[Asterisk-Users] Some refer transfer questions / issues!

[Paul Belanger]

Hello,

I think there maybe an issue with my refer transfers.  See below or attached:

No.     Time        Source                Destination           Protocol Info
      1 0.000000    192.168.1.2           192.168.1.5           SIP/SDP  Request: INVITE sip:2718389 at 192.168.1.5, with session
description
      2 0.027008    192.168.1.5           192.168.1.2           SIP      Status: 180 Ringing
      3 0.140889    192.168.1.5           192.168.1.2           SIP/SDP  Status: 200 OK, with session description
      4 0.141303    192.168.1.2           192.168.1.5           SIP      Request: ACK sip:2718389 at 192.168.1.5
      5 19.690281   192.168.1.5           192.168.1.2           SIP      Request: REFER sip:6132550048 at 192.168.1.2
      6 19.690602   192.168.1.2           192.168.1.5           SIP      Status: 202 Accepted
      7 19.690691   192.168.1.2           192.168.1.5           SIP/sipfrag Request: NOTIFY sip:192.168.1.5, with Sipfrag(SIP/2.0
200 OK)
      8 19.690722   192.168.1.2           192.168.1.5           SIP      Request: BYE sip:192.168.1.5
      9 19.691225   192.168.1.5           192.168.1.2           SIP      Status: 200 OK
     10 20.699733   192.168.1.2           192.168.1.5           SIP/sipfrag Request: NOTIFY sip:192.168.1.5, with Sipfrag(SIP/2.0
200 OK)
     11 20.700083   192.168.1.5           192.168.1.2           SIP      Status: 481 Call Leg/Transaction Does Not Exist

As you can see Asterisk excepts the REFER, Status: 202 Accepted is returned.  However believe the NOTIFY is incorrect.  If I
understand RFC 3515 correctly, the NOTIFIY should respone with 100 Trying, not 200 OK. See http://rfc.arogo.net/rfc3515.html section
4.1 Prototypical REFER callflow.

Am I correct, or out in left field?

PB
-------------- next part --------------
No.     Time        Source                Destination           Protocol Info
      1 0.000000    192.168.1.2           192.168.1.5           SIP/SDP  Request: INVITE sip:2718389 at 192.168.1.5, with session description
      2 0.027008    192.168.1.5           192.168.1.2           SIP      Status: 180 Ringing
      3 0.140889    192.168.1.5           192.168.1.2           SIP/SDP  Status: 200 OK, with session description
      4 0.141303    192.168.1.2           192.168.1.5           SIP      Request: ACK sip:2718389 at 192.168.1.5
      5 19.690281   192.168.1.5           192.168.1.2           SIP      Request: REFER sip:6132550048 at 192.168.1.2
      6 19.690602   192.168.1.2           192.168.1.5           SIP      Status: 202 Accepted
      7 19.690691   192.168.1.2           192.168.1.5           SIP/sipfrag Request: NOTIFY sip:192.168.1.5, with Sipfrag(SIP/2.0 200 OK)
      8 19.690722   192.168.1.2           192.168.1.5           SIP      Request: BYE sip:192.168.1.5
      9 19.691225   192.168.1.5           192.168.1.2           SIP      Status: 200 OK
     10 20.699733   192.168.1.2           192.168.1.5           SIP/sipfrag Request: NOTIFY sip:192.168.1.5, with Sipfrag(SIP/2.0 200 OK)
     11 20.700083   192.168.1.5           192.168.1.2           SIP      Status: 481 Call Leg/Transaction Does Not Exist