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Back to IP Multimedia Subsystem (IMS)

Back to SBC as P-CSCF

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The

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acting as P-CSCF transparently passes P-Access-Network-Info header, if present, in SIP request or response received from UE (as long as it does not contain “network-provided” parameter) before forwarding the message towards the next-hop (i.e. IMS core) when pAccessNetworkInfoHeader transparency flag is set to “enable”.

The

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can add the P-Access-Network-Info header if not present in request or response received from UE and does contain “network-provided” parameter. The
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can also delete the P-Access-Network-Info header, if present, in SIP request or response received from UE and it contains “network-provided” parameter, before the message is forwarded to next-hop. This behavior is applicable for INVITE message and its responses, as well as non-INVITE message and its responses.

The

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acting as IBCF can transparently pass P-Access-Network-Info header, if present, in SIP request or response received from UE, including the “network-provided” parameter.
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can also delete P-Access-Network-Info header if it is received in ingress SIP message (applies to SIP request message).

The CLI syntax to enable/disable the P-Access-Network-Info header is:

% set profiles signaling ipSignalingProfile <SIGNALING_PROFILE_NAME> commonIpAttributes transparencyFlags pAccessNetworkInfoHeader <enable | disable>

 

 

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