Question: In 3GPP Lawful Interception (LI) for Call Diversion services, what happens to the original CC links when Call Forwarding No Reply (CFNR) timer expires and the call is forwarded?
Option 1: The original CC links are maintained, and a new set of CC links is established for the forwarded call.
Option 2: The original CC links are released, and then new CC links are set up for the forwarded call, potentially triggering a new LI transaction.
Option 3: The original CC links are put on hold until the forwarded call is completed, then resumed.
Option 4: The original CC links automatically switch to the forwarded destination without interruption.
Explanation: According to the procedures outlined for handling Call Forwarding No Reply (CFNR) and similar services, when the forwarding takes place after the timer expiry, the original call is released. This release may also cause the original CC links to be released. Following this, a new setup procedure for the forwarded call can occur, which may include establishing new CC links and potentially initiating a new Lawful Interception (LI) transaction with a fresh set of IRI records starting from an IRI-BEGIN record sent to the Law Enforcement Agency (LEA).