10 - 1 10. Infrastructure The infrastructure information contained in this section is based upon data collected by the FCC as part of its price-cap monitoring procedures. 1 This summary is intended to highlight changes in the use of technology in the local telephone company plant. The data (ARMIS 43-07 reports 2 ) upon which this infrastructure summary is based are due April 1 for the previous calendar year. This infrastructure section includes data through calendar year 2007. 3 The most recent data were due April 1, 2008. Revisions are only included in this section if they are filed early enough for inclusion; however, this section contains revisions to historical data filed subsequent to cutoff dates for last year’s summary. 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 contained in this section is for the years 1997 through 2007. Changes to our infrastructure data collection process are reflected beginning with filed data for calendar year 2003. A number of items were eliminated from reporting requirements and historical information for these items is no longer shown in this section. 4 Most of the eliminated items relate to switching technologies that have 1 Policy and Rules Concerning Rates For Dominant Carriers, CC Docket No. 87-313, Second Report and Order, 5 FCC Rcd 6786 (1990) (LEC Price Cap Order), Erratum, 5 FCC Rcd 7664 (Com. Car. Bur. 1990); Policy and Rules Concerning Rates For Dominant Carriers, CC Docket No. 87-313, Memorandum Opinion and Order, 8 FCC Rcd 7474 (Com. Car. Bur. 1993) (Service Quality Modifications Order). 2 ARMIS, an acronym for Automated Reporting Management Information System, is a publicly available repository of financial, plant, demand, and quality-of-service data. Additional infrastructure data are contained in the ARMIS 43-08 report. See Statistics of Communications Common Carriers, published annually by the Wireline Competition Bureau’s Industry Analysis and Technology Division, for a compilation of ARMIS 43-08 infrastructure data. 3 See Infrastructure of the Local Operating Companies Aggregated to the Holding Company Level, released April 24, 1995 for data for the years 1989 and 1990. Some of the data for those early years are not a part of this summary and may contain discrepancies that make the early data inconsistent with that of later years. Reports containing data for the early years can be found in the infrastructure section of the Wireline Competition Bureau Statistical Reports Internet site at www.fcc.gov/wcb/stats under the file names INFRA99.ZIP, INFRA98.ZIP, INFRA95.ZIP, and INFRA93.ZIP. More recent reports can be found in Section 10 of earlier versions of this report on the same web page under the section covering the Commission’s Federal-State Joint Board Monitoring Reports. 4 Historical information for the entries that are no longer reported can be found in 10 - 2 become obsolete or reflect virtually complete deployment of capabilities such as touch-tone capability. New data are being collected on hybrid copper/fiber interfaces in the network but most of the carriers have requested proprietary treatment for the data. As a result, the data are not provided in this section. 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). 5 Together, these large companies are estimated to serve about 90% of all incumbents’ access lines nationwide. 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 are available from the Commission's ARMIS web page at http://www.fcc.gov/wcb/eafs/. 6 The information summarized in this section is organized into two sets of tables with the following designations: Table 10.1 shows switching system data. Table 10.2 shows transmission system data. Each set of tables contains segments for each of the regional Bell operating companies (along with Verizon’s GTE companies shown separately) with aggregated summary data for all the 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. In some cases, refiled data may cause values to differ from prior summary reports. Recent data reflect mergers of GTE and Bell Atlantic, which are now under the name Verizon Communications, the acquisitions by SBC of Ameritech, Pacific Telesis, and Southern New England Telephone, and the subsequent mergers of SBC and BellSouth with AT&T. Description of the Technologies and Analysis of the Data The data in the attached tables provide an historical series for a variety of plant elements that illustrate the deployment of technology in the networks of the major local exchange carriers. 7 The data items provide a picture of the well established technologies in use. This section highlights key trends in the evolution of basic telecommunications infrastructure and illustrates the replacement of older technologies with newer ones. In some cases, older Monitoring Reports released prior to 2003 and in the reports noted in footnote 3. 5 See footnote 1. 6 To access ARMIS data from www.fcc.gov/wcb/eafs click on the words “download ARMIS data” and select the desired report, table and row(s). To access data instructions and definitions applicable to the 43-07 report click on the words “ARMIS site map” at the top of the second screen and then select the 43-07 report and table desired. 7 A number of irregularities including time series anomalies have been noted in the data. The companies are typically notified of these observed problems and either file revisions or explanations. Revisions are initially made available on the ARMIS database website noted above. 10 - 3 technologies either no longer exist or are in very limited use. This section reflects recent revisions to the ARMIS 43-07 report from which the data in this summary are obtained. 8 ARMIS data currently collected only cover circuit switches, including remote switches, that provide a dedicated path through the network for the duration of a call, not routers or switches that are used to handle Internet traffic or in connection with frame relay and ATM services that are specifically designed to handle data packets. 9 Almost all of the major local exchange carrier switches are digital. Almost half of these are ISDN capable. The number of ISDN switches increased in 2007, but the rate at which new ISDN switching capability is being added to the network is considerably lower than it was ten years ago. Also in 2007, the reported number of equipped ISDN Primary Rate Interfaces decreased by less than one percent, from 592,064 to 590,428. ISDN basic rate services also decreased somewhat. A number of transmission elements are included in Table 10.2. Definitions for these elements can be found on the Commission’s ARMIS website noted above. These illustrate the rapid development of fiber capacity in terms of terminations, sheath kilometers, and links. 10 The number of sheath kilometers of fiber nearly doubled over the decade 1997-2007, with about 88 thousand additional fiber sheath kilometers being reported in 2007. 11 During the same period, 8 2000 Biennial Regulatory Review – Comprehensive Review of the Accounting Requirements and ARMIS Reporting Requirements for Incumbent Local Exchange Carriers: Phase 2; Amendments to the Uniform System of Accounts for Interconnection; Jurisdictional Separations Reform and Referral to the Federal-State Joint Board; and Local Competition and Broadband Reporting, CC Docket Nos. 00-199, 99-301, 97-212, 80-286, Report and Order in CC Docket Nos. 00-199, 97-212, and 80-286, Further Notice of Proposed Rulemaking in CC Docket Nos. 00-199, 99-301, and 80-286, 16 FCC Rcd 19911 (2001), recon pending (Phase 2 Report and Order). 9 Remote switches as defined in this report only cover those switches capable of functioning if the host switch fails. 10 A large portion of the cost of fiber deployment is associated with labor and installation rather than with the cable itself. See http://www.ihets.org/about/pubs/tech_briefs/fiber_optics.pdf. Thus, the incremental cost of installing a larger fiber cable is typically relatively small. The economics of fiber deployment have resulted in deployments of typical fiber cables containing more than 40 fibers; however, voice circuit requirements could typically be placed on a much smaller number of fibers. 11 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 Fiber Deployment Update-End of Year 1998 (released Sept. 9, 1999) at www.fcc.gov/wcb/iatd/stats.html (FIBER98.ZIP authored by J.Kraushaar, Industry 10 - 4 the number of sheath kilometers of copper remained steady at somewhat over 5 million, and other sheath data, in relative terms, were not significant. Table 10.2 also highlights the relative magnitude of equipped and working channels. Both copper and fiber working channels have declined since 2004. Total interoffice circuit links have steadily declined since 2002. 12 Although the historical level of growth in fiber has been high, its use in the local loop at present appears to be relatively small. The reporting companies included in this section had an installed base of about 247.7 million copper-pair mainframe terminations in their central offices for local loop use in 2007. In comparison, about 3.9 million fiber strands (associated with loop plant) were terminated in central offices by end-of-year 2007. The data show, however, that the number of these terminations increased by more than 11% during 2007. In 2007 DS-3 terminations on fiber facilities grew by almost 25%. Fiber and hybrid copper/fiber systems are becoming increasingly important in the local loop as the number of high-quality copper pairs available to support higher data rate digital services declines. As noted earlier, the data presented in this section do not include data associated with hybrid fiber/copper interfaces including information on offerings of those xDSL services offered over hybrid interfaces for which the companies requested proprietary treatment. 13 Nonetheless the number of ISDN capable lines can be used as an upper bound for potential broadband availability over copper loops, since copper loop characteristics necessary to support ISDN services are also required for xDSL services. 14 Readers interested in more disaggregated information may wish to examine data at a more localized level than presented here. 15 Analysis and Technology Division, Wireline Competition Bureau, Federal Communications Commission). 12 The instructions used by carriers to submit data for this section were designed to address facilities used to provide basic telephone service only. 13 xDSL (Digital Subscriber Line) services offer broadband digital capability using special terminal equipment to allow high-speed data transmission over copper loops, enhancing the capability of existing copper access lines. 14 Table 10.1 includes the number of switch terminations that are available for ISDN and ISDN capable lines. Table 10.2 includes the number of copper loops that are capable of supporting ISDN. 15 Individual study-area data are also available to address more localized issues. This information is available from the ARMIS web page at www.fcc.gov/wcb/eafs/. 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 13,483 16,117 16,261 14,702 14,837 14,051 14,053 14,064 11,997 11,995 12,038 Tandems 414 493 492 498 517 526 544 568 529 528 525 Hosts 2,150 2,471 2,461 2,322 2,338 2,274 2,169 2,156 2,516 2,516 2,524 Remotes (Stand Alone Only) 5,717 7,977 8,103 7,335 7,412 7,383 7,382 7,312 6,520 6,543 6,599 Total Switches 13,711 16,392 16,516 14,953 15,109 14,353 14,376 14,399 12,321 12,315 12,347 Analog Stored Program Control 472 431 314 200 139 107 84 73 65 64 64 Digital Stored Program Control 13,071 15,961 16,202 14,753 14,970 14,245 14,292 14,326 12,256 12,251 12,283 Total Number Access Lines in Service (000) 110,329 155,530 159,364 158,107 155,543 148,292 142,698 136,057 127,026 118,316 109,448 Analog Stored Program Control Lines Served 18,441 16,688 11,713 7,192 4,810 3,283 2,436 1,981 1,566 1,499 1,390 Digital Stored Program Control Lines Served 91,731 138,842 147,651 150,915 150,732 145,009 140,262 134,076 125,460 116,817 108,058 Total Switches Equipped w/SS7-394 (InterLATA) Svc. 11,172 15,148 15,994 14,681 14,954 14,258 14,342 14,366 12,292 12,286 12,323 Total Switches Equipped with ISDN 3,461 5,392 5,735 5,340 5,465 5,664 5,651 5,787 5,730 5,914 5,930 Lines with Access to ISDN (000) 75,450 121,408 127,357 131,041 129,075 124,451 119,422 115,561 107,535 100,085 92,284 Basic Rate ISDN (BRI) Interfaces Equipped 1,136,712 2,491,509 2,720,871 2,775,102 3,097,905 2,860,453 2,590,905 2,637,353 2,606,519 2,568,395 2,550,299 Primary Rate ISDN (PRI) Interfaces Equipped 92,311 234,515 334,910 429,295 720,590 753,491 575,806 586,999 585,278 592,064 590,428 Source: ARMIS Report 43-07. Table 10.1 Switching Data Total - All Companies 10 - 5 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 1,435 1,419 1,432 1,447 1,451 1,455 1,439 1,436 1,439 1,438 1,433 Tandems 47 51 52 53 55 63 65 87 86 86 85 Hosts 243 236 234 234 235 236 236 236 235 232 232 Remotes (Stand Alone Only) 769 764 775 790 789 790 776 779 781 772 769 Total Switches 1,482 1,470 1,485 1,500 1,506 1,518 1,504 1,523 1,525 1,524 1,518 Analog Stored Program Control 58 46 39 37 34 24 16 8 8 8 8 Digital Stored Program Control 1,424 1,424 1,446 1,463 1,472 1,494 1,488 1,515 1,517 1,516 1,510 Total Number Access Lines in Service (000) 20,335 20,790 21,036 20,898 20,074 19,151 18,309 17,287 16,050 14,820 13,458 Analog Stored Program Control Lines Served 2,793 2,193 1,811 1,730 1,491 927 562 276 244 221 196 Digital Stored Program Control Lines Served 17,541 18,597 19,225 19,168 18,583 18,224 17,747 17,011 15,806 14,599 13,262 Total Switches Equipped w/SS7-394 (InterLATA) Svc. 1,463 1,451 1,476 1,492 1,496 1,504 1,504 1,523 1,525 1,524 1,518 Total Switches Equipped with ISDN 695 784 816 822 844 933 863 883 908 906 904 Lines with Access to ISDN (000) 15,464 16,804 17,472 17,388 16,814 16,810 16,160 15,531 14,404 13,248 12,069 Basic Rate ISDN (BRI) Interfaces Equipped 180,280 220,867 259,312 271,468 283,600 290,367 282,643 282,159 280,365 280,495 280,520 Primary Rate ISDN (PRI) Interfaces Equipped 14,569 24,800 38,037 53,926 70,542 75,184 75,766 79,519 80,609 81,487 81,775 Source: ARMIS Report 43-07. Table 10.1 Switching Data AT&T Ameritech Companies 10 - 6 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 1,654 1,653 1,649 1,644 1,642 1,637 1,629 1,625 1,612 1,608 1,608 Tandems 70 71 71 73 77 77 78 79 78 76 76 Hosts 317 307 306 297 304 305 295 295 292 297 297 Remotes (Stand Alone Only) 766 765 765 776 819 829 877 811 810 839 839 Total Switches 1,674 1,673 1,668 1,665 1,665 1,664 1,658 1,653 1,637 1,634 1,634 Analog Stored Program Control 106 100 83 69 54 44 41 39 31 30 30 Digital Stored Program Control 1,568 1,573 1,585 1,596 1,611 1,620 1,617 1,614 1,606 1,604 1,604 Total Number Access Lines in Service (000) 23,080 23,909 24,458 24,558 23,756 22,955 22,206 21,317 19,944 18,740 17,599 Analog Stored Program Control Lines Served 3,746 3,536 2,972 2,362 1,729 1,309 1,154 1,030 699 699 652 Digital Stored Program Control Lines Served 19,334 20,373 21,486 22,197 22,027 21,646 21,052 20,287 19,244 18,041 16,946 Total Switches Equipped w/SS7-394 (InterLATA) Svc. 1,674 1,673 1,668 1,665 1,665 1,664 1,658 1,653 1,637 1,634 1,634 Total Switches Equipped with ISDN 584 596 645 691 678 697 701 809 811 781 780 Lines with Access to ISDN (000) 14,894 15,980 17,413 18,396 17,660 17,457 16,927 17,536 16,607 15,472 14,467 Basic Rate ISDN (BRI) Interfaces Equipped 167,512 183,458 202,391 223,294 228,898 230,066 269,254 281,088 246,880 273,280 239,640 Primary Rate ISDN (PRI) Interfaces Equipped 21,389 33,564 51,669 72,347 85,983 81,328 81,682 86,399 86,185 86,315 86,232 Source: ARMIS Report 43-07. Table 10.1 Switching Data AT&T BellSouth Companies 10 - 7 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 810 801 799 778 781 779 779 778 779 778 778 Tandems 21 24 24 24 31 31 31 35 35 35 35 Hosts 135 121 116 189 114 114 116 116 115 115 117 Remotes (Stand Alone Only) 364 361 350 361 360 358 359 357 357 357 357 Total Switches 830 824 822 802 812 810 807 813 814 813 813 Analog Stored Program Control 49 38 17 0 0000000 Digital Stored Program Control 781 786 805 802 812 810 807 813 814 813 813 Total Number Access Lines in Service (000) 17,155 18,158 18,285 18,236 17,788 17,248 16,693 16,156 15,589 14,767 13,790 Analog Stored Program Control Lines Served 2,422 1,825 754 0 0000000 Digital Stored Program Control Lines Served 14,733 16,333 17,531 18,236 17,788 17,248 16,693 16,156 15,589 14,767 13,790 Total Switches Equipped w/SS7-394 (InterLATA) Svc. 791 803 796 778 812 810 807 813 814 813 813 Total Switches Equipped with ISDN 531 551 574 574 562 560 588 592 592 592 592 Lines with Access to ISDN (000) 13,632 15,134 16,529 17,589 16,966 16,427 16,251 15,759 15,201 14,388 13,427 Basic Rate ISDN (BRI) Interfaces Equipped 314,003 468,493 489,369 421,744 630,816 615,934 347,052 339,563 339,695 339,745 339,501 Primary Rate ISDN (PRI) Interfaces Equipped 20,125 31,345 47,794 49,712 94,742 54,902 53,958 54,670 55,418 57,074 58,266 Source: ARMIS Report 43-07. Table 10.1 Switching Data AT&T Pacific Telesis Companies 10 - 8 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 137 136 161 161 160 167 181 Tandems 1677777 Hosts 81 32 30 30 30 28 29 Remotes (Stand Alone Only) 56 73 82 82 81 88 101 Total Switches 137 136 165 168 167 174 188 Analog Stored Program Control 0000000 Digital Stored Program Control 137 136 165 168 167 174 188 Total Number Access Lines in Service (000) 2,334 2,258 2,173 2,069 1,941 1,787 1,662 Analog Stored Program Control Lines Served 0000000 Digital Stored Program Control Lines Served 2,334 2,258 2,173 2,069 1,941 1,787 1,662 Total Switches Equipped w/SS7-394 (InterLATA) Svc. 137 136 165 168 167 174 188 Total Switches Equipped with ISDN 101 137 103 107 106 105 107 Lines with Access to ISDN (000) 2,031 2,030 1,870 1,776 1,660 1,524 1,411 Basic Rate ISDN (BRI) Interfaces Equipped 38,423 43,254 51,076 51,138 50,348 50,122 50,453 Primary Rate ISDN (PRI) Interfaces Equipped 169,488 192,720 8,465 8,413 8,390 8,490 8,500 Source: ARMIS Report 43-07. Table 10.1 Switching Data AT&T Southern New England 10 - 9 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 1,690 1,644 1,658 1,663 1,660 1,652 1,658 1,654 1,639 1,635 1,622 Tandems 60 67 56 69 70 70 71 68 67 67 67 Hosts 267 230 228 229 230 244 245 246 246 245 248 Remotes (Stand Alone Only) 1,077 1,158 1,163 1,152 1,150 1,150 1,101 1,093 1,079 1,074 1,065 Total Switches 1,750 1,711 1,727 1,715 1,716 1,722 1,728 1,722 1,706 1,702 1,689 Analog Stored Program Control 136 115 88 67 46 34 23 23 23 23 23 Digital Stored Program Control 1,614 1,596 1,639 1,648 1,670 1,688 1,705 1,699 1,683 1,679 1,666 Total Number Access Lines in Service (000) 15,306 15,872 16,287 16,411 15,842 15,294 14,670 13,912 13,034 12,199 11,395 Analog Stored Program Control Lines Served 5,055 4,119 3,107 2,246 1,448 963 652 615 569 531 497 Digital Stored Program Control Lines Served 10,251 11,753 13,180 14,165 14,394 14,331 14,018 13,297 12,465 11,668 10,899 Total Switches Equipped w/SS7-394 (InterLATA) Svc. 1,724 1,707 1,724 1,713 1,713 1,722 1,728 1,722 1,706 1,702 1,689 Total Switches Equipped with ISDN 331 360 428 441 461 472 479 498 497 497 510 Lines with Access to ISDN (000) 10,577 13,361 12,158 12,169 12,056 11,241 10,721 10,069 9,361 8,726 8,333 Basic Rate ISDN (BRI) Interfaces Equipped 185,018 225,427 267,190 281,459 310,326 308,501 309,907 309,172 304,893 306,233 300,424 Primary Rate ISDN (PRI) Interfaces Equipped 15,434 31,570 46,533 59,513 68,236 68,793 71,035 70,860 68,395 72,129 70,423 Source: ARMIS Report 43-07. Table 10.1 Switching Data AT&T Southwestern Bell Companies 10 - 10 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 1,441 1,446 1,428 1,400 1,354 1,337 1,322 1,323 1,319 1,311 1,310 Tandems 51 51 51 53 51 56 56 56 56 56 56 Hosts 249 253 251 245 231 226 217 219 218 216 216 Remotes (Stand Alone Only) 781 786 752 733 680 651 631 630 630 626 625 Total Switches 1,492 1,458 1,441 1,414 1,363 1,351 1,336 1,337 1,334 1,326 1,325 Analog Stored Program Control 113 95 71 20 1 1 0 0 0 0 0 Digital Stored Program Control 1,379 1,363 1,370 1,394 1,362 1,350 1,336 1,337 1,334 1,326 1,325 Total Number Access Lines in Service (000) 16,132 16,859 17,449 17,626 16,664 15,682 14,277 13,425 12,817 12,082 11,258 Analog Stored Program Control Lines Served 4,228 3,574 2,501 636 30 28 0 0 0 0 0 Digital Stored Program Control Lines Served 11,905 13,286 14,948 16,991 16,634 15,654 14,277 13,425 12,817 12,082 11,258 Total Switches Equipped w/SS7-394 (InterLATA) Svc. 1,305 1,346 1,350 1,340 1,311 1,311 1,312 1,315 1,311 1,303 1,302 Total Switches Equipped with ISDN 541 557 583 623 603 587 635 638 636 852 854 Lines with Access to ISDN (000) 10,264 11,189 12,522 14,611 14,082 13,153 12,575 11,806 11,245 11,055 10,296 Basic Rate ISDN (BRI) Interfaces Equipped 162,953 165,733 167,623 176,696 174,079 199,302 201,232 195,674 195,729 193,070 192,754 Primary Rate ISDN (PRI) Interfaces Equipped 4,329 4,867 6,112 7,822 11,046 61,993 65,672 67,908 67,912 68,303 68,215 Source: ARMIS Report 43-07. Table 10.1 Switching Data Qwest Companies 10 - 11 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2,616 2,636 2,634 2,622 2,623 2,628 2,639 2,636 2,649 2,698 Tandems 67 74 76 81 87 102 101 100 100 98 Hosts 369 381 386 382 464 375 371 372 374 378 Remotes (Stand Alone Only) 1,405 1,437 1,435 1,424 1,424 1,441 1,445 1,438 1,447 1,501 Total Switches 2,652 2,682 2,683 2,675 2,682 2,705 2,702 2,712 2,719 2,758 Analog Stored Program Control 37 16 74443333 Digital Stored Program Control 2,615 2,666 2,676 2,671 2,677 2,701 2,699 2,709 2,716 2,755 Total Number Access Lines in Service (000) 40,838 41,833 41,669 40,582 38,810 38,003 36,105 33,520 30,734 28,078 Analog Stored Program Control Lines Served 1,442 568 218 112 55 67 60 54 48 45 Digital Stored Program Control Lines Served 39,396 41,266 41,451 40,469 38,754 37,936 36,045 33,466 30,686 28,034 Total Switches Equipped w/SS7-394 (InterLATA) Svc. 2,641 2,671 2,672 2,664 2,682 2,704 2,700 2,706 2,713 2,757 Total Switches Equipped with ISDN 1,298 1,304 1,305 1,303 1,328 1,308 1,289 1,301 1,295 1,295 Lines with Access to ISDN (000) 34,367 36,336 36,825 35,636 34,012 32,010 30,667 27,567 25,001 22,457 Basic Rate ISDN (BRI) Interfaces Equipped 1,088,060 1,167,022 1,226,934 1,258,543 1,003,709 966,634 1,015,554 996,472 933,795 950,386 Primary Rate ISDN (PRI) Interfaces Equipped 71,983 97,177 123,323 150,029 149,282 151,276 149,131 150,081 149,513 149,500 Source: ARMIS Report 43-07. Table 10.1 Switching Data Verizon - Bell Atlantic Companies 10 - 12 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 6,453 6,538 6,659 5,136 5,190 4,432 4,437 4,448 2,413 2,409 2,408 Tandems 165 162 164 150 151 136 134 135 100 101 101 Hosts 939 955 945 742 761 653 655 643 1,008 1,009 1,007 Remotes (Stand Alone Only) 1,960 2,738 2,861 2,088 2,134 2,108 2,115 2,115 1,344 1,340 1,342 Total Switches 6,483 6,604 6,691 5,174 5,235 4,470 4,473 4,481 2,426 2,423 2,422 Analog Stored Program Control 10 0 0 00000000 Digital Stored Program Control 6,305 6,604 6,691 5,174 5,235 4,470 4,473 4,481 2,426 2,423 2,422 Total Number Access Lines in Service (000) 18,321 19,105 20,015 18,709 18,503 16,894 16,366 15,785 14,131 13,187 12,207 Analog Stored Program Control Lines Served 197 0 0 00000000 Digital Stored Program Control Lines Served 17,966 19,105 20,015 18,709 18,503 16,894 16,366 15,785 14,131 13,187 12,207 Total Switches Equipped w/SS7-394 (InterLATA) Svc. 4,215 5,527 6,309 5,021 5,156 4,429 4,464 4,472 2,426 2,423 2,422 Total Switches Equipped with ISDN 779 1,246 1,385 884 913 950 974 971 879 886 888 Lines with Access to ISDN (000) 10,619 14,574 14,926 14,064 13,830 13,320 12,908 12,418 11,490 10,671 9,824 Basic Rate ISDN (BRI) Interfaces Equipped 126,946 139,471 167,964 173,507 173,220 169,320 163,107 163,005 192,137 191,655 196,621 Primary Rate ISDN (PRI) Interfaces Equipped 16,465 36,386 47,588 62,652 70,524 69,289 67,952 70,099 68,288 68,753 67,517 Source: ARMIS Report 43-07. Table 10.1 Switching Data Verizon - GTE Companies 10 - 13 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 Sheath Kilometers: Total Sheath Kilometers 5,664,315 5,763,419 5,846,319 5,683,568 5,848,516 5,791,105 5,851,790 5,940,199 5,987,524 6,079,810 6,201,565 Copper 5,163,039 5,212,873 5,255,778 5,063,534 5,166,537 5,086,669 5,118,314 5,166,481 5,166,382 5,184,980 5,218,430 Fiber 495,380 536,520 576,868 604,175 665,805 692,031 720,877 763,132 810,556 884,319 972,713 Other 5,896 14,026 13,672 15,860 16,174 12,406 12,600 10,587 10,585 10,511 10,422 Interoffice Working Facilities: Total Circuit Links 28,847,081 32,231,481 41,879,877 47,960,986 52,923,180 52,949,635 52,112,866 50,950,480 49,057,883 47,498,952 45,041,502 Loop Plant -- Central Office Terminations: Total Equipped Channels 264,429,362 291,636,650 316,611,286 330,593,158 358,698,149 312,233,882 297,583,679 300,722,796 279,689,571 281,237,051 283,548,392 Copper 230,903,175 239,252,059 242,631,789 245,096,715 252,260,939 244,927,670 238,212,199 235,623,927 234,032,989 234,866,729 236,712,665 Fiber Digital Carrier 33,515,370 52,379,288 73,974,959 85,492,486 106,433,399 67,303,642 59,370,412 65,098,642 45,656,354 46,370,079 46,835,485 Other 10,817 5,303 4,538 3,957 3,811 2,570 1,068 227 228 243 242 Total Working Channels 170,083,120 194,840,965 207,743,891 216,436,367 227,878,106 169,157,091 155,978,400 148,278,295 137,253,986 125,767,269 116,333,285 Copper 147,286,389 154,355,633 154,646,229 155,710,348 152,364,455 137,228,369 127,261,709 117,672,917 110,016,721 100,254,451 92,431,635 Fiber Digital Carrier 22,793,636 40,483,024 52,850,716 60,724,120 75,512,132 31,927,283 28,716,169 30,605,295 27,237,179 25,512,742 23,901,576 Other 3,095 2,308 246,946 1,899 1,519 1,439 522 83 86 76 74 Other Transmission Facility Data: Copper Pairs Term Main Frame (Loop Plant Only) 215,534,261 218,990,613 218,470,177 217,441,743 238,862,029 242,252,929 242,520,915 242,554,731 244,216,752 245,371,644 247,662,209 Fiber Strands Term in the CO (Loop Plant Only) 1,651,999 1,946,608 2,005,074 2,309,508 2,744,584 3,098,809 2,705,921 2,831,699 3,207,029 3,500,161 3,885,338 Fiber Term at Customer Premises DS1 Rate 363,189 506,572 629,237 876,058 1,290,658 1,325,187 1,710,437 1,839,676 1,960,213 2,375,890 2,384,068 Fiber Term at Customer Premises DS3 Rate & Higher 29,893 56,208 105,420 190,106 232,430 212,277 265,280 296,659 413,918 517,533 631,820 ISDN Capable Lines NA NA NA 116,839,259 105,443,488 106,355,653 96,011,618 86,199,947 82,043,344 76,775,728 71,754,688 NA: Not available Source: ARMIS Report 43-07. Table 10.2 Transmission System Data Total - All Companies 10 - 14 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 Sheath Kilometers: Total Sheath Kilometers 586,712 598,858 601,779 612,988 629,321 636,725 642,674 652,181 657,922 665,745 676,616 Copper 533,491 541,197 540,170 546,336 555,024 558,670 562,163 570,185 573,316 575,852 578,733 Fiber 52,450 56,687 60,637 65,632 73,334 77,084 79,541 81,711 84,319 89,607 97,598 Other 771 974 972 1,020 964 971 970 286 286 286 285 Interoffice Working Facilities: Total Circuit Links 4,118,183 4,912,927 5,990,907 6,753,643 7,625,684 8,084,023 7,633,513 7,372,538 7,241,746 7,129,563 6,609,155 Loop Plant -- Central Office Terminations: Total Equipped Channels 34,740,814 36,301,862 37,842,246 39,092,223 40,436,388 42,145,712 38,326,987 38,922,520 39,012,822 39,331,278 39,601,598 Copper 29,797,059 30,063,619 30,255,769 30,775,153 30,444,126 30,690,174 34,469,562 34,918,499 33,028,372 33,035,248 33,125,113 Fiber Digital Carrier 4,943,755 6,238,243 7,586,477 8,317,070 9,992,262 11,455,538 3,857,425 4,004,021 5,984,450 6,296,030 6,476,485 Other 000000000 00 Total Working Channels 21,152,075 21,782,557 22,227,572 22,495,633 21,786,411 20,997,868 20,239,795 19,291,809 18,052,604 16,644,117 15,229,343 Copper 19,082,995 19,216,231 19,135,507 18,993,978 18,124,703 17,272,552 18,147,879 17,221,055 15,038,891 13,668,393 12,359,444 Fiber Digital Carrier 2,069,080 2,566,326 3,092,065 3,501,655 3,661,708 3,725,316 2,091,916 2,070,754 3,013,713 2,975,724 2,869,899 Other 000000000 00 Other Transmission Facility Data: Copper Pairs Term Main Frame (Loop Plant Only) 28,970,660 29,303,138 29,605,539 30,212,004 29,938,625 30,208,945 30,632,552 30,761,065 30,795,573 30,872,199 30,938,676 Fiber Strands Term in the CO (Loop Plant Only) 123,302 141,621 165,171 205,342 275,069 300,927 248,340 265,087 283,612 311,376 344,339 Fiber Term at Customer Premises DS1 Rate 46,366 53,506 62,090 78,822 106,984 118,927 318,417 345,032 384,053 414,963 440,658 Fiber Term at Customer Premises DS3 Rate & Higher 4,453 5,145 5,788 7,188 9,583 10,810 26,849 35,916 41,763 52,558 73,292 ISDN Capable Lines NA NA NA 9,469,137 9,054,353 8,618,397 8,050,722 7,567,384 6,926,378 6,615,363 5,869,237 NA: Not available Source: ARMIS Report 43-07. Table 10.2 Transmission System Data AT&T Ameritech Companies 10 - 15 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 Sheath Kilometers: Total Sheath Kilometers 1,050,186 1,074,896 1,094,569 1,115,897 1,134,363 1,145,506 1,155,144 1,170,351 1,187,686 1,206,054 1,227,344 Copper 951,758 965,108 973,995 983,221 989,541 992,446 994,980 1,000,413 1,003,470 1,005,800 1,010,354 Fiber 96,852 105,335 116,507 129,209 141,356 149,609 156,707 166,476 180,754 196,813 213,561 Other 1,576 4,453 4,067 3,466 3,466 3,452 3,457 3,462 3,462 3,441 3,429 Interoffice Working Facilities: Total Circuit Links 6,107,816 6,134,728 8,564,658 9,828,726 10,690,256 10,835,682 10,539,995 10,306,408 10,211,775 10,211,260 9,634,752 Loop Plant -- Central Office Terminations: Total Equipped Channels 39,550,588 40,957,871 42,025,575 38,493,186 39,191,848 39,822,163 39,957,594 40,455,852 40,680,315 40,696,573 41,601,595 Copper 31,270,774 31,917,878 31,849,537 31,600,665 31,708,156 30,263,142 30,684,759 29,089,610 28,874,470 29,026,401 30,094,308 Fiber Digital Carrier 8,278,972 9,039,151 10,175,104 6,891,115 7,481,596 9,557,876 9,272,835 11,366,242 11,805,845 11,670,172 11,507,287 Other 842 842 934 1,406 2,096 1,145 0 0 0 0 0 Total Working Channels 27,921,162 29,836,968 30,422,706 26,262,694 25,989,359 25,039,974 24,334,185 23,426,354 22,237,045 20,660,819 19,532,735 Copper 20,708,890 21,233,672 21,237,643 20,311,329 19,664,164 17,250,216 16,854,022 14,456,834 13,286,993 12,258,177 11,652,888 Fiber Digital Carrier 7,212,190 8,603,214 9,184,935 5,950,949 6,324,563 7,789,007 7,480,163 8,969,520 8,950,052 8,402,642 7,879,847 Other 82 82 128 416 632 751 0 0 0 0 0 Other Transmission Facility Data: Copper Pairs Term Main Frame (Loop Plant Only) 26,703,438 27,082,625 26,602,864 31,771,617 48,789,643 49,853,210 51,027,738 52,265,386 53,401,516 54,143,046 55,838,372 Fiber Strands Term in the CO (Loop Plant Only) 157,957 185,416 205,840 226,360 248,433 310,092 322,590 351,606 391,378 417,140 430,450 Fiber Term at Customer Premises DS1 Rate 36,911 50,431 67,886 85,205 93,687 593,755 448,233 474,787 514,177 705,099 587,970 Fiber Term at Customer Premises DS3 Rate & Higher 6,847 8,974 35,492 94,022 107,998 112,931 121,680 129,894 140,319 144,903 150,697 ISDN Capable Lines NA NA NA 13,111,821 12,636,844 16,230,309 16,065,806 15,764,831 15,739,843 15,543,607 15,381,048 NA: Not available Source: ARMIS Report 43-07. Table 10.2 Transmission System Data AT&T BellSouth Companies 10 - 16 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 Sheath Kilometers: Total Sheath Kilometers 363,726 368,122 363,304 386,093 394,058 382,326 394,103 409,245 414,009 420,469 427,498 Copper 339,207 341,563 334,493 355,133 359,288 343,317 352,331 365,700 367,675 370,524 372,936 Fiber 23,375 25,416 27,648 29,797 33,227 37,466 40,279 43,342 46,131 49,742 54,359 Other 1,144 1,144 1,163 1,163 1,543 1,543 1,493 203 203 203 203 Interoffice Working Facilities: Total Circuit Links 3,369,967 3,760,855 4,352,282 5,032,433 5,141,975 4,792,666 4,649,070 4,410,421 4,297,813 4,030,874 3,646,767 Loop Plant -- Central Office Terminations: Total Equipped Channels 28,635,080 29,739,661 30,729,411 33,317,471 34,687,259 34,988,223 31,628,755 32,005,987 32,281,694 32,987,431 33,152,037 Copper 27,548,645 28,348,883 29,062,676 31,479,491 32,170,875 32,337,338 30,161,010 30,398,583 30,545,581 31,179,398 31,319,173 Fiber Digital Carrier 1,086,411 1,390,754 1,666,523 1,837,699 2,516,055 2,650,609 1,467,745 1,607,404 1,736,113 1,808,033 1,832,864 Other 24 24 212 281 329 276 0 0 0 0 0 Total Working Channels 18,254,128 20,103,518 20,963,786 23,081,376 22,773,561 22,080,915 17,868,331 17,311,070 16,684,641 16,235,342 15,503,872 Copper 17,569,012 19,235,044 19,936,233 21,930,468 21,380,638 20,803,417 17,070,393 16,430,928 15,733,399 15,256,737 14,538,480 Fiber Digital Carrier 685,092 868,450 1,027,425 1,150,752 1,392,728 1,277,338 797,938 880,142 951,242 978,605 965,392 Other 24 24 128 156 195 160 0 0 0 0 0 Other Transmission Facility Data: Copper Pairs Term Main Frame (Loop Plant Only) 25,412,880 25,953,289 26,639,408 27,102,231 27,403,873 27,620,878 27,668,068 27,754,848 27,851,112 27,904,707 27,917,036 Fiber Strands Term in the CO (Loop Plant Only) 88,192 97,385 101,516 115,670 139,598 182,250 49,626 51,419 53,554 71,404 77,774 Fiber Term at Customer Premises DS1 Rate 762 854 894 0 0 0 244,193 265,797 293,775 320,502 344,366 Fiber Term at Customer Premises DS3 Rate & Higher 6,145 7,432 9,456 13,132 16,805 19,925 23,252 29,988 40,059 57,074 86,600 ISDN Capable Lines NA NA NA 15,930,217 14,563,646 15,240,270 8,870,683 8,272,400 8,000,416 7,702,746 7,399,776 NA: Not available Source: ARMIS Report 43-07. Table 10.2 Transmission System Data AT&T Pacific Telesis Companies 10 - 17 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 Sheath Kilometers: Total Sheath Kilometers 78,634 79,230 77,061 77,879 78,720 79,373 81,872 Copper 68,582 68,786 66,119 66,717 67,166 67,320 68,514 Fiber 10,052 10,444 10,810 11,076 11,468 11,967 13,272 Other 0 0 132 86 86 86 86 Interoffice Working Facilities: Total Circuit Links 701,243 720,401 843,381 781,235 788,726 716,423 642,649 Loop Plant -- Central Office Terminations: Total Equipped Channels 4,719,268 4,627,977 4,747,002 4,841,846 4,879,686 4,906,370 4,991,007 Copper 3,991,935 4,018,081 4,009,459 4,042,100 4,059,897 4,079,481 4,151,464 Fiber Digital Carrier 727,333 609,896 737,543 799,746 819,789 826,889 839,543 Other 00000 00 Total Working Channels 2,551,112 2,540,750 2,296,050 2,193,809 2,065,238 1,916,094 1,792,444 Copper 2,064,154 2,140,299 1,876,364 1,768,509 1,633,650 1,494,059 1,384,647 Fiber Digital Carrier 486,958 400,451 419,686 425,300 431,588 422,035 407,797 Other 00000 00 Other Transmission Facility Data: Copper Pairs Term Main Frame (Loop Plant Only) 4,108,736 3,892,983 3,860,982 3,869,497 3,882,583 3,886,453 3,949,600 Fiber Strands Term in the CO (Loop Plant Only) 60,062 89,466 24,006 26,986 28,476 31,948 33,585 Fiber Term at Customer Premises DS1 Rate 0 67,790 33,818 31,586 34,120 36,397 37,360 Fiber Term at Customer Premises DS3 Rate & Higher 0 0 6,182 4,092 4,676 5,855 6,750 ISDN Capable Lines 384,431 398,824 1,049,395 990,236 915,442 834,992 781,888 NA: Not available Source: ARMIS Report 43-07. Table 10.2 Transmission System Data AT&T Southern New England Tel. 10 - 18 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 Sheath Kilometers: Total Sheath Kilometers 685,526 700,914 715,915 734,982 749,279 758,096 768,714 777,213 789,941 805,582 820,126 Copper 622,960 634,236 645,280 657,915 665,754 671,033 678,357 684,030 691,016 697,110 701,560 Fiber 60,561 66,074 70,023 76,442 82,893 86,431 89,725 92,549 98,293 107,840 117,936 Other 2,005 604 612 625 632 632 632 634 632 632 630 Interoffice Working Facilities: Total Circuit Links 3,374,225 4,013,947 5,040,973 5,747,378 6,133,750 6,011,924 6,248,497 6,238,881 6,079,908 6,082,489 5,705,015 Loop Plant -- Central Office Terminations: Total Equipped Channels 26,003,155 26,573,984 27,781,986 28,466,090 33,579,340 35,090,790 30,806,704 31,676,407 32,267,999 33,003,479 33,424,292 Copper 24,957,200 25,399,685 26,437,109 27,047,348 30,533,897 31,634,863 26,115,730 26,629,079 27,047,559 27,460,575 27,772,659 Fiber Digital Carrier 1,045,955 1,174,299 1,344,877 1,418,742 3,045,443 3,455,927 4,690,974 5,047,328 5,220,440 5,542,904 5,651,633 Other 000000000 00 Total Working Channels 16,305,661 17,626,797 17,857,937 18,053,445 16,482,996 15,888,373 15,236,915 14,528,841 13,592,535 12,784,143 12,000,269 Copper 15,532,286 16,738,819 16,854,720 16,970,439 15,386,074 14,767,650 12,653,096 11,827,658 10,930,772 10,103,935 9,368,928 Fiber Digital Carrier 773,375 887,978 1,003,217 1,083,006 1,096,922 1,120,723 2,583,819 2,701,183 2,661,763 2,680,208 2,631,341 Other 000000000 00 Other Transmission Facility Data: Copper Pairs Term Main Frame (Loop Plant Only) 22,926,817 22,904,300 23,579,244 24,032,521 24,062,333 24,290,865 24,407,172 24,749,958 24,958,917 25,087,864 25,196,529 Fiber Strands Term in the CO (Loop Plant Only) 193,409 206,178 158,881 256,736 329,584 388,011 161,950 172,172 183,440 214,567 233,962 Fiber Term at Customer Premises DS1 Rate 77,545 113,701 103,739 130,287 160,740 172,872 273,498 307,114 339,744 372,277 398,300 Fiber Term at Customer Premises DS3 Rate & Higher 5,039 5,615 1,995 3,668 4,523 4,828 20,354 26,529 33,048 43,517 64,951 ISDN Capable Lines NA NA NA 12,168,819 12,055,812 11,177,094 4,981,445 4,680,190 4,351,990 4,022,549 3,797,474 NA: Not available Source: ARMIS Report 43-07. Table 10.2 Transmission System Data AT&T Southwestern Bell Companies 10 - 19 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 Sheath Kilometers: Total Sheath Kilometers 717,084 722,157 735,920 754,162 762,412 770,660 779,623 789,965 798,298 805,576 812,728 Copper 653,205 650,929 662,816 675,009 676,615 684,193 690,414 698,213 704,670 709,450 713,398 Fiber 63,880 65,171 66,986 69,906 76,585 80,891 83,638 86,182 88,058 90,582 93,844 Other 0 6,057 6,119 9,247 9,212 5,576 5,570 5,570 5,570 5,544 5,486 Interoffice Working Facilities: Total Circuit Links 3,561,748 4,129,315 5,232,282 6,152,970 6,926,823 7,018,987 6,746,390 6,521,359 6,262,916 6,178,945 6,027,173 Loop Plant -- Central Office Terminations: Total Equipped Channels 24,893,900 27,316,968 28,023,288 28,733,473 29,643,140 30,106,628 30,149,357 30,254,149 30,524,455 30,600,052 30,623,869 Copper 23,193,518 25,517,759 25,361,821 25,581,184 25,939,651 26,077,832 25,727,523 25,545,943 25,653,793 25,462,364 25,313,865 Fiber Digital Carrier 1,699,888 1,799,003 2,661,211 3,152,009 3,703,244 4,028,568 4,421,607 4,707,979 4,870,434 5,137,445 5,309,762 Other 494 206 256 280 245 228 227 227 228 243 242 Total Working Channels 17,195,446 17,455,809 18,011,061 18,009,155 17,058,921 16,260,389 15,607,156 15,038,312 14,301,144 13,388,731 12,260,905 Copper 16,113,600 16,222,185 16,270,241 15,887,131 14,607,962 14,400,788 13,625,667 12,996,038 12,286,229 11,417,937 10,376,620 Fiber Digital Carrier 1,081,695 1,233,523 1,740,715 2,121,920 2,450,864 1,859,511 1,981,407 2,042,191 2,014,829 1,970,718 1,884,211 Other 151 101 105 104 95 90 82 83 86 76 74 Other Transmission Facility Data: Copper Pairs Term Main Frame (Loop Plant Only) 20,463,591 21,558,602 21,606,866 21,572,942 21,653,395 21,724,140 22,858,456 22,907,836 23,069,191 23,111,778 23,160,917 Fiber Strands Term in the CO (Loop Plant Only) 123,691 174,430 202,329 238,802 299,315 309,154 316,793 322,781 436,786 449,883 477,094 Fiber Term at Customer Premises DS1 Rate 46,296 91,105 136,878 267,251 316,665 349,948 370,416 390,835 156,616 262,659 280,150 Fiber Term at Customer Premises DS3 Rate & Higher 1,142 6,085 28,354 38,224 51,546 60,366 63,678 66,830 103,926 155,706 180,303 ISDN Capable Lines NA NA NA 9,922,088 9,012,052 8,426,381 7,591,314 7,191,782 7,047,818 6,569,964 5,976,121 NA: Not available Source: ARMIS Report 43-07. Table 10.2 Transmission System Data Qwest Companies 10 - 20 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 Sheath Kilometers: Total Sheath Kilometers 992,970 1,008,405 1,022,395 1,038,094 1,046,999 1,080,551 1,088,452 1,095,801 1,119,400 1,146,396 1,176,244 Copper 873,583 876,739 879,768 886,323 886,147 912,134 914,932 917,525 918,542 921,753 923,263 Fiber 118,987 130,872 141,888 151,432 160,494 168,185 173,174 177,930 200,512 224,324 252,678 Other 401 794 739 339 357 232 346 346 346 319 303 Interoffice Working Facilities: Total Circuit Links 5,853,744 6,834,238 8,693,801 10,262,940 11,001,835 11,120,804 11,201,109 11,045,592 10,245,898 9,334,622 9,083,841 Loop Plant -- Central Office Terminations: Total Equipped Channels 80,327,245 99,291,295 107,609,086 118,262,278 132,282,141 83,370,102 81,140,923 83,703,872 74,494,204 74,651,191 74,710,204 Copper 66,426,101 69,763,421 69,783,996 70,380,468 71,028,549 65,274,338 64,992,904 65,921,886 63,212,555 63,265,368 63,241,418 Fiber Digital Carrier 13,901,144 29,527,874 37,825,090 47,881,810 61,253,592 18,095,764 16,148,019 17,781,986 11,281,649 11,385,823 11,468,786 Other 000000000 00 Total Working Channels 48,600,177 66,109,986 74,269,449 84,300,998 97,520,356 44,619,456 40,052,063 38,588,203 34,792,533 31,773,083 28,651,242 Copper 39,429,529 41,983,369 43,003,921 43,790,217 43,770,856 34,803,810 32,820,501 31,437,854 28,203,411 25,736,621 23,208,189 Fiber Digital Carrier 9,170,648 24,126,617 31,265,528 40,510,781 53,749,500 9,815,646 7,231,562 7,150,349 6,589,122 6,036,462 5,443,053 Other 000000000 00 Other Transmission Facility Data: Copper Pairs Term Main Frame (Loop Plant Only) 61,342,895 61,875,146 61,342,016 60,962,933 60,979,463 62,622,453 62,718,766 63,581,514 61,299,439 61,353,678 61,354,275 Fiber Strands Term in the CO (Loop Plant Only) 872,210 1,014,974 1,127,598 1,227,204 1,359,225 1,487,203 1,552,120 1,601,097 1,787,476 1,959,428 2,241,896 Fiber Term at Customer Premises DS1 Rate 131,829 192,129 246,434 314,204 612,368 21,723 21,693 22,149 231,749 257,588 288,623 Fiber Term at Customer Premises DS3 Rate & Higher 4,094 18,518 24,111 32,912 40,995 2,778 2,715 2,639 33,768 41,731 52,530 ISDN Capable Lines NA NA NA 38,205,741 35,587,450 34,658,178 33,659,351 31,478,816 27,823,308 25,493,902 22,994,661 NA: Not available Source: ARMIS Report 43-07. Table 10.2 Transmission System Data Verizon - Bell Atlantic Companies 10 - 21 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 Sheath Kilometers: Total Sheath Kilometers 1,268,110 1,290,068 1,312,437 1,041,353 1,053,450 938,012 946,019 967,564 941,548 950,615 979,137 Copper 1,188,835 1,203,101 1,219,257 959,596 965,586 856,090 859,017 863,698 840,527 837,171 849,672 Fiber 79,275 86,966 93,180 81,757 87,864 81,922 87,002 103,866 101,021 113,444 129,465 Other 000000000 00 Interoffice Working Facilities: Total Circuit Links 2,461,398 2,445,471 4,004,974 4,182,896 4,701,614 4,365,148 4,250,911 4,274,046 3,929,101 3,814,776 3,692,150 Loop Plant -- Central Office Terminations: Total Equipped Channels 30,278,580 31,455,009 42,599,694 44,228,437 44,158,765 42,082,287 40,826,357 38,862,163 25,548,396 25,060,677 25,443,790 Copper 27,709,878 28,240,814 29,880,881 28,232,406 26,443,750 24,631,902 22,051,252 19,078,227 21,610,762 21,357,894 21,694,665 Fiber Digital Carrier 2,559,245 3,209,964 12,715,677 15,994,041 17,713,874 17,449,464 18,774,264 19,783,936 3,937,634 3,702,783 3,749,125 Other 9,457 4,231 3,136 1,990 1,141 921 841 0 0 0 0 Total Working Channels 20,654,471 21,925,330 23,991,380 24,233,066 23,715,390 21,729,366 20,343,905 17,899,897 15,528,246 12,364,940 11,362,475 Copper 18,850,077 19,726,313 18,207,964 17,826,786 17,365,904 15,789,637 14,213,787 11,534,041 12,903,376 10,318,592 9,542,439 Fiber Digital Carrier 1,801,556 2,196,916 5,536,831 6,405,057 6,348,889 5,939,291 6,129,678 6,365,856 2,624,870 2,046,348 1,820,036 Other 2,838 2,101 246,585 1,223 597 438 440 0 0 0 0 Other Transmission Facility Data: Copper Pairs Term Main Frame (Loop Plant Only) 29,713,980 30,313,513 29,094,240 21,787,495 21,925,961 22,039,455 19,347,181 16,664,627 18,958,421 19,011,919 19,306,804 Fiber Strands Term in the CO (Loop Plant Only) 93,238 126,604 43,739 39,394 33,298 31,706 30,496 40,551 42,307 44,415 46,238 Fiber Term at Customer Premises DS1 Rate 23,480 4,846 11,316 289 214 172 169 2,376 5,979 6,405 6,641 Fiber Term at Customer Premises DS3 Rate & Higher 2,173 4,439 224 960 980 639 570 771 16,359 16,189 16,697 ISDN Capable Lines NA NA NA 18,031,436 12,148,900 11,606,200 15,742,902 10,254,308 11,238,149 9,992,605 9,554,483 NA: Not available Source: ARMIS Report 43-07. Table 10.2 Transmission System Data Verizon - GTE Companies 10 - 22