| 摘要 |
PURPOSE:To secure the information of the telephone number of the caller for the absent subscriber by his request who receives the information of the incoming by his pocket bell. CONSTITUTION:In case the subscriber of mobile telephone B' gets off the car, telephone B' is hooked off. Thus radio base station MBS receives it and then transmits the call signal to car exchange AMC via control channel C-CH and radio circuit control station MCS. Cental control unit CC1 gives an indication to MBS based on the calling information, and then sets up the channel from telephone B' to AMC via MBS and talking channel S-CH. And in case the subscriber dials the special number showing the absence via the telephone, the absence information is written into subscriber data memory DR of home memory station HMO from unit CC1 via the common signal line. When telephone B' receives the incoming, AMC identifies the absence by memory DR of HMO and then gives no general galling but gives the absence service, i.e., calls out the pocket bell carried with the subscriber to receive the information through other telephone. |
