Charles Ulrich wrote:
You mean SIP doesn't have some kind of caller ID header? When these phones are registered directly with Asterisk, caller ID works exactly like a legacy non-SIP phone: Only a name and a number (or extension) appear on the display on an incoming call. Using SER as a proxy, we get the SIP URI instead of simply the telephone number.
The display name part of the From header has been designed to serve this purpose. You should have a close look at the messages generated by your Asterisk server to determine the differences between these and those generated by SER.
Regards, Olaf