| 摘要 |
PURPOSE:To enable response from either both extensions, by transmitting a callout signal to a transferred extension, if a nonresponse transfer set extension does not respond within a preset time, in a telephone exchanger. CONSTITUTION:Assuming that a subscriber B is in a nonresponse transfer setting state and the transferred extension is registed in a subscriber C. If a subscriber B does not respond to a call from a subscriber B within a preset time, a central controller CC forms a link 4 and transmits a callout signal to the subscriber C. The central controller CC monitors the response of both the subscribers B and C and enables the both to an incoming call from the subscribers B and C. |
