Ringing Ceders

Mobile telephone facilities tie in with the normal fixed position telephone system, however base units can be owned by a Radio Common Carrier (RCC).  The mobile re-scans every seven seconds to buy cell phone records or when signal strength drops before a pre-determined level.  If the mobile gets the right channel and SAT but in a different cell than intended, FM capture occurs, where the stronger call on the frequency will displace, at least temporarily, the weaker call.  FDMA is a basic technology in the analog advanced mobile phone service (AMPS), the most widely-installed cellular phone system installed in North America.  AMPS is the analog mobile phone system standard used today by most cellular alarm communicators.