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When the

Spacevars
0product
 receives a REGISTER request from the SIP endpoint, it sends a policy request to the ERE (or centralized PSX) for the next-hop route to the SIP Registrar. Before forwarding the REGISTER request, the
Spacevars
0product
 creates a Path Header containing its own signaling IP address and port number and includes the Path Header in the outgoing REGISTER request. The reg-info parameter is added to the Path Header and used by the SBC to determine the next-hop direction of future INVITE requests.

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