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WASHINGTON, DC 20510 
Tom Wheeler 
Chairman 
Federal Communications Commission 
445 12th Street SW 
Washington, DC 20554 
Dear Chairman Wheeler, 
August 5, 2015 
We are writing to request a three month delay in the Commiss ion 's consideration of teclmical 
rules for the use of Channel 37 by unlicensed TV White Space ("TVWS") devices. Because the 
availability of Channel 37 for use by unlicensed devices has already been determined , a three 
month delay in establishing teclmical rul es would not impact the timing or pla1ming for the 
incentive auction. It is imperative that the Commission establish fully adequate teclmical rules 
for sharing, as those rules wi ll impact the safety and use of critical medical monitoring 
technology fo r hospitals. We strongl y urge you to give the medical technology stakeholders and 
the unlicensed community more time to work out a technical sharing agreement that will 
maintain the safe use of all devices in Channel 37. 
Wireless medical telemetry service ("WMTS") systems for cardiac and fetal monitoring in 
hospitals have long used Chanel 37 to operate without interference, which could severely impact 
patient health and safety. Hospitals and professionals rely on WMTS every second of every day 
to keep patients al ive and safe. It is essential that WMTS devices can continue to operate 
without any interference from TVWS devices. As such, we urge you to give fu ll and fair 
consideration to the comments submitted by more than 150 hospitals in over 40 states, as well as 
many nurses and other medical professionals, regarding the critical nature and substantial 
benefits of WMTS. The record also includes the results ofreal-world testing at three different 
hospitals demonstrating that interference to WMTS systems will be caused by a TVWS devices 
operating at the initial power-levels and distances proposed by the Commission. 
We are encouraged that the WMTS Coalition and the unlicensed community have been working 
together to establi sh criteria that could be adopted by the Commission for when, where, and how 
unlicensed TVWS devices could operate on Channel 37, while ensuring that safety of life 
WMTS systems are not interfered with. We believe that this type of cooperation should be 
encouraged, and the parties should be given the time they need to arrive at a mutually agreed 
upon solution that protects WMTS systems and allows unlicensed TVWS devices to proliferate 
to the maximum extent technically possible around hospitals. 
The Commission should not to rush the highly technical decisions regarding sharing of Channel 
37, particularly when patient safety is at issue and when a short delay to enable continued 
stakeholder discussions would not delay the start date of the auction. Therefore, we ask you to 
remove consideration of the Channel 3 7 issues from the Repo11 and Order in the Pait 15 
Rulemaking that will be considered at the Commission 's August Open Meeting in order to give 
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the stakeholders at least tluˇee more months to forge an industry so lution that protects patients 
while enabling the safe use ofTVWS devices . 
'l. i.ut l~+y Baldwin 
Uruted States Senator 
Sincerely, 
......,-""'""1y Klobuchar 
U nited States Senator 
Debbie Stabenow 
United States Senator 
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