I have two Attendant Consoles set up on CUCM 6.1(2). Sometimes when the AC users are logged in they can't receive any calls. The Attendant Console Server Service needs to be restarted on the Subscriber. I had a look on the Subscriber with RTMT and found nothing strange but when I looked on the Publisher, I saw the the Attendant Console Server Service had a "Lowheartbeatrate" alert. The timestamp on the alert is the same time as when the Attandant Consoles stopped receiving calls. The Attandant Consoles points first to the Sub and then to the Pub. Any suggetions on why this would happen and how to rectify this, please ?