inbound outbound work fine, mobility on the avaya ip office which sits behind the adtran SBC works as well but I can only send a Twilio did to the mobility number we are unable to have a call come in and then loop back to the twinned (simul ring) cellphone of the person called and show the caller id of the original caller, the bounce back is that it is not a registered number, stir / shaken etc etc (of course there is no way to know who is calling to register everyone's number). how can we bypass this ? Sip trunking REFER issue
Twilio support says to enable REFER, which I ahve done in the Twilio interface for the sip trunking but i cannot find any documentation from adtran other than one command no reject-external which is used for conferencing but does have REFER in the documentation and that did not resolve it
