Intermittent Line Fault With Texecom Speech Dialler/veritas Excel Panel

[Guest Shaks]

Hi

I have a Texecom Veritas Excel Control Panel with 8 channel communicator interface. The interface is connected to a Texecom Speech Only Dialler. The two outputs on the speech dialler are connected to Remote Reset input and Line Monitor input on the panel. The output connected to Line Monitor was configured as Line Fault + and was programmed in the panel to set a tamper alarm of when the line was cut.

The dialler is connected through a good quality microfilter (tried a few different types) which is plugged into a seperate extension socket hidden inside a big main trunking box.

4 times in two weeks (twice in one night) the tamper alarm has gone off logging line fault as the cause. Each time it has rang me on the line which is supposedly down. The speech dialler doesn't log line faults unfortunately only calls/inputs so I can't tell if the fault is the line/dialler or the cabling/panel. Evertyhing else works spot on. I have had to disable tamper on line fault to stop this happening.

Any ideas?

Shaks

[dpaengineer]

1571 owt to do with it?

[Guest Shaks]

1571 owt to do with it?

Hi

Don't have any services like that on at all.

Also I noticed if I disconnect the telephone line it actually doesn't pick the fault up for about 15 seconds. But when connected back tamper goes off immediately. I guess this is to disregard minor interruptions.

Shaks

[breff]

Have you wired direct from the diallers output into the panels input?

I may be wrong but, Im sure the diallers output is 0v applied and the panels input needs 0v removed(12v applied)

[Guest Shaks]

Have you wired direct from the diallers output into the panels input?

I may be wrong but, Im sure the diallers output is 0v applied and the panels input needs 0v removed(12v applied)

Output 1 on the dialler is connected directly to Line Monitor on the panel. The output is programmed as Line Fault + which works Ok. I don't have the books to hand but I'm assuming this is 0v removed/12v applied when in fault mode. The other option (Line Fault) causes a tamper when connected and is fine when disconnected so I would say the polarity is correct. If I remove the telephone plug, about 15 secs later tamper goes off, plugging it back in tamper light immediately goes off. This part works as intended, just the intermittent line faults that are annoying.

Shaks

[Guest ALSEC]

Maybe the line is actually going down for more than 15 seconds and then coming back on and dialling you to let you know? Seems a bit odd though.

[Guest Shaks]

Maybe the line is actually going down for more than 15 seconds and then coming back on and dialling you to let you know? Seems a bit odd though.

That's exactly what I thought however whilst it's dialling on the line it's still showing line fault.

THe first two times it did this, I checked all the connections and found the earth connection a little loose. The earth in the dialler is connected to earth in the control panel (from mains wiring). Is this the correct procedure? After I tightened the connection the frequency of false alarm went from twice a day to twice a week but it's still not acceptable.

Shaks

[Lectrician]

That's exactly what I thought however whilst it's dialling on the line it's still showing line fault.

THe first two times it did this, I checked all the connections and found the earth connection a little loose. The earth in the dialler is connected to earth in the control panel (from mains wiring). Is this the correct procedure? After I tightened the connection the frequency of false alarm went from twice a day to twice a week but it's still not acceptable.

Shaks

My texecom dialler also signals a line fault to my panel around once a week, always at night. I notice it in the log when I look to see what time my lads go in and out of the office. I have put it down to the automatic BT line test. I spoke to a BT engineer, and he says ADSL lines are tested more regularly than standards lines.

[Guest Shaks]

That's exactly what I thought however whilst it's dialling on the line it's still showing line fault.

THe first two times it did this, I checked all the connections and found the earth connection a little loose. The earth in the dialler is connected to earth in the control panel (from mains wiring). Is this the correct procedure? After I tightened the connection the frequency of false alarm went from twice a day to twice a week but it's still not acceptable.

Shaks

. By the way, the earth for the dialler is only connected using one core of the 8 core cabling, should I use more that one core or should I use mains earth cabling?

Shaks

[Guest ALSEC]

. By the way, the earth for the dialler is only connected using one core of the 8 core cabling, should I use more that one core or should I use mains earth cabling?

Shaks

try using 1mm t&e instead (obviously only the earth with sleeving over it).