Forced Release Intrusion allows a caller, when reaching a busy destination, to forcefully clear the callee's current connection. Lotus Sametime Unified Telephony supports Forced Release Intrusion requests originating in the SIP-Q private network and terminating at a local subscriber. Subscriber invocation of Forced Release is not supported.
TCS (Lotus Sametime Unified Telephony) will only execute the request, if the target subscriber is in a stable voice call (that hasn't been established via Forced Release Intrusion) or large conference and is not administratively protected against Forced Release Intrusion.
If this is the case, TCS will either
clear the subscriber's stable 2-party call, or
remove the subscriber from his/her current conference
in order for the intruder and the now-idle subscriber to connect into a new call.
There is no warning tone or announcement provided to the called party and call partner(s) prior to releasing the call.
Because the SIP phone/client does not support facility invocation when busy, the feature requires that the called user goes on-hook after the forced release. Then, the called user is immediately called and, upon answer, is joined into a connection with the caller that invoked the forced release.
The caller may require Terminating Feature Override capabilities in order to successfully establish the call to the intended subscriber.
If Forced Release Intrusion can't be performed and if the caller may not invoke additional services against the busy subscriber such as CCBS (Call Completion to Busy Subscriber) or Executive Intrusion, TCS terminates the "intrusion call".
A call with forced release permission is subject to CAC (Call Admission Control) unless it includes a classmark for "Emergency Call".
Currently, the subscriber protection parameter for Executive Busy Override is reused by the Intrusion service to allow/block forced release. So in order to protect a subscriber from Executive Intrusion, he or she has to be provisioned for Executive Busy Override
with either the Block Override
or Override and Block
Forced Release Intrusion
is not supported for subscribers behind a branch that is in survivability modeParent topic: Calling Services
is currently not indicated in the CDRs
Executive Busy Override
Terminating Feature Override (SIP-Q)