| 摘要 |
PURPOSE:To increase the efficiency for incoming transfer and thus improve the service, by securing an effective use of a memory device by the information produced by a jumper as well as the pseudo storage information and thus eliminating an installation of a device exclusive for service of the incoming transfer. CONSTITUTION:Two terminals T1 and T2 are provided at the storage position of the main frame LINK that stores the subscriber SUB to receive the incoming service, and the call switch device SWU functioning as a master/slave circuit is connected between the terminals T1 and T2. The master terminal T1 of the device SWU is connected to the subscriber circuit L, and the terminal T2 is connected to the transfer device TFEC via the call waiting link CWL. Then the transfer translator TFTLR and the transfer service control register TFCR are connected to the transfer device TFEC. Thus in case the subscriber SUB has no incoming request, the slave terminal T2 is set under the busy state to perform a general call through the terminal T1. While in case the SUB has an incoming request, the terminal T1 is put under the busy state only at the time of incoming with the busy state of T2 cancelled. Then the call is connected by the device TFEC. |
