Telco Line Fault??

["ABLE1" <royboynospam@xxxxxxxxxxxxx>]

Hey to all,

I installed a new Fireworx FX-64RD panel a couple of months ago.  Almost
from day one started to receive sporadic Telco Line Faults.  Both Line 1 and
Line 2.  Little correlation can be determined except it happens 9 times out
of 10 during the week Monday - Friday and during the day 9am to 5 pm.  In
other words 90% of the time during working hours.  (aka when the phone are
likely to be used)

It happens 1 to 3 times in a given day and then skip a day or two.

It was originally connected  to their Line 1 and Fax Line, I have moved to
L-1 and L-3 no help.  It is now on L-1 and L-2 and am waiting to see how it
goes.  Line 1 happens less frequent so I have left it alone.

In calling UTC Tech Support...........................  I was told that the
threshold voltage is 10vdc.

I have gotten the 10vdc from a couple of different techs so that must be the
number but it seems to be on high side.  I remember on a burg panel that I
was having a problem a couple of years ago I was told the threshold was
6vdc.

What I am reading at the panel is 6.5 to 7.5vdc when a phone is off hook.
So if the threshold is 10vdc then the panel is going to go into trouble
after the timeout of 2 minutes which is the maximum.

The lines that I am working with are (what I think is) POTS lines on copper.
However I was told that if there is a digital converter?? it could cause
some trouble.  How do I determine if this is the case???

Has anyone here experienced this??  Especially on this panel??

Any additional thoughts that may help would be appreciated.

TIA

Les