atcomsystems.ca/forum Forums TDM Business Telephone Systems Avaya - Lucent Telephones & Systems IP Office 500 vers. 9.0

Well, you are going to have to trace the call routes.
Where does the Incoming call route direct the calls? To a hunt group set to ring as collective, and there is 16 users in it? so in addition to 16 phones ringing, you are having the twinning ring, 16 cell phones. And 209 cell voicemail is picking up....

Turn everything off...
Start over, as this is not a good way to handle calls...if you are twinning, you may need to adjust the number of rings for each station, based on how fast their cellular providers send the call to voicemail....reduce the voicemail coverage or remove the delay for when calls start to twin...

There is so much going on here, i would remove all users, add 209, get that set, then add the rest 1 by one...