7,234,047- 9, 199,377 19,929,357 24,808,191 34,937,148 Other 5,666 995 3,097 3,205 1,207 Working Channels 118,654,347 120,847,403 123,696,676 130,699,087 136,230,813 Copper 114,046,814 114,609,436 115,221,604 119,422,417 122,975,272 Fiber 4,605,184 6,237,727 8,473,646 11,275,228 13,255,293 Other 2,349 240 1,426 1,442 248 Copper Pair Sw. Term.-Loop 181,769,792 182,448,502 183,819,758 186,735, 186 184, 159,296 Fiber Cent. Ofc. Loop Termln. 259,058 450,209 560,159 678,984 823,726 DS-1 Term.- Cust. Prem. Fiber 73,731 102,303 139,865 176,294 207,421 DS-3 Term.- Cust. Prem. Fiber 8,128 12,793 12,432 15,527 17,276 Please refer to text for notes and data qualifications 24 Table 10 (a): All Companies -- Switching System Data 1991 1992 1993 1994 1995 Gross Plant Expenditures 17,286 17,290 17,302 17,438 18,056 (In Millions $) Local Switches 16,251 16,502 16,643 16,014 16, 154 Tandem Switches 463 477 476 457 470 Hosts 2,000 2,267 2,366 2,275 2,382 Remotes (Stand Alone Only) 5,632 5,689 6,349 6,706 7,140 Total Switching Entities 16,398 16,700 16,852 16, 192 16,341 Electromechanical 2,610 1,954 1,488 1,029 739 Analog Stored Pgm. Control 2,265 2,007 1,632 1, 179 1,002 Digital Stored Pgm. Control 11,523 12,739 13,732 13,984 14,600 Total Access Unes (000) 123,020 125,775 129,644 133,377 138,871 Electromechanical Switches 3,310 1,977 1,348 912 596 Analog Stored Pgm Ctrl Sw. 54,838 49,982 42,746 33,683 29,409 Digital Stored Pgm Ctrl Sw. 64,872 73,816 85,550 98,782 108,866 Touch Tone Capable Switches 16, 137 16,545 16,690 16,059 16, 153 T. Tone Capable Access Lines 122,847 125,778 129,641 133,334 138,870 Equal Access Switches 11,607 14,222 15,096 15,054 15,599 Equal Access Unes (000) 118,624 123, 192 128,061 132,456 138,324 Signal. Sys 7 Switch (SS7·394) 1,248 5,745 8,037 10,359 11,890 SS7-394 Access Lines (000) 23,377 71, 149 96, 117 118,599 129,232 Signal. Sys 7 Switch (SS7-317) 4,091 7,479 8,845 10,584 11,907 SS7-317 Access Unes (000) 62,199 86,175 102,207 120,359 129,436 ISDN Capable Switches 964 1,437 2,146 2,658 3,258 ISDN Access Une Capac. (000) 21,297 29,774 41,970 61,821 86,408 ISDN Basic Rate lnterf. Eq'pd 298,176 491,430 585,561 790,995, 1,017, 191 ISDN Primary Rate lntert.Eq'pd 1,730 3,147 5,808 15,526 36,715 Please refer to text for notes and data qualifications 25 Table 10 (b): All Companies - Transmission System Data 1991 1992 1993 1994 1995 Total Sheath-Kilometers 5,105,939 5,796,915 5,760,065 5,574,755 5,513,114 Copper Sheath-Kilometers 4,851,928 5,225,096 5, 123,807 5, 186,283 5,089,767 Fiber Sheath-Kiiometers 245,150 290,498 349,366 381, 122 416, 1_77 Other Sheath-Kilometers 8,861 281,321 286,892 7,350 7,170 Total Carrier Llnks 3,495,813 3,916,671 4,431,861 4,994,465 6,294,759 Copper Links 1,137,181 985, 148 920,535 688,360 605,367 Fiber Llnks 2,269,936 2,826,864 3,409,578 4,211,724 5,608,585 Radio Links 88,696 104,659 101,748 94,381 80,807 Total Circuit Llnks 19,086,423 19,926,411 20,578,556 23,293,421 25,385,298 Baseband Llnks 1,463,701 968,452 691,027 547,345 423,490 Analog Links 87,492 37,080 22,815 12,206 8,647 Digital Links 17,535,230 18,920,879 19,864,714 22,733,870 24,953,161 Equipped Channels 215,602,999 227, 729, 136 242,298,388 250,209,692 263,768,489 Copper 207,367, 150 217, 154,920 220,749,908 223,635, 164 226,953,268 Fiber 8,227,643 10,569,994 21,536,406 26,566,276 36,809,056 other 8,206 4,222 12,074 8,252 6,165 Working Channels 136,482,323 139,617,411 142,369,540 149,508,407 155,980,545 Copper 131, 199,676 132,456, 116 132,779,536 137,058, 735 141,452,264 Fiber 5,278,258 7,159,115 9,587,449 12,445,504 14,525,425 other 4,389 2,180 2,555 4,168 2,856 Copper Pair Sw. Term.-Loop 208,381,200 209,059,372 241,976,062 212,809,554 212,867, 100 Fiber Cent. Ofc. Loop Termin. 277,698 476,713 598,653 734,465 895,488 DS-1 Term.- Cust. Prem. Fiber 75, 141 106,758 145,849 184,235 222,040 DS-3 Term.- Cust. Prem. Fiber 8,651 14,824 16,257 19,963 21,832 Please refer to text for notes and data qualifications 26 Appendix A ARMIS 43-07 Report -- Summarized items included in the report The following items that are extracted from the raw data are contained in Tables l(a) through lO(a). Row numbers refer to the source data files described in this appendix. 1. Gross Plant Expenditures -- See Row 0540. 2. Local Switches -- See Row 0111. 3. Tandem Switches -- See Row 0112. 4. Hosts -- See Row 0113. 5. Remotes (Stand Alone Only) -- See Row 0114. 6. Switching Entities -- See Row0110. 7. Access Lines Served -- See Row 0120. 8. Touch-Tone Capable Switches -- See Row 0210. 9. Touch-Tone Capable Access Lines-- See Row 0220. 10. Equal Access Switches -- See Row 0190. 11. Equal Access Lines - See Row 0200. 12. Signalling System 7 Switches -- See Rows 0234 and 0240. 13. Signalling System 7 Access Lines -- See Rows 0232 and 0236. 14. ISDN Capable Switches -- See Row 0270. 15. ISDN Potential Access Line Capacity -- See Row 0300. 16. ISDN Basic Rate Interfaces Equipped -- See Row 0311. 17. ISDN Primary Rate Interfaces Equipped -- See Row 0312. The following items are contained in Tables 1 (b) through 10 (b). 1. Total Sheath-Kilometers -- See Row 0320. 2. Total Carrier Links -- See Rows 0351, 0362 and 0363. 3. Total Circuit Links -- See Rows 0331, 0332 and 0333. 4. Equipped Channels -- See Row 0420. 5. Working Channels -- See Row 0370. 6. Copper Pair Main Frame Terminations in the Loop Plant-- 7. Fiber Strand Central Office Terminations in the Loop Plant-- 8. DS-1 Terminations on Customer Premise Fiber -- 9. DS-3 Terminations on Customer Premise Fiber -- 1 See Row 0470. See Row 0480. See Row 0482. See Row 0484. ARMIS 43-07 Report - Row Deimitions Associated with Raw Filed Data The terms switch, switching entity, and entity are used interchangeably in the following definitions. The terms access lines, lines, and lines in service are also used interchangeably. Switching Entities - Switching entities are assemblies of equipment designed to establish connections between lines and trunks. Switching entities include access tandems, local, class 5 switching machines and any associated remotes; e.g., a host end office and its three associated remotes will be reported as four switching entities. There may be more than one switching entity per central office or wire center. Switching entities designed exclusively for operator services are not reported here. Lines in Service - Access lines include all classifications of local exchange telephone service including, but not limited to: individual lines, party line access, PBX access, Centrex access, Coin access, Foreign exchange access and WATS access. Access lines, as defined herein, is a more inclusive term than billable access lines, as defined in the ARMIS 43-01 and 43-04 reports. See row instructions for rows 2090 through 2140 of the ARMIS 43-01 report and for 9010 of the ARMIS 43-04 report for the definition of billable access lines. This item is rounded to the nearest thousand. Row 0110 - Total Switching Entities - The total number of local and access tandem switching ' entities. Remotes to be included in the total switching entities count are those described. in the general definition ofremote. A remote switching entity can generally be described as a switching entity that has no connection to the facilities network except through one other (host) switching entity. A remote swithing entity shares the processing capabilities of the host switching system for certain control functions under the direction of the host central processor, and can be controlled remotely by the host over a pair of dedicated data links. The total number of switching entities is equal to the sum of rows 0130, 0150 and 0170. Tandem switching entities are used to connect local switching entities with local switching entities in other central offices. This report includes those tandems that are designed exclusively to establish connections between trunks. Since some switches are used for both local and access tandem switching, the sum of rows 0111 and 0112 may be greater than the amounts entered on this row. Since we are asking only for the number of remotes with stand alone capability, the total of rows 0113 and 0114 will be less than the totals entered on this row. For example, if there are 16 total switching entities, and there are 3 hosts and 7 remotes that have stand-alone capability, the sum of rows 0113 and 0114 would be less than the amount of total switching entities. Row 0111 - Local Switches - The total number of switches used as local switches. This amount is equal to the sum of rows 132, 152 and 172. 2 Row 0112 - Access Tandems - The total number of switches with access tandem capability. This amount is equal to the sum of rows 134, 154 and 174. Row 0113 - Hosts - A host is a switch serving one or more remotes. Row 0114 - Remotes (Stand Alone Only) - A remote switching entity is defined under the definition for row 110 above. All types of remote switches are included with the switching entity counts on row 110. However, only those remote switching entities that are equipped to operate in a stand-alone fashion (i.e., able to operate when the host fails, or the data links to the host fail) to be able to provide more limited service, are reported on row 0114. Remote entities that are not within this description are not included on this row. Row 0120 - Total Number Access Lines In Service - The total number of access lines in service. This amount is equal to the sum of rows 0140, 0160 and 0180. This item is rounded to the nearest thousand. Type of Switch - Types of switches include Electro-Mechanical (E/M), e.g., Step-by-Step and Crossbar; Analog Stored Program Controlled (ASPC); and Digital Stored Program Controlled (DSPC). Row 0130 - Total E/M Switches - The total number of local and tandem Electro-Mechanical switches. Since some switches are used for both local and tandem switching, the sum of rows 132 and 134 may be greater than the amounts entered on this row (see example, row 0110). Row 0131 - Percent Total Switches - The ratio of Electro-Mechanical switches to total switches, in percent (row 130 divided by row 110). This item is rounded to 2 decimal places. Row 0132 - EIM Local Switches - The total number of Electro-Mechanical switches used as local switches. Row 0133 - Percent Local Switches - The ratio of Electro-Mechanical local switches to total local switches, in percent (row 0132 divided by row 0111). This item is rounded to 2 decimal places. Row 0134 - E/M Tandems - The total number of Electro-Mechanical switches with tandem capability. Row 0135 - Percent Total Tandems - The ratio of Electro-Mechanical tandems to total tandems, in percent (row 0134 divided by 0112). This item is rounded to 2 decimal places. Row 140 - EIM Lines Served - The number of lines served by Electro-Mechanical switches. This item is rounded to the nearest thousand. 3 Row 0141 - Percent Total Lines - The ratio of lines served by Electro-Mechanical switches to total lines in service, in percent (row 0140 divided by row 0120). This item is rounded to 2 decimal places. Row 0150 - Total ASPC Switches - The total number of local and tandem Analog Stored Program Controlled switches. Since some switches are used for both local and tandem switching, the sum of rows 152 and 154 may be greater than the amounts entered on this row (see example, row 0110). Row 0151 - Percent Total Switches - The ratio of Analog Stored Program Controlled switches to total switches, in percent (row 0150 divided by row 0110). This item is rounded to 2 decimal places. Row 0152 - ASPC Local Switches - The total number of Analog Stored Program Controlled switches used as local switches. Row 0153 - Percent Local Switches - The ratio of Analog Stored Program Controlled switches to total local switches, in percent (row 0152 divided by row 0111). This item is rounded to 2 decimal places. Row 0154 - ASPC Tandems - The total number of Analog Stored Program Controlled switches with tandem capability. Row 0155 - Percent Total Tandems - The ratio of Analog Stored Program Controlled tandems to total tandems, in percent (row 0154 divided by row 0112). This item is rounded to 2 decimal places. Row 0160 - ASPC Lines Served - The number of lines served by Analog Stored Program Controlled switches. This item is rounded to the nearest thousand. Row 0161 - Percent Total Lines - The ratio oflines served by Analog Stored Program Controlled switches to total lines in service, in percent (row 160 divided by row 0120). This item is rounded to 2 decimal places. Row 0170 - Total DSPC Switches - The total number of local and tandem Digital Stored Program Controllea switches. Since some switches are used for both local and tandem switching, the sum of rows 172 and 174 may be greater than the amounts entered on this row (see example, row 0110). Row 0171 - Percent Total Switches - The ratio of Digital Stored Program Controlled switches to total switches, in percent (row 0170 divided by row 0110). This item is rounded to 2 decimal places. 4 Row 0172 - DSPC Local Switches - The total number of Digital Stored Program Controlled switches used as local switches. Row 0173 - Percent Local Switches - The ratio of Digital Stored Program Controlled local switches to total local switches, in percent (row 0172 divided by row 0111). This item is rounded to 2 decimal places. Row 0174- DSPC Tandems -The total number of Digital Stored Program Controlled switches with tandem capability. Row 175 - Percent Total Tandems - The ratio of Digital Stored Program Controlled tandems to total tandems, in percent (row 0174 divided by row 0112). This item is rounded to 2 decimal places. Row 0180 - DSPC Lines Served - The number of lines served by Digital Stored Program Controlled switches. This item is rounded to the nearest thousand. Row 0181 - Percent Total Lines -The ratio oflines served by Digital Stored Program Controlled switches to total lines in service, in percent (row 0180 divided by row 0120). This item is rounded to 2 decimal places. Row 0190 - Switches Equipped for Equal Access - The number of switching entities equipped for equal access, Feature Group D service. Row 0191 - Percent Total Switches - The ratio of switches equipped for equal access to total switches, in percent (row 0190 divided by row 0110). This item is rounded to 2 decimal places. Row 0200 - Access Lines with Equal Access - The number of access lines served by switches equipped for equal access. This item is rounded to the nearest thousand. Row 0201 - Percent Total Lines - The ratio oflines served by switches equipped for equal access to total lines in service, in percent (row 0200 divided by row 0120). This item is rounded to 2 decimal places. Row 0210 - Touch-Tone Capable Switches - The number of switching entities equipped for Touch-Tone. Row 0211 - Percent Total Switches - The ratio of switches equipped for Touch-Tone to total switches, in percent (row 0210 divided by row 0110). This item is rounded to 2 decimal places. Row 0220 - Access Lines with Touch-Tone Capability - The number of access lines served by switches equipped for Touch-Tone. This item is rounded to the nearest thousand. 5 Row 0221 - Percent Total Lines - The ratio of access lines served by switches equipped for Touch-Tone to total access lines, in percent (row 0220 divided by row 0120). This item is rounded to 2 decimal places. Row 0230 - Total Switches Equipped with SS7-394 - The total number of local and tandem switches equipped with SS7-394. Row 0231 - Percent Total Switches - The ratio of switches equipped with SS7-394 to total switches, in percent (row 0230 divided by row 0110). This item is rounded to 2 decimal places. Row 0232 - Lines with Access to SS7-394 - The number of lines in service that are served by switches equipped with SS7-394. This item is rounded to the nearest thousand. Row 0233 - Percent Total Access Lines - The ratio of lines owned by entities equipped with SS7-394 to total access lines, in percent (row 0232 divided by row 0120). This item is rounded to 2 decimal places. Row 0234 - Total Switches Equipped with SS7-317 - The total number of switches equipped with SS7-317. Row 0235 - Percent Total Switches - The ratio of switches equipped with SS7-317 to total switches, in percent (row 0234 divided by row 0110). This item is rounded to 2 decimal places. Row 0236 - Lines with Access to SS7-317 - The number of lines served by switches equipped with SS7-3 l 7. This item is rounded to the nearest thousand .. Row 0237 - Percent Total Access Lines - The ratio of access lines served by switches equipped with SS7-317 to total access lines, in percent (row 0236 divided by row 0120). This item is rounded to 2 decimal places. Row 0240 - Local Switches Equipped with SS7-394 - The number of switches used as local switches that are equipped with SS7-394. Row 0241 - Percent Total Local Switches - The ratio of local switches equipped with SS7-394 to total local switches, in percent (row 0240 divided by row 0111). This item is rounded to 2 decimal places. · Row 0246 - Local Switches Equipped with SS7-317 - The total number of local switches equipped with SS7-317. Row 0247 - Percent Total Local Switches - The ratio of local switches equipped with SS7-317 to total local switches, in percent (row 0246 divided by row 0111). This item is rounded to 2 decimal places. 6 Row 0250 - Tandems Equipped with SS7-394 - The total number of switches with tandem capability that are equipped with SS7-394. Row 0251 - Percent Total Tandems - The ratio of tandem switches equipped with SS7-394 to total tandems, in percent (row 0250 divided by row 0112). This item is rounded to 2 decimal places. Row 0256 - Tandems Equipped with SS7-317 - The total number of switches with tandem capability that are equipped with SS7-317. Row 0257 - Percent Total Tandems - The ratio of tandem switches equipped with SS7-317 to total tandems, in percent (row 0256 divided by row 0112). This item is rounded to 2 decimal places. Row 0270 - Total Switches Equipped with ISDN - The total number of local and tandem switches that are equipped with ISDN. Since some switches are used for both local and tandem switching, the sum of rows 0280 and 0290 may be greater than the amounts entered on this row (see example, row 0110). Row 0271 - Percent Total Switches - The ratio of switches equipped with ISDN to total switches, in percent (row 0270 divided by row 0110). This item is rounded to 2 decimal places. Row 0280 - Local Switches Equipped with ISDN - The number of switches used as local switches that are equipped with ISDN. Row 0281 - Percent Total Local Switches - The ratio of local switches equipped with ISDN to total local switches, in percent (row 0280 divided by row 0111). This item is rounded to 2 decimal 'places. Row 0290 - Tandems Equipped with ISDN - The number of switches with tandem capability that are equipped with ISDN. Row 0291 - Percent Total Tandems - The ratio of tandems equipped with ISDN to total tandems, in percent (row 0290 divided by row 0112). This item is rounded to 2 decimal places. Row 0300 - Lines with Access to ISDN - The number of!ines served by switches equipped with ISDN. This item is rounded to the nearest thousand and does not include lines that could be connected (moved) to switches equipped with ISDN. Row 0301 - Percent Total Lines -The ratio of lines served by switches equipped with ISDN to total lines in service, in percent (row 0300 divided by row 0120). This item is rounded to 2 decimal places and does not include lines that could be connected (moved) to switches equipped with ISDN. 7 Row 0311 - Basic Rate ISDN (BRI) Interfaces Equipped - Basic rate ISDN consists of two Bearer Channels at 64 Kilobits/second and one Delta Channel at 16 kilobits/second. Quantities reflected are the number of (2B+D) BRI interfaces equipped. This amount represents actual interfaces equipped with ISDN. Row 0312 - Primary Rate ISDN (PRI) Interfaces Equipped - Equivalent primary rate ISDN interfaces are generally configured as 23 Bearer Channels and one Delta Channel all at 64 kilobits/second. Quantities reflected are the number of equivalent PRI (23B+D) interfaces equipped, excluding interoffice PRI interfaces. This amount represents actual interfaces equipped with ISDN. Row 0320 - Total Sheath-Kilometers - Sheath-kiiometers include loop, interoffice and toll sheath kilometers. A sheath-kilometer may include multiple (derived) lines and circuits. This item is rounded to 1 decimal place. Row 0321 - Copper - The number of sheath-kilometers of twisted pair copper. This item is rounded to 1 decimal place. Row 0322 - Fiber - The number of sheath-kilometers of fiber. This item is rounded to 1 decimal place. Row 0323 - Other - The number of sheath-kilometers of aluminum, coaxial, and all other sheath­ kilometers not included in rows 0321 or 0322. This item is rounded to 1 decimal place. Row 0330 - Total Circuit Links - Links that exist between points A and B where voice frequency/DSG cross-connects and/or analog/digital conversion (collectively referenced here as conversion) occurs. Circuit links are counted as follows: If there is a circuit between A and B with no intermediate conversions, one circuit link represents each voice frequency equivalent channel. If there is a circuit between A and B with one intermediate conversion, two circuit links represent each voice frequency equivalent channel. Similarly, two intermediate conversions between A and B would result in three circuit links per voice equivalent channel. Row 0331 - Baseband - The number of baseband circuit links. Row 0332 - Analog CXR - The number of analog CXR circuit links, converted to voice frequency equivalents. Row 0333 - Digital CXR - The number of digital CXR circuit links, converted to voice-grade equivalents. 8 Carrier Links - A Carrier Technology Segment (carrier link) is defined as a segment of the interoffice network disaggregated by technology (i.e., analog, digital) and by medium (i.e., copper, fiber, or radio). Each segment between central offices or other interoffice network nodes is defined as a unique carrier technology segment. For these purposes, a central office is an interoffice network node. Other interoffice network nodes are defined as any points in the interoffice network where a cross-connect occurs or where a change in technology or medium occurs. Counts are on an analog group or DS-1 equivalent basis. Row 0350 - Analog Carrier Links - The number of analog carrier links. This amount equals the sum of rows 0351 and 0352. Row 0351 - Copper - The number of copper analog carrier links. Row 0352 - Radio - The number of radio analog carrier links. Row 0360 - Digital Carrier Links - The number of digital carrier links. This amount equals the sum ofr ows 0361, 0362 and 0363. Row 0361 - Copper - The number of copper digital carrier links. Row 0362 - Radio - The number of radio digital carrier links. Row 0363 - Fiber - The number of fiber digital carrier links. Loop Plant - Central Office Terminations - These facilities are from the central office to the end users. Local loop includes analog type services only. It excludes ISDN. Row 0370 -Total Working Channels - Working Channels are on a 4 kHz bandwidth (single voice channel) basis. Working channels originating from a remote switch are treated the same as ifthe channels originated in the host central office. All reports of working channels are counted on this 4 kHz basis for purposes of this report. This amount equals the sum of rows 0380, 0390 and 0410. Row 0380 - Copper - The number of copper working channels. This amount equals the sum of rows 0381, 0382 and 0383. Row 0381 - Baseband - The number of baseband copper working channels, converted to voice frequency equivalents. Row 0382 - Analog CXR - The number of analog carrier copper working channels, converted to voice frequency equivalents. Row 0383 - Digital CXR- The number of digital carrier copper working channels, converted to voice frequency equivalents. 9 Row 390 - Fiber Digital CXR - The number of fiber digital carrier working channels, converted to voice frequency equivalents. Row 0410 - Other - The number of other working channels. Row 0420 - Total Equipped Channels - Equipped channels are on a 4 kHz bandwidth (single voice channel) basis. Equipped channels originating from a remote switch are treated the same as if the channels originated in the host central office. 1bis amount equals the sum of rows 0430, 0440 and 0460. Row 0430 - Copper - The number of copper equipped channels. 1bis amount equals the sum of rows 0431, 0432 and 0433. Row 0431 - Baseband - The number of baseband copper equipped channels. Row 0432 - Analog CXR - The number of analog CXR (carrier) copper equipped channels. Row 0433 - Digital CXR - The number of digital CXR (carrier) copper equipped channels. Row 0440 - Fiber Digital CXR - The number of fiber digital CXR (carrier) equipped channels. Row 0460 - Other - The number of other equipped channels. Row 0470 - Copper Pairs Terminated at the Main Frame (Loop Plant Only) - The number of copper pairs terminated at the main frame. Row 0480 - Fiber Strands Terminated in the Central Office (Loop Plant Only) - The number of individual fiber strands terminated in central offices. Row 0481 - Fiber Terminated at Customer's Premises at the DS-0 Rate - The number of individ~ customer services provided over fiber strands terminated at the customer's premises, . other than trials, at the DS-0 rate. Row 0482 - Fiber Terminated at Customer's Premises at the DS-1 Rate - The number of individual customer services provided over fiber strands terminated at the customer's premises, other than trials, at the DS-1 rate. Row 0483 - Fiber Terminated at Customer's Premises at the DS-2 Rate - The number of individual customer services provided over fiber strands terminated at the customer's premises, other than trials, at the DS-2 rate. 10 Row 0484 - Fiber Terminated at the Customer's Premises at the DS-3 Rate or Higher -The number of individual customer services provided over fiber strands terminated at the customer's premises, other than trials, at the DS-3 rate or higher. Row 0510 - Total - The data for the total number of end offices in the appropriate columns. Row 0511 - End Offices/Electro-Mechanical Switches - The data for the total number of end offices equipped with electro-mechanical switches in the appropriate columns. Row 0512 - End Offices/SPC Analog Switches - The data for the total number of end offices equipped with SPC analog switches in the appropriate columns. Row 0513 - End Offices/Digital Switches - The data for the total number of end offices equipped with Digital Switches in the appropriate columns. Row 0520 - Total Access Lines - The percent of the network represented by the total number of access lines. (Rounded to 2 decimal places.) Row 0521 - Access Lines/Electro-Mechanical Switches - The percent of the network represented by the total number of access lines equipped with electro-mechanical switches. This item is rounded to 2 decimal places. Row 0522 - Access Lines/SPC Analog Switches - The percent of the network represented by the total number of access lines equipped with SPC analog switches. This item is rounded to 2 decimal places. Row 0523 - Access Lines/ Digital Switches - The percent of the network represented by the total number·of access lines equipped with Digital Switches. This item is rounded to 2 decimal places. Row 0530 - Total Access Lines in Service - The number of all access lines in service. (Rounded to the nearest thousand.) Row 0531 - Access Line Gain - A quantity calculated by subtracting outward movement from inward movement. Row 0540 - Total Gross Capital Expenditures - The dollar amount of gross additions to accounts 2110, 2210, 2220, 2230, 2310, 2410, 2680 and 2690 during the current reporting period. See also ARMIS Report 43-02, table B-1, row 260, column (ac). Gross capital expenditures are consistent with Form M and ARMIS. (Rounded to the nearest thousand. ) 11 ARMIS 43-07 Report -- Column Definitions Associated with Raw Filed Data Table I Column (a) - Total Study Area - The sum of MSA and non-MSA data representing the entire study area. A study area usually consists of a telephone company's service territory in a given state, although telephone companies occasionally have more than one study area in a particular state. The facilities in the total study area are entered in this column. This amount should equal column (b) plus column ( c ). Column (b) - within MSA - Data for all MSAs served within the study area. MSAs, or Metropolitan Statistical Areas, are designated by the Office of Management and Budget in a list following each decennial census. An MSA includes at least one city with a minimum population of 50,000 and its surrounding area, or a Census Bureau defined urbanized area of at least 50,000 population located in one or more counties that qualify and whose population is at least 100,000. See, 45 Fed. Reg. 956 (1980). The facilities within any MSA in the study area are entered in this column. Column (c) - non-MSA - Data for all areas which lie outside of any MSA. The facilities in the study area which are located outside of any MSA are entered in this column. Table II Column (d) - Total Study Area - See description for Table I, column (a). Table III Call Set-Up Time - For the purposes of infrastructure reporting, call set-up time is defined as "the time between dialing the last digit and the response or acknowledgement 'winkback', or the acknowledgement of signal receipt from the interexchange carrier." Column( e) - End Offices - The total number of end offices appropriate for each row. The access line counts in this column should be consistent with the access line data provided in Table I of the Infrastructure Report. The number of end offices used in the Bellcore studies that developed the underlying data are footnoted. Average Call Set-Up Time - The average amount of call set-up time for all end-office types. Direct - Direct access from the end office to the interexchange carrier point of presence (POP). Column (f) - SS7-394 - The average call set-up time, or the percent of network represented, as appropriate, for direct access from end offices using SS7-394. 12 Column (g) - MF - The average call set-up time, or the percent of the network represented, as appropriate, for direct access from end offices using multifrequency signalling. Via Access Tandem - End Offices routing calls through a switch having tandem capability. Column (h) - SS7-394 - The average call set-up time, or the percent of the network represented, as appropriate, for end office routing calls through tandem switches using SS7-394. Column (i) - MF ~ The average call set-up time, or percent of the network represented, as appropriate, for end offices routing calls through tandem switches using multifrequency signalling. Column G) - Mixed - The average call set-up time, or percent of the network represented, as appropriate, for end offices using multifrequency signalling, routing calls through an access tandem switch using SS7-394 signalling . Table IV Column (k) - Total Study Area - See description for Table I, column (a). 13 Appendix B: Raw Data Version Numbers Used in the Tables 1991 1992 1993 1994 1995 Ameritech I 2 I I I Bell Atlantic I 2 3 2 I BellSouth 2 I I I I NYNEX 2 I 2 3 3 Pacific Telesis 4 3 3 2 2 Southwestern (SBC) 2 3 2 I I US West I I I I I GTE 4 2 I 4 1 1