| 摘要 |
PURPOSE:To check easily a call state in an automatic switchboard by using the same junction line, by performing maintenace control information transfer and switching to a subscriber's circuit in the remote maintenance system of an automatic switchboard. CONSTITUTION:When a switching control signal is sent to switchboard-side maintenance controller 202 via junction line 208 through the operation on maintenance console panel 206, a connection with optional subscriber's circuit 201 in automatic switchboard 200 is made with the switching control signal. Meanwhile, panel 206 is connected to push-button dial telephone set 207 connected to maintenance console panel side controller 205. Then, a dial pulse signal from telephone set 207 is sent to circuit 201 via controller 205, modem device 204, junction line 208, and switchboard-side modem device 202 to inspect the call state in switchboard 200 after maintenance control information transfer. Thus, the call state in the automatic switchboard after the maintenance control information transfer is easily inspected by using the same junction line. |
