SIP PAI Not Preserved in Outgoing INVITES After SRP Interaction (Doc ID 2237244.1)

Last updated on JULY 23, 2024

Applies to:

Symptoms

In all versions of Oracle Communications Network Charging and Control (OCNCC or NCC) and Oracle Communications Convergent Charging Controller (OC3C), a problem exists in Session Control Agent (SCA) where a Privacy Asserted Identifier (PAI) is not preserved and forwarded in outgoing INVITE Session Initiation Protocol (SIP) headers after slee_acs has interacted with a Specialized Resource Point (SRP) over Intelligent Network Application Protocol (INAP).

SCA is NCC/OC3C SIP Gateway.

This is an example of the problematic call flow:

where:

• The Selection Dependent Routing (SD) node triggers the INVITE to the SRP (which responds with INAP messages)
• The Attempt Terminate (AT) node triggers the INVITE to the actual B-Party

In this example, Frame 18 should include the PAI from Frame 1 (as this is part of the "trusted" SIP network) but due to this issue, the PAI is not forwarded.

More information on the SIP PAI and its use can be found in RFC 3325 "Private Extensions to the Session Initiation Protocol (SIP) for Asserted Identity within Trusted Networks".

Changes

Integration of NCC/OC3C into a SIP network.

Cause

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