Hello. It is not my first GSM gateway, but this error I see never before.
Firmware version -2.5.2, but on 2.5.0 - same.
I'd create voip endpoint, connect my asterisk to it, create call routing rule from endpoint to sims goup (or oen sim - does not matter, result was same)
So, when I trying to call, I get this error (Logs - Asterisk):
No, it does not.
Only if I choose in field "Call Comes in From:" item "Any SIP".
Also, I tryed to connect gateway and asterisk via IAX protocol, but got same error.
Error is gone when I downgrade firmware to 2.4.8, but I now get one-way direction sound (this is another question, becouse another gateways with same configuration work well. Look like problem with NAT, there are no NAT using).