Hi, I have a sip trunk configured on a UC520, where the main number is 644800 and I have configured 4800 as my AA trigger. However when I call the main number it ring s a few times and then I get an engaged tone. From the debug output it shows that I am calling 4801 which is another extension, "though I ring 4800" I have asked the SIP provider and they have told me that sip registration is coming with extension 4801 since the call is to extension 4801. Appreciate your clarification on this matter.
Relevant debugging and config is attached.