Thanks Brett, 
 
This RFC 5086 is 
Structure-Aware Time Division Multiplexed (TDM) Circuit Emulation
            Service over Packet Switched Network (CESoPSN)

Is it the right one for Diversion?
 
Vivek. 


From: Brett Tate <[email protected]>
To: Vivek Singla <[email protected]>; 
"[email protected]" 
<[email protected]> 
Sent: Friday, July 13, 2012 11:29 AM
Subject: RE: [Sip-implementors] Duplicate diversion headers in Invite

RFC 5086 is the historic RFC for diversion.  As far as I know, it does not 
forbid it.

The typical reason that you might see it involves looping.  A loop occurred and 
the device either handled it differently or has not yet detected the loop (or 
reached Max-Forwards 0).

> -----Original Message-----
> From: [email protected] [mailto:sip-
> [email protected]] On Behalf Of Vivek Singla
> Sent: Friday, July 13, 2012 11:58 AM
> To: [email protected]
> Subject: [Sip-implementors] Duplicate diversion headers in Invite
> 
> 
> Hi,
> 
> I am trying to figure out a scenario in which a SIP proxy will get 2
> very same Diversion headers.
> 
> For example:
>   Diversion: <sip:[email protected];user=phone>; privacy=off;
> reason=unconditional; counter=1
>   Diversion: <sip:[email protected];user=phone>; privacy=off;
> reason=unconditional; counter=1
> 
> These 2 headers come in the same INvite message.
> 
> I am just trying to see if there is a RFC out there to justify this
> duplication of these 2 headers?
> 
> Vivek.
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