I am having problems setting up SIP trunks with an Avaya S8720. We are not using the SIP Enablement Server (SES) but are using the native SIP in CM5.1. It talks either TLS or TCP but no UDP. It is currently set to TCP. We are using FreePBX 2.5.1.0 and Asterisk 1.6.0.9 in order to get get TCP on Asterisk.
I have tried various searchs without finding applicable results. 
I can call station to station with no problem. When I try to call to the Asterisk from the Avaya, I get “ss-noservice” intercept so I know the two switches are talking on at least some level. I do hear the announcement from the Avaya end.
Following some of the other posts on this forum, I set up the debug on the channel. I tried to use verbosity set to 0 but got nothing so I went back to 3 and got this output. Sorry if it is too long.
== Using SIP RTP TOS bits 184
== Using SIP RTP CoS mark 5
– Executing [10999@from-sip-external:1] NoOp(“SIP/invalid.unknown.domain-1664caf0”, “Received incoming SIP connection from unknown peer to 10999”) in new stack
– Executing [10999@from-sip-external:2] Set(“SIP/invalid.unknown.domain-1664caf0”, “DID=10999”) in new stack
– Executing [10999@from-sip-external:3] Goto(“SIP/invalid.unknown.domain-1664caf0”, “s,1”) in new stack
– Goto (from-sip-external,s,1)
– Executing [s@from-sip-external:1] GotoIf(“SIP/invalid.unknown.domain-1664caf0”, “0?from-trunk,10999,1”) in new stack
– Executing [s@from-sip-external:2] Set(“SIP/invalid.unknown.domain-1664caf0”, “TIMEOUT(absolute)=15”) in new stack
Channel will hangup at 2009-06-03 11:46:52.000 EDT.
– Executing [s@from-sip-external:3] Answer(“SIP/invalid.unknown.domain-1664caf0”, “”) in new stack
– Executing [s@from-sip-external:4] Wait(“SIP/invalid.unknown.domain-1664caf0”, “2”) in new stack
– Executing [s@from-sip-external:5] Playback(“SIP/invalid.unknown.domain-1664caf0”, “ss-noservice”) in new stack
– Playing ‘ss-noservice.ulaw’ (language ‘en’)
== Spawn extension (from-sip-external, s, 5) exited non-zero on ‘SIP/invalid.unknown.domain-1664caf0’
– Executing [h@from-sip-external:1] NoOp(“SIP/invalid.unknown.domain-1664caf0”, “Hangup”) in new stack
– Executing [h@from-sip-external:2] Set(“SIP/invalid.unknown.domain-1664caf0”, “DID=s”) in new stack
– Executing [h@from-sip-external:3] Goto(“SIP/invalid.unknown.domain-1664caf0”, “s,1”) in new stack
– Goto (from-sip-external,s,1)
– Executing [s@from-sip-external:1] GotoIf(“SIP/invalid.unknown.domain-1664caf0”, “0?from-trunk,s,1”) in new stack
– Executing [s@from-sip-external:2] Set(“SIP/invalid.unknown.domain-1664caf0”, “TIMEOUT(absolute)=15”) in new stack
Channel will hangup at 2009-06-03 11:46:57.000 EDT.
– Executing [s@from-sip-external:3] Answer(“SIP/invalid.unknown.domain-1664caf0”, “”) in new stack
== Spawn extension (from-sip-external, s, 3) exited non-zero on ‘SIP/invalid.unknown.domain-1664caf0’
Incoming settings are
user context is set to from-trunk
host=XXX.XX.XXX.X with that IP being the address of the CLAN on the S8720
type=peer
context=from-trunk
The Avaya does not seem to support the registration feature. The Avaya guru has some notes from a meeting he attended but I don’t know how to really interpret them based on what I see in FreePBX. His notes are:
• In the Asterisk /etc/asterisk folder
o ;#sipid=???
Enter a User ID
o secret=avaya
it doesn’t matter what is put here because the insecure=very later overrides it but I believe something is needed
o callerid=000000
o type=friend
o context=sip-pbx
o host=SVP CLAN
o nat=no
o canreinvite=no
o insecure=very
o username=000000
I almost think it is a context issue but I don’t know how to resolve it.
I am very new to this and don’t know where to go from here. I am also having issues with calling out but one thing at a time! 
I appreciate any help you can give me. Please let me know if there are other pieces of information that might help.