DSC 632 1555MX & TLM troubles

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Hello,

I have a DSC Power Series 632 system with a 1555mx main board. The
system is monitored and TLM is enabled. I am getting a Trouble Code #3
whenever my phone line goes off hook. The trouble disappears when the
phone goes back on hook. The monitor company is getting messages all
day long about phone line being restored. I check the incoming voltage
for T&R on the panel. I have 50v dc when the phone is on hook and about
6.5v dc when the phone is off hook. The system communicates just fine
with the monitoring company. I am only having problems when I am trying
to use my shared phone line.

Any ideas????

Jason

 

[Frank Olson]

Hello,

I have a DSC Power Series 632 system with a 1555mx main board. The
system is monitored and TLM is enabled. I am getting a Trouble Code #3
whenever my phone line goes off hook. The trouble disappears when the
phone goes back on hook. The monitor company is getting messages all
day long about phone line being restored. I check the incoming voltage
for T&R on the panel. I have 50v dc when the phone is on hook and about
6.5v dc when the phone is off hook. The system communicates just fine
with the monitoring company. I am only having problems when I am trying
to use my shared phone line.

Any ideas????

Jason

You wouldn't by any chance be using "VOIP" would you???

 

[Doug L]

The off hook voltage will normally be much lower than 23 volts, somewhere
around 4.5 to 9 volts

Doug L

 

[alarman]

Check to see that the telco wiring to the control and RJ31X is wired
properly. You might have the incoming telco wired to the premises side.
js

 

[JasonN]

Ok... Here is what I did this morning to test...

I disconnected the yellow/black pair coming out of the alarm panel and
connected my butt-set directly to the panel on the return side. Within
a few seconds of going off hook with my butt-set, the alarm goes into
trouble and comes out of trouble when I go back on hook. I tested the
voltage on both sides of the panel. I'm still getting 50v dc on both
sides, but now I only get 5.5v dc when I'm off hook.

Also, after browsing the net I see that most people have a RJ31x jack
before the alarm panel. My original installer didn't put one in. My
telco line comes straight into the panel from the demarc.

Any ideas?

Jason

 

[mikey]

Check to see that the telco wiring to the control and RJ31X is wired
properly. You might have the incoming telco wired to the premises side.
js

I can't believe you said that. It wouldn't dial out and he'd get an FTC

 

[mikey]

Ok... Here is what I did this morning to test...

I disconnected the yellow/black pair coming out of the alarm panel and
connected my butt-set directly to the panel on the return side. Within
a few seconds of going off hook with my butt-set, the alarm goes into
trouble and comes out of trouble when I go back on hook. I tested the
voltage on both sides of the panel. I'm still getting 50v dc on both
sides, but now I only get 5.5v dc when I'm off hook.

Also, after browsing the net I see that most people have a RJ31x jack
before the alarm panel. My original installer didn't put one in. My
telco line comes straight into the panel from the demarc.

Any ideas?

What's the delay set to in section 370 ?


Jason

 

[Mark Leuck]

Best thing to do is turn off TLM, DSC 's implementation isn't very good

 

[Frank Olson]

mikey wrote:

I can't believe you said that. It wouldn't dial out and he'd get an FTC

It's called a "blonde moment" in real life.

It's called making a "Bass" in ASA.

 

[Frank Olson]

Best thing to do is turn off TLM, DSC 's implementation isn't very good

That's the first I heard of that. I've got a lot of DSC panels out
there and most have TLM enabled with *zero* problems. Must be the "US
version" stuff, eh?

 

[mikey]

ditto, I've extended the delay on the odd one, other than that, works well.

I'll never understand why they send the signals that didn't get through on
an FTC restoral though. Stupid feature. Telco repairs a cut line and police
respond after the fact. D'uh.

Best thing to do is turn off TLM, DSC 's implementation isn't very good

That's the first I heard of that. I've got a lot of DSC panels out
there and most have TLM enabled with *zero* problems. Must be the "US
version" stuff, eh?

 

[thesatguy]

Do you happen to have a cordless phone?
These will frequently drop the phone line voltage too low when you carry the
phone either out of range on nearly out of range.

 

[Mark Leuck]

ditto, I've extended the delay on the odd one, other than that, works well.

I'll never understand why they send the signals that didn't get through on
an FTC restoral though. Stupid feature. Telco repairs a cut line and police
respond after the fact. D'uh.

I could see that happen if the panel has sent a burg signal along with the
FTC, they can't tell WHEN the burg signal occured

 

[Pierre]

Having such low voltage from the line with only 1 telephone off hook is not
normal..

Here with 1 telephone i have more then 16 volt,with 2 i have ~9 and with 3
stll 6 volt...

i am sure you have a low audio level on that line..cause you must have a too
large resistance on the wiring from the telco,check for defective isolator
at the phone entrance too..there is (here in canada) some kind of carbone
surge protector on old line,those can make a lot of problem if they did
receive a jolt...