[SIPForum-discussion] SIP Mandatory fields

[Stewart Bunce]

Contact header field is mandatory in INVITEs and 2xx final responses, it is used along with any Record-Route headers to establish the route-set to be used throughout the dialogue. The list of required/optional fields and the messages they can used in appears in RFC3261 section 20 Table 2: Summary of header fields A--O and Table 3: Summary of header fields P--Z. Hope this helps
 
Stew

 -----Original Message-----
From: discussion-bounces at sipforum.org [mailto:discussion-bounces at sipforum.org]On Behalf Of fråmedrëlay
Sent: 11 August 2008 16:25
To: Sachin Parnami
Cc: discussion at sipforum.org
Subject: Re: [SIPForum-discussion] SIP Mandatory fields



Hi,

Thanks for your email & I do NOT think that's correct.
Contact header is not a mandatory field.

I believe the mandatory fields are,
1. To
2. From
3. CSeq
4. Call-ID
5. Max forwards
6. Via



--- On Mon, 8/11/08, Sachin Parnami <sachin.mobite at gmail.com> wrote:



From: Sachin Parnami <sachin.mobite at gmail.com>
Subject: Re: [SIPForum-discussion] SIP Mandatory fields
To: framedrelay at yahoo.com
Cc: "discussion at sipforum.org" <discussion at sipforum.org>
Date: Monday, August 11, 2008, 10:42 AM


Hi Sylvester,

I think
this will solve your confusion.


                                                       dialog

                                          reg./redir.

 Contact/
              default  Req.-URI  To  From  Contact   R-R/Route  external
user          --          o      o    o       o          o         o
password      --          o      o    o       o          o         o

host          --          m      m    m       m          m         m
port          (1)         o      -    -       o          o         o
user-param    ip          o      o    o       o          o         o
method        INVITE      -      -    -       -          -         o

maddr-param   --          o      -    -       o          o         o
ttl-param     1           o      -    -       o          -         o
transp.-param (2)         o      -    -       o          o         o
lr-param      --          o      -    -       -          o         o

other-param   --          o      o    o       o          o         o
headers       --          -      -    -       o          -        

 o


Entries marked "m" are mandatory, those

   marked "o" are optional, and those marked "-" are not allowed.

Regards,
Sachin Parnami


On Sat, Aug 9, 2008 at 11:34 AM, fråmedrëlay < framedrelay at yahoo.com> wrote:


Hi All,

Can anyone please let me know what are the mandatory fields in SIP? Please let me ASAP, that would be really great help.

Cheers,
Sylvester
	


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