Session Border Controller : SIP Invite gets Rejected with 422 Session Interval Too Small

(Doc ID 2374274.1)

Last updated on MARCH 30, 2018

Applies to:

Acme Packet 3820 - Version E-Cx6.4.0 and later
Information in this document applies to any platform.


The far end endpoint is expecting session-expires to be at least 3600 seconds but the invite is coming with only 1800s so this invite is rejected with 422 error.

To modify session-expires timer from 1800 to 3600.

Initial invite comes in with Session-Expires: 1800 :

INVITE sip:3123004324@;transport=tcp SIP/2.0
Via: SIP/2.0/TCP;branch=z9hG4bKl5s2ht300o30apo02090.2
From: "Festek Inc" <sip:5164826417@>;tag=
To: <sip:3123004324@>
CSeq: 30326 INVITE
Expires: 60
Supported: 100rel
Content-Length: 237
Call-Info: <sip:>;method="NOTIFY;Event=telephone-event;Duration=2000"
Contact: <sip:;transport=tcp>
Content-Type: application/sdp
Call-ID: 408b5f7566e29c11afcbc4e42a8bf522@
Max-Forwards: 24
Session-Expires: 1800
Accept: application/sdp, application/dtmf-relay

The endpoint is rejecting it with 422:

SIP/2.0 422 Session Interval Too Small
From: "Festek Inc" <sip:5164826417@>;tag=
To: <>;tag=066928aee30e81ad825ab8995900
Call-ID: 408b5f7566e29c11afcbc4e42a8bf522@
CSeq: 30326 INVITE
Via: SIP/2.0/TCP;branch=z9hG4bKl5s2ht300o30apo02090.2
Server: Avaya CM/R015x. AVAYA-SM-
Min-SE: 3600
Content-Length: 0


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