[OpenSIPS-Users] How to send 200 OK for REGISTER without adding Tag in SIP-To-Header (To-Tag $tt)

Bogdan-Andrei Iancu bogdan at voice-system.ro
Wed Oct 8 18:40:20 CEST 2008

Hi Pai,

It is a must (by RFC3261) to have a TO-tag in any final reply (including 
200 OK) . What are you asking is a violation of the SIP RFC.

I guess the problem is in the SIP client from the NOKIA device. You 
should try to solve it there.

Anyhow, to answer to your question, no, there is no way to send a 200 OK 
without To-tag :).


Pai Peng wrote:
> Hello,
> I am using Opensips 1.4.2  as SIP-Server and a Nokia N95 as SIP-Client.
> But I got error -17701 on N95 by registering with 200 OK response from 
> the server.
> I compared the 200 OK SIP-message with other worked SIP-Server und 
> found out, that the problem maybe is on the To-Tag in the response.
> Now I want the Opensips not adding to-tag into the 200 OK response for 
> register. Can anyone give me a help?
> Thanks
> Pai
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