Experts, I have clarityel provider and looks like they block option to allow ANY CID on the trunk. Currently I have Force TRUNK CID. The problem is I would like to use other number than in Trunk for outgoing faxes.
Inbound is forwarded to extension (which is set on grandstream H812) but outgoing I use with prefix 9 and specific CID. When I choose Allow ANY CIDin the trunk I have I
chan_sip.c: Received response: “Forbidden” from ‘sip:FAXNUMBER@sip.claritytel.com:5160;tag=as5fa7c’
[2019-03-06 01:34:55] VERBOSE[C-00001229] app_dial.c: Everyone is busy/congested at this time (1:0/0/1)
In the extension I would use CIDnumber but I cannot. Is there any way I can fix it in freepbx config or calling claritytel is the only way?