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RFC 5589, "Session Initiation Protocol (SIP) Call Control - Transfer", June 2009

Source of RFC: IETF - NON WORKING GROUP
Area Assignment: rai

Errata ID: 8310
Status: Reported
Type: Technical
Publication Format(s) : TEXT
Reported By: Julien Rousseau
Date Reported: 2025-02-24

Section 7.3 says: 

F5 REFER Transferor -> Transferee

   REFER sips:3ld812adkjw@biloxi.example.com;gr=3413kj2ha SIP/2.0
   Via: SIP/2.0/TLS pc33.atlanta.example.com;branch=z9hG4bKnashds9
   Max-Forwards: 70
   To: <sips:3ld812adkjw@biloxi.example.com;gr=3413kj2ha>
   From: <sips:transferor@atlanta.example.com>;tag=1928301774
   Call-ID: a84b4c76e66710
   CSeq: 314159 REFER
   Require: tdialog
   <allOneLine>
   Refer-To: <sips:482n4z24kdg@chicago.example.com;gr=8594958?
   Replaces=592435881734450904%3Bto-tag%3D9m2n3wq%3Bfrom-tag3D763231>
   </allOneLine>
   Target-Dialog: 592435881734450904;local-tag=9m2n3wq
    ;remote-tag=763231
   Contact: <sips:4889445d8kjtk3@atlanta.example.com;gr=723jd2d>
   Content-Length: 0

It should say:

F5 REFER Transferor -> Transferee

   REFER sips:3ld812adkjw@biloxi.example.com;gr=3413kj2ha SIP/2.0
   Via: SIP/2.0/TLS pc33.atlanta.example.com;branch=z9hG4bKnashds9
   Max-Forwards: 70
   To: <sips:3ld812adkjw@biloxi.example.com;gr=3413kj2ha>
   From: <sips:transferor@atlanta.example.com>;tag=1928301774
   Call-ID: a84b4c76e66710
   CSeq: 314159 REFER
   Require: tdialog
   <allOneLine>
   Refer-To: <sips:482n4z24kdg@chicago.example.com;gr=8594958?
   Replaces=592435881734450904%3Bto-tag%3D9m2n3wq%3Bfrom-tag3D763231>
   </allOneLine>
   Target-Dialog: 090459243588173445;local-tag=7553452
    ;remote-tag=31431
   Contact: <sips:4889445d8kjtk3@atlanta.example.com;gr=723jd2d>
   Content-Length: 0

Notes:

In 7.3. Attended Transfer, message F5 REFER Transferor -> Transferee has a Target-Dialog header that contains the dialog identifying information from the call to the Transfer Target when it should have the ones from the call from the Transferee.

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