atcomsystems.ca/forum Forums TDM Business Telephone Systems Toshiba Telephones & Systems CO Lines disconnect while on-hold

How many lines total on the system. Is it just this 5 or are there more lines ?

What model phones are you using ? Are they IP or digital.

Also what type of CO card are you using

Its a CIX1200 system. There are a total of 110 CO Lines in this system. The problem I am having is only on five lines. (these lines are on different cards). The problem lines are all in the same department. They are on about 20 station phones. I use both 2000 and 3000 DKT sires phones. I don't use IP phones (yet).

Those four or five lines appear on 20 station phones. Do they appear at a reception console or phone?

If they appear at a reception phone I would try and see if that phone also drops the call when it is put on hold there. If they don't appear there, assign them and see if the problem replicates.

And, print out the station settings and match those settings with a 2000 or 3000 phone somewhere else that has no problem.

I would bet that the most likely problem is some setting in that group of stations and comparing them to other good stations would be the best place to look for a solution.