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Posted by GlowingBlueMist on July 25, 2006, 10:42 pm
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jeff@bosworld.com wrote:
> 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!!
Verify that the PBX has it's own dedicated circuit breaker with no other
equipment or outlets hooked to it.
I have been in a situation where the breaker feeding a PBX in one room had
an additional outlets on the other side of the wall, in another room.
Technicians in that room were plugging in drills and other power tools which
were causing random spikes when the stuff was powered on/off.
With the wiring in the walls we had two choices to track down what else
might be hooked to the PBX breaker. We plugged in a 110v circuit
toner/tracer into the PBX outlet and then went to every outlet (and direct
wired equipment) with the signal sniffer and see if the signal was there,
including light switches. We did find 3 outlets in rooms other than the PBX
room that was on the same breaker. After we had an electrician move them to
another breaker we had no more problems.
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