I have a customer using a NexVortex SIP trunk with their UC540. When the setting on NexVortex says PBX Generated ID for Caller ID, it shows up on the called side as unknown number.
I have the caller-id number entered in the caller-id section of CCA.
Anyone have an idea why this doesn't work? They have 3 different phone numbers that need caller-id so I need the caller-id to come from the UC540.