>("[Sip] Contact header in 1xx responses/updates remote target or not?")
Hmm if i remember
right rfc 3261 clearly says that only 2xx response to target refresh method
will do it, may i remember wrong ...
My opinion is that Contact must be there always, but unfortunately thats no the
case.
For example i have linksys spa 3201 pstn gateway, it doesn't send Contact for
provisional responses.
Christer Holmberg (JO/LMF) wrote:
> Hi,
>
> I think most people agree that if there is no Contact there is no early
> dialog - and that means no mid-dialog requests (e.g. BYE). One question is
> whether it should be mandatory to include Contact in 1xx (non-100) or not.
>
> This is currently discussed in another thread on the SIP list ("[Sip] Contact
> header in 1xx responses/updates remote target ornot?"), so you may want to
> check that out.
>
> Regards,
>
> Christer
>
>
>
>> -----Original Message-----
>> From: [EMAIL PROTECTED]
>> [mailto:[EMAIL PROTECTED] On Behalf Of Ivar
>> Sent: 6. kesäkuuta 2007 9:11
>> To: [email protected]
>> Subject: [Sip-implementors] Early dialog BYE, no Contact header
>>
>> Hi,
>>
>> In RFC 3261
>>
>> Contact 1xx - - - o - -
>> Contact 2xx - - - m o o
>>
>> For there i guess it's optional, but no the case:
>>
>> UA1 -> UA2
>> UA2 sends ringing without Contact
>> UA1 created early dialog, but wants to terminate it, it must
>> send BYE ...... no contact header what should do ?
>>
>> _______________________________________________
>> Sip-implementors mailing list
>> [email protected]
>> https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
>>
>>
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