called subscriber造句怎么写

A signal sent in the backward direction to indicate that the call has been placed in a waiting queue because the called subscriber is busy but has the camp on facility.

Called Subscriber Identification. Optional signal used to provide the specific identity of the called subscriber by its international telephone number.

called subscriber held lamp

First, the audio signal is established in the same way that any phone call is made... only if the called subscriber also has a video phone set.