Mobile telephone system having message recording mode of operation during failures

Abstract From the Canadian patent

In a mobile telephone system a base station establishes a radio link to a mobile station and a connection to a switched telephone network when the mobile station is in communication with a network-side station. The base station constantly monitors signals from the mobile station over the radio link. If it detects that the radio link is failing during a communication, a prerecorded announcement is transmitted to the network-side station. A recording/playback apparatus is then operated to record a message from the distant station. The base station further includes a ringing detector for detecting a ringing signal from the network. A connection is then established to the network from the base …