I have a DCS-816 connected to two trunk lines that have caller ID enabled. However, the caller ID of incoming calls does not appear on the telephones connected to any of the analogue or digital extensions. On the analogue telephone, the only number that appears is the trunk number e.g. 706.

I have tried changing the appropriate settings in MMC 119, 300, 312 and 425, tried different countries in MMC 812 and tried reseating both the SIO3 and 4TRK-CID card but I have had no success.

If I connect the analogue telephone directly to each trunk the caller ID does display when there is an incoming call.

Is there any setting that I am missing or is there something else that could be wrong?