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The

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acting as P-CSCF can be configured to insert the P-Visited-Network-ID header field with a provisioned string on receiving REGISTER, OOD INVITE and OOD non-INVITE requests from UE before forwarding the requests towards IMS core network.

Sonus IBCF shall either transparently pass or delete the P-Visited-Network-ID header in REGISTER, INVITE, OOD non-INVITE message from ingress call-leg to egress call-leg, as configured.

The CLI syntax to provision the P-Visited-Network-ID string is shown below:

% set addressContext default zone <ZONE_NAME> sipTrunkGroup <TG_NAME> signaling P-HeaderExtensions insertpVisitedNetworkID <character-string>

See SIP Trunk Group - Signaling - CLI for details.

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