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

[SIP Babie]

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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