| 摘要 |
PURPOSE:To eliminate the need for a caller to make dial operation again by selecting a called party one after another from a group of subscribers in a prescribed order when the busy state and no response state for a prescribed time are detected. CONSTITUTION:When a call time exceeds a prescribed time, the content of a translation table TLR is a jump address JA and a service class SC as shown in Fig. (b). The JA is coincident with several lines of addresses of a transfer memory BTFM in the table TLR and the memory BTFM is read by adding a partial address to the JA. When dialing is finished, the partial address is added to the upper rank of a subscriber number of the called party and the number is translated and the SC and a device number FqNo is converted into the JA. When the service class SC is a transfer service, the process is skipped to the processing routine, the partial address is added to the upper rank of the JA and the content of the memory BTFM is read. Then, the number EqNo and a jump address aij are read and a caller is transmitted by using the EqNo. When the call time exceeds a prescribed time, the partial address is added to the upper rank of the aij read from the BTFM and further, the BTFM is read. The said processing is repeated similarly as to the device number EqNo' and the address aij' of the subscriber. |
