I think i didn't understood at all some concept about NTA.

After i forward the initial INVITE from one SIP client to another al the 
other messages are automatically processed (logs says "going to a 
transaction").
Is there a way to have the callback working for those? I need to keep 
track of them for my stuffs.
It seems that my callback (from the default leg) is processed only when 
the transaction is create NOT when a new message arrives for an already 
existing transaction.

Perhaps i should do everything "by hand" in a stateless way?


Logs:

   ------------------------------------------------------------------------
nta: received 180 Ringing for INVITE (1)
nta: 180 Ringing going to a transaction
nta: 180 Ringing is reliably received with RSeq: 8002
nta: 180 Ringing with initial RSeq: 8002 outside dialog
recv 946 bytes from udp/[192.168.1.186]:42202 at 12:13:53.234504:
   ------------------------------------------------------------------------
   SIP/2.0 200 OK
   Via: SIP/2.0/UDP 192.168.1.8;rport;branch=z9hG4bKg1SNKB7e6g85e
   Via: SIP/2.0/UDP 
192.168.1.13:50600;branch=z9hG4bK-d8754z-1c77ff69e44ff9f7-1---d8754z-;rport=50600
   Record-Route: <sip:192.168.1.8>
   From: "106"<sip:[EMAIL PROTECTED]>;transport=UDP;tag=03523965
   To: <sip:[EMAIL PROTECTED]>;tag=7536ac762d33bf9e
   Call-ID: ODMzMjJmMmM5OTQzNzBhNmEwYzA4MDQ0NmZmOTE3NTk.
   CSeq: 1 INVITE
   User-Agent: Grandstream GXP2010 1.1.6.16
   Session-Expires: 180;refresher=uas
   Min-SE: 180
   Contact: <sip:[EMAIL PROTECTED]:42202;transport=udp>
   Allow: 
INVITE,ACK,CANCEL,BYE,NOTIFY,REFER,OPTIONS,INFO,SUBSCRIBE,UPDATE,PRACK,MESSAGE
   Content-Type: application/sdp
   Supported: replaces, timer, 100rel
   Content-Length: 233

   v=0
   o=13 8000 8000 IN IP4 192.168.1.186
   s=SIP Call
   c=IN IP4 192.168.1.186
   t=0 0
   m=audio 38226 RTP/AVP 98 101
   a=sendrecv
   a=rtpmap:98 iLBC/8000
   a=fmtp:98 mode=30
   a=ptime:20
   a=rtpmap:101 telephone-event/8000
   a=fmtp:101 0-11
   ------------------------------------------------------------------------
nta: received 200 OK for INVITE (1)
nta: 200 OK going to a transaction
recv 946 bytes from udp/[192.168.1.186]:42202 at 12:13:54.231395:
   ------------------------------------------------------------------------
   SIP/2.0 200 OK
   Via: SIP/2.0/UDP 192.168.1.8;rport;branch=z9hG4bKg1SNKB7e6g85e
   Via: SIP/2.0/UDP 
192.168.1.13:50600;branch=z9hG4bK-d8754z-1c77ff69e44ff9f7-1---d8754z-;rport=50600
   Record-Route: <sip:192.168.1.8>
   From: "106"<sip:[EMAIL PROTECTED]>;transport=UDP;tag=03523965
   To: <sip:[EMAIL PROTECTED]>;tag=7536ac762d33bf9e



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