My sip provider told me that they have verified my PSTN number number and would allow me to send that as my caller-id on the SIP trunk.
You may now pass the above caller ID using either of the following methods:
However, if I go into CCA > Configure > Telephony > Dial Plan > Outgoing > Caller-Id TAB
and set the 'alternate' number that they verified to be 'caller ID main PSTN number', it doesnt work.
Does the Cisco UC500 use one of the above methods?
If not, is there a way to force it to use one of those methods?
I havent tried to over-ride each and every internal number using the alternate, I suppose I could try that.