Hey all, Been working at this for a while, he call path is as follows: ABC calls the office, passes through ring groupd until it heads for the external mobile number. Here it is supposed to give the caller ID of ABC, instead it gives the office number. The SIP provider we have here is Spectrum and they are claiming that everything is good on their end for us to pass through the external ID, but still no dice. I have modified the outbound SIP parameters as follows: Any clues as to what I am missing would be great! Thanks guys!