General

CUBE is stripping "Session-Expire" header

Symptom

The Provider disconnect the call after 23 minutes, the CUBE remove the header when using conference, as we have multiple INVITES,

Conditions

Workaround

Further Problem Description

Here CUCM is acting as session refresher and timer set to 900 second. Once call is connected, CUCM send re invite for session refresh at 450 second with both "Min-SE" and "Session-Expires" expire header. CUBE send this re invite to provider side with "Min-SE" header only. 200 OK response received from provider on CUBE again contain "Session-Expires" header. But when CUBE send this 200 OK CUCM, it strip "Session-Expires" and this stop CUCM to send next session refresh.Eventually call cleared by provider side once timer expire. CUBE is configured for session refresh