| 摘要 |
<p>A cellular terminal adapted to connect a telephone communication device to a cellular telephone network, which terminal includes a transmitter periodically sending a registration signal to the network and a receiver receiving acknowledgement signals sent by the cellular telephone network in response to the registration signals. A counter records the number of consecutive acknowledgement signals not timely received by the cellular terminal (incrementally increasing each time a signal is not timely received, and resetting to zero when a signal is received), with corrective action being initiated to reestablish proper connection between the cellular terminal and the cellular telephone network when the number recorded by the counter exceeds a selected threshold number. Continuous verified interaction of the cellular terminal and cellular telephone network is provided by (1) sending periodic registration messages from the cellular terminal to the cellular telepnone network, (2) sending acknowledgement signals from the network to the terminal in response to registration messages, (3) counting the number of consecutive acknowledgement signals not timely received by the cellular terminal, and (4) initiating correction of a failure of interaction of the cellular terminal and cellular telephone network when the counted number of consecutive acknowledgement signals not timely received reaches a selected threshold number. Corrective action may be initiated by signalling an error condition to a user of the fixed cellular terminal and/or by generating an instruction signal causing the fixed cellular terminal to reset.</p> |
