| 摘要 |
A door box call forwarding system includes a door box (10) having associated therewith a speaker (16) and a microphone (14). The doorbell (18) is operable to be depressed and transmit a signal to a control station (26). The control station (26) includes a processing unit (36) which is operable in a normal operating mode to effect a voice channel with auxiliary stations (28). In a remote mode, the processing unit (36) is operable to retrieve from a lookup table the phone number of a remote residence (32). Upon receiving a command from the door box (10) that the doorbell (18) has been depressed, the remote location (32) is accessed by dialing the phone number stored in the lookup table and, upon detecting an off-hook condition, effecting a voice channel between the door box (10) and the telephone at the remote location (32). The telephone at the remote location (32) can be utilized to transmit control signals to the processor unit (36) to perform select operations such as activating a remote latch (20). Further, the processor unit (36) can access the telephone at the remote location (32) prior to effecting the voice channel. The telephone at the remote location (32) can then be utilized to determine whether the voice channel is effected. |
