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RFC 7544, "Mapping and Interworking of Diversion Information between Diversion and History-Info Header Fields in the Session Initiation Protocol (SIP)", August 2015

Source of RFC: INDEPENDENT

Errata ID: 4481

Status: Verified
Type: Technical

Reported By: Amrita Bhatt
Date Reported: 2015-09-22
Verifier Name: Nevil Brownlee
Date Verified: 2016-03-17

Section 7.3 says:

   |       |       |INV C  |      |       |       |     |      |       |
   |       |       |------>|      |       |       |     |      |       |
   |       |       |History-Info: |       |       |     |      |       |
   |       |       <sip:proxyP1>;index=1, |       |     |      |       |
   |       |       <sip:userB>;index=1.1;rc=1,    |     |      |       |
   |       |       <sip:proxyP2;cause=302>;index=1.1.1;mp=1.1  |       |
   |       |       |       |      |       |       |     |      |       |
   |       |       |       |INV C |       |       |     |      |       |
   |       |       |       |----->|       |       |     |      |       |
   |       |       | Diversion:   |       |       |     |      |       |
   |       |     <sip:userB>;reason=unconditional;counter=1;privacy=off|
   |       |       |       |History-Info: |       |     |      |       |
   |       |       |       <sip:proxyP1>;index=1, |     |      |       |
   |       |       |       <sip:userB>;index=1.1;rc=1,  |      |       |
   |       |       |       <sip:proxyP2;cause=302>;index=1.1.1;mp=1.1  |
   |       |       |       |      |       |       |     |      |       |

It should say:

   |       |       |INV C  |      |       |       |     |      |       |
   |       |       |------>|      |       |       |     |      |       |
   |       |       |History-Info: |       |       |     |      |       |
   |       |       <sip:proxyP1>;index=1, |       |     |      |       |
   |       |       <sip:userB>;index=1.1;rc=1,    |     |      |       |
   |       |       <sip:userC;cause=302>;index=1.1.1;mp=1.1    |       |
   |       |       |       |      |       |       |     |      |       |
   |       |       |       |INV C |       |       |     |      |       |
   |       |       |       |----->|       |       |     |      |       |
   |       |       | Diversion:   |       |       |     |      |       |
   |       |     <sip:userB>;reason=unconditional;counter=1;privacy=off|
   |       |       |       |History-Info: |       |     |      |       |
   |       |       |       <sip:proxyP1>;index=1, |     |      |       |
   |       |       |       <sip:userB>;index=1.1;rc=1,  |      |       |
   |       |       |       <sip:userC;cause=302>;index=1.1.1;mp=1.1    |
   |       |       |       |      |       |       |     |      |       |

Notes:

Since the call is being diverted to userC, the last hi-targeted-to-uri should be that of userC instead of proxyP2.
This is same as example shown in section 3.4 which has userC in last hi-targeted-to-uri where the AS B is diverting the call.

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