Configuration guidelines
To implement the CID function, the VoIP router must be capable to receive calling identity information in the on-hook state, the hardware and software of PBX must support this service, and the called telephone must be able to receive and display calling identity information (such telephones are CID I or CID II class) in the on-hook or conversation state.
The call date and time transmitted in data-message format is the router system time. To ensure correct call time, use the clock command to synchronize router time with the local standard time.