Mobile telephone system, two communication paths between base station and control station

摘要

mobile telephone system includes a base transceiver station (BTS). This provides radio communication with a mobile handset MS and also communicates with a control station (BSC) through a communication link in the form of a leased line which provides a communications path P1. This path P1 has a predetermined bandwidth for signals between the BTS and BSC. An ISDN is used to provide a selectively connectable second communication path P2 between the BTS and BSC to augment the bandwidth available for the signals during periods of peak demand. In order to accommodate different call connection times in the system through the leased line and the ISDN, the BSC/BTS are arranged to produce call connection signals (CLI1, CLI2) that initiate billing at the same time irrespective of the path P1, P2 used to make the call connection.