Re: Telco Line Fault??

["ABLE1" <royboynospam@xxxxxxxxxxxxx>]

"Doug" <not@xxxxxxxx> wrote in message
news:MNqBn.91758$iL1.21395@xxxxxxxxxxxxxxx
>
> "ABLE1" <royboynospam@xxxxxxxxxxxxx> wrote in message
> news:z4pBn.55010$vX7.28936@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
>> 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
>>
>>
>
> If the threshold really is 10 volts, which as you say sounds too high, and
> off hook you measure 6.5 to 7.5 volts which sounds about right then other
> than changing to dedicated lines you are going to struggle to resolve
> this.
>
> Honestly I can't see that the threshold voltage is really set at 10 volts
> or
> it would be a major issue for them.
>
> Doug

This is kinda where I am going on this, and I am glad you pointed it out.
I am wonder if the UL 864 specifies the voltage threshold in some way to
some how dictate that dedicated lines be used for fire panels??

I keep getting this statement from tech support that "UL requires dedicated
lines."

I am trying to get someone at UTC to explain the 10vdc threshold but it is
difficult.

Aside from that I will look into the ground and Viking issues.

Thanks,

Les