WMTS: The U.S. Food and Drug Administration (FDA) and the Association for the Advancement of Medical Instrumentation (AAMI) to petition the U.S. Federal Communications Commission (FCC) for a band dedicated exclusively to medical telemetry, resulting in the creation of the WMTS. The first dedicated wireless medical service was the WMTS. In June 2000, the Federal Communications Commission (FCC) in United States defined what is called Wireless Medical Telemetry Service (WMTS) that allows potentially life -critical equipment to operate on an interference-protected basis Prior to establishing the Wireless Medical Telemetry Service (WMTS), medical telemetry devices operated on an unlicensed basis on vacant television channels 7-13 (174-216 MHz) and 14-46 (470-668 MHz) or on a licensed, but secondary basis to private land mobile devices in the 450-470 MHz band. This meant that wireless telemetry devices had to accept interference from the television broadcasters and private land mobile licensees.[3] Concerns over additional interference to medical telemetry devices became a greater issue as the transition from analog to digital television began. To help alleviate additional interference to wireless medical telemetry devices, in 1999, a high-definition television (HDTV) station performed a system test near Baylor University Medical Center in Dallas, Texas. This test broadcast was in the same band as the hospitals medical telemetry, and it rendered some of the single-channel telemetry monitors inoperable. The FCC took action to establish the Wireless Medical Telemetry Service (WMTS) in 2002 by allocating 14 MHz of spectrum for wireless medical telemetry.[1]LicensingThe Wireless Medical Telemetry Service (WMTS) is licensed by rule. Licensed by rule means an individual license is not required to operate a WMTS device. The FCC service rules for the Wireless Medical Telemetry Service (WMTS) are located in 47 C.F.R part 95. [2]ChannelsThere arefour Wireless Medical Telemetry Service (WMTS) channelsin the 608-614 MHz band.No specificWMTS channelsare specified in the 1395-1400 MHz and 1427-1432 MHz bands. TheWMTS spectrum is divided into three spectrum blocks: 608 614 MHz: This spectrum band corresponds to television channel 37, but it is not used by any TV station because it is used for radio astronomy. 1395 1400 MHz 1427 1432 MHz: The channels in this spectrum band are shared by WMTS devices and non-WMTS devices such as utility telemetry devices. Generally, WMTS devices have primary status in the 1427 1429.5 MHz segment and non-WMTS devices have primary status in the 1429.5-1432 MHz segment, butthere are seven geographical areas where WMTS and non-WMTS statuses are flippedand WMTS devices have primary status in the 1429-1431.5 MHz segment and non-WMTS devices have primary status in the other segments of the band.CharacteristicsFrequency Bands : 608-614 MHz 1395-1400 MHz 1429-1432 MHzBandwidth : 6 MHsData Rate : 76 KbpsMultiple Access : CSMA/CA,PollingTransmission Power : >=10dBm and