Receiving a Session Timer too small from the ITSP (SIP/2.0 422 Session Timer too small)?

INVITE FROM ITSP

SENT TRYING

SENT INVITE TO CUCM

RECEIVED TRYING

RECEIVED SESSION TIMER TOO SMALL

CALL FAILED

CUCM has a min session timer of 1800. By default the CUBE will accept any negotiated size for the session timer. Hence we need to ensure the session timer is negotiated correctly with the ITSP before handing onto CUCM.

 *** Required Changes on the CUBE ***

Router(config)# voice service voip

Router(conf-voi-serv)# sip

Router(conf-serv-sip)# min-se time

 *** After the above change ***

INVITE FROM ITSP

SENT TRYING to ITSP

SENT SESSION TIMER TOO SMALL to ITSP

RECEIVED INVITE (with session timer of 1800) from ITSP

SENT TRYING to ITSP

SENT INVITE TO CUCM

RECEIVED TRYING FROM CUCM

RECEIVED CALL IN PROGRESS (Ringing) from CUCM.

Call succeeded.