Hi, I am facing strange problem. I am able to connect Grandstream GXP1450 connected to LAN directly to TPG SIP account, and I am able to call in and out with no problem. I am also able to set Trunk with the same credentials but incomming calls report congestion and outgoing reports phone number is not ringing.
I have several other SIP and AIX accounts working fine.
Has anybody idea how to fix it?
Please post some SIP debug from the Asterisk CLI on the failing incoming call.
It could be codec or port mismatch - hard to say without seeing the INVITE.
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