| 摘要 |
PURPOSE:To prevent call identification information from being overlapped at the time of moving a communication equipment by storing the selected call identification information and the number of a held call while making them correspondent with each other and restarting communication when the call identification information having the same value as the designated call identification information is present thereon. CONSTITUTION:The interrupted message processing part 206 of a private branch exchange 200 judges whether the call identification information in the interrupted message transmitted from a terminal equipment is present or not. When the call identification information is present thereon, the call identification information included in the interrupted message is stored in a storage part 209 corresponding to the number of the held call, and a holding tone is transmitted from a holding tone source 210 to the terminal equipment. When a restarting message is received from the terminal equipment, a restarting message processing part 207 retrieves the storage part 209 and when the call identification information having the same value as the call identification information included in the restarting message is present, the restart confirming message is transmitted to obtain a communication state. Thus, the call identification information can be prevented from being overlapped at the time of moving the communication equipment. |
