Thanks for taking the time to reply! I figured it was set by the carrier so I will ask them why they expect it to be set at my end of things (was part of their UAT process for the SIP trunk setup. Is it maybe so that we can display individual's names instead of just our company name as our PRI does? I had already tried the "Send SIP Alias" in 2.4.3 without any luck. "P Asserted ID Use" is set to None so I'll also try setting it to Primary and Alternative and see if that makes any difference. Thanks again.