I am trying to set up MLPP on CCM 6.1(2) to support pre-emption of calls between IP phones.
I have used the instructions (How to setup basic MLPP section) in the document below.
The pre-emption tones seem to be played ok but the precedence call does not pre-empt a normal call after 30 seconds has expired.
I have double checked all my settings and everything seems ok. Has anyone got this working and is there anything required that is missed in the document link? The document is for CCM4.x so I guess there might be.
Also can anyone confirm that non-precedence calls can be preempted or is it just calls with a lower precedence that can be preempted?
When the call is preempted the preempted parties should hear preemption tone. The "acknowledgment" is the user hanging up the call, but if they don't the tone will time out (I believe it's the T.305 timer) and the preempting call will ring in.
What symptoms are you experiencing? Preemption should work just fine. Do you have max calls set to 1? Precedence calls will ring in on any available call instance ("line") before preempting another call.