Hi Jim,
Caller ID cannot be passed from a Foreign Exchange Office (FXO) port on any of the 1700 Series Access Router, 2600 Series Multiservice Platform and 3600 Series Multiservice Platform gateways that run in Media Gateway Control Protocol (MGCP) mode. However, the caller ID can be passed from a PRI or a Foreign Exchange Station (FXS).
If caller ID support is essential on the FXO port, configure the gateway to run in H323 mode.
Sincerely,
Brad Reese BradReese.Com Cisco Repair Service Experts