I have a situation with a Norstar MICS RLS is unknown but I could find it out pretty quick. The switch is running with a PRI. About 20 phones answer the same DID # with a appearance of 8 on each phone. Sometimes when a person answers the phone & transfers the call to another extension the LED on the party transfering the call stays lit as if it were never released. The party recieves the call but the LED does not go out until the person who took the transfer releases the call. I have tried to check the channels on the PRI to see if it is 1 channel creating the problem. I did re create the trouble on 1 channel and de provisioned it. The trouble still seemed to happen.