The basic exchange telephone radio service or BETRS is a fixed radio service where a multiplexed, digital radio link is used as the last segment of the local loop to provide wireless telephone service to subscribers in remote areas. BETRS technology was developed in the mid-1980s and allows up to four subscribers to use a single radio channel pair, simultaneously, without interfering with one another.
In the US, this service may operate in the paired 152/158 and 454/459 MHz bands and on 10 channel blocks in the 816-820/861-865 MHz bands. BETRS may be licensed only to state-certified carriers in the area where the service is provided and is considered a part of the public switched telephone network (PSTN) by state regulators.
Regulation of this service currently resides in parts 1 and 22 of the Code of Federal Regulations (CFR), Subtitle 47 on Telecommunications, and may be researched or ordered through the Government Printing Office (GPO).