I do have another question. I'm having some difficulty get my outbound caller ID to spoof as a different number. I'm using Gamma SIP trunks and I wondered if there was any specific settings for it?
Essentially, we have a temporary number whilst we migrate our primary number and I want the number to appear as our primary whilst the temp is in place.
As far as i know Gamma does support this but you need to contact them to enable it. If i remember correctly they call it "CLI Flex". Also make sure you use the default template to setup Gamma in the PBX. All the settings will then be configured for you.