[SIPForum-discussion] SIP/2.0 400 Out-of-order request

[debjit basu]

*400 Bad Request* means request is with bad syntax i.e some mandatory
headers are missing. In your REGISTER request MAX FORWARD and Content-Length
headers are missing.



On Fri, Feb 5, 2010 at 11:43 AM, SIP Babie <sipbabie at gmail.com> wrote:

> Hi All,
>
> Could anybody explain me why "SIP/2.0 400 Out-of-order request" is been
> sent. As shown below, I received this response for the REGISTER request sent
> below.
>
> REGISTER sip:softswitch.com SIP/2.0^M
> Via: SIP/2.0/UDP 100.2.3.4:2198;branch=z9hG4bK*0003-000004d1^M
> From: <sip:mediaserver at softswitch.com <sip%3Amediaserver at softswitch.com>
> >;tag=0000041f^M
> To: <sip:mediaserver at softswitch.com <sip%3Amediaserver at softswitch.com>>^M
> Call-ID: 3 at softswitch.com^M
> CSeq: 92601 REGISTER^M
> Contact: <sip:mediaserver at 100.2.3.4:2198>^M
> Expires: 3600^M
>
>
>
> SIP/2.0 400 Out-of-order request^M
> Via: SIP/2.0/UDP 100.2.3.4:2198;branch=z9hG4bK*0003-000004d1^M
> From: <sip:mediaserver at softswitch.com <sip%3Amediaserver at softswitch.com>
> >;tag=0000041f^M
> To: <sip:mediaserver at softswitch.com <sip%3Amediaserver at softswitch.com>
> >;tag=b72e12N264b6d055c-49a3^M
> Call-ID: 3 at softswitch.com^M
> CSeq: 92601 REGISTER^M
> Contact: <sip:mediaserver at 100.2.3.4:2198>;expires=3133^M
> Contact: <sip:media at 100.2.3.4:2198>;expires=2664^M
> Expires: 3600^M
> Content-Length: 0^M
> ^M
>
> Regards,
> SIPBABIE
>
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