SMR (specialized mobile radio
) services, which, for the most part, serve the needs of commercial fleets in the field, can also be used for data transmissions, though their chief purpose is the provision of dispatch services.
Telecommunications leases generally fall into five categories: small rooftop antennas, used in conjunction with technologies such as cellular telephones, PCS or personal communications services antennas (the new digital successors to cell phones) and specialized mobile radio
(private dispatching service); larger rooftop antennas, often providing satellite reception and transmission for tenants; antenna towers, which broadcast radio and television signals as well as being locations for cellular and PCS signals; communications closets; and wiring "smart" buildings to facilitate high-speed Internet access and data transmission, better cable television service and discounted telephone service.
The membership of the association has been expanded to cover all Commercial Mobile Radio Service providers, including cellular personal communications services, enhanced specialized mobile radio
and mobile satellite services.
When a PSAP receives an emergency call from a wireless location (using cellular, PCS, or Specialized Mobile Radio
[ESMR] technology), neither ANI nor ALI information is available to the call taker.
Some of the providers seeking sites include Specialized Mobile Radio
(SMR) or Enhanced Specialized Mobile Radio
(ESMR) that provides service for vehicles and their business, paging operations, and fixed wireless services.