This is an ongoing problem for over 2 years since the building was constructed. Intermittently when an incoming call is placed on hold the caller is dropped. It happens on 6 different lines. Some are in a hunt group, others are not. It doesn't happen at any particular time, the amount of calls, weather conditions, etc. Nothing consistent at all. We can go for over 1 week without dropping a call on hold, then we will drop 4-6 in an hour. We only drop calls when they are placed on hold or they are parked.
We have been working with the telephone company to try and resolve this problem. We had a Norstar system, that was then upgraded to a BCM 400. We have tried 2 BCM 400's. We have replaced all cables to the BCM, all incoming and outgoing wires, punch down blocks etc. The local Telco's Nortel expert has gone through our software settings and verified everything is correct. Telco has checked all voltages, line currents etc. We have placed balanced loop current attenuator on all lines. All to no avail.
Any input you can give into this problem would be greatly, greatly appreciated. The telco is grasping at straws, and the next step is to re-route our dial tone through another CO.
Thanks in advance!!