1. Configuration Guide
  2. SIP Signaling Services
  3. RFC 4028 Session Timers
  4. Session Refreshes
  5. Timer Expiration

Timer Expiration

If the Oracle Communications Session Border Controller fails to receive a session refresh request before the session expiration, the session will be terminated before the full session time. This is computed according to: 

time=period-min(period/3,32)

After the real expiration time elapses, the Oracle Communications Session Border Controller sends a BYE request in both directions to terminate the session.

The OCSBC terminating a session based.