| 摘要 |
A dual signaling channel telephone system that in addition to the conventional wire channel between the subscriber telephone set and the central office switch, includes a wireless signaling channel between the subscriber telephone set and a central platform. This second wireless channel is aimed to transmit status, control information or to send any type of information from external systems, such as e-mail and voice-mail systems, to the subscriber to activate optical or acoustic indications or message display on the subscriber telephone set or external devices.
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