2629 - IR.92 Compliance via SIP 380 Response

This feature furthers the Oracle Communications Session Border Controller’s compliance with GSMA's Voice over LTE specification (IR.92) to redirect VoLTE originated emergency calls to a circuit switched network.

When the Oracle Communications Session Border Controller receives an emergency call, which it can not complete, it returns a 380 (Alternative Service) response to the sender. Some examples of when the Oracle Communications Session Border Controller can not forward such an emergency call are:

• The Next-hop does not exist to route the call via NMC means
• The NSEP calls are rejected due to the Oracle Communications Session Border Controller hitting a load limit
• The NSEP calls are rejected due to the target session agent exceeding constraints
• The NMC treatment for the call is set to Reject