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weird Telco problem

J

John

Jan 1, 1970
0
Had a customer call with a problem. Panel appeared to be dialing out and
holding the line..(C/K236)

Tested this panel on another telco line at a different location and found
that it dialed the station, connected and and released without a problem

Told them it is a telephone company problem. Telephone company came out
and insisted the line is fine.

Returned and reinstalled the panel, same problem. Tried a different make
and model of panel, same problem.(Vista20P)

Put my butt set on the line. After dialing any number, there is a pause
before connecting and I can faintly hear 5 digits being dialed. Tried this
from outside of the house at the main box with all interior lines
disconnected, and get the same . I suspect the panels are hearing this as
an instruction and hanging on the line or redialling.


Is it possible there is some sort of remote dialer or line tap on this line,
on the telephone companies end? If so, would the service tech the telephone
company sends out know about it?

Any ieas would be appreciated.

john
 
P

Paul

Jan 1, 1970
0
I had a similar problem years ago.
It turned out that there was a faulty earth somewhere within the building.
Not sure where, but I fixed my problem by disconnecting the earth to the
alarm panel and suddenly the panel could be heard by the control room again.
Might not be the same problem but might be worth a try.

Paul.
 
N

Nick Markowitz

Jan 1, 1970
0
Had similar problem with digital phone lines interupting
with side carrier and redail noise swicted to contact id format which has
solved most noise and digital phone line noise

--
Nick Markowitz Jr.
Owner
Markowitz Electric Protection
Private Industry Fire Investigator

Exclusive Correspondant North Boroughs Fire news.com
Contributing Editor Pa. Firemans Magazine
Contributing Writer www.SecurityMission.com
Senior Corespondant 1st Responder news
 
A

ABLE1

Jan 1, 1970
0
Ranger,

What you describe sounds like the dialer could not break dial tone due to
the frequency requirements of your PBX. Back when the Sentrol/Moose ZX400
first came out I had a similar problem with on local CO Switch. Turned out
that this local switch (which I understand was the worst) and about 4 others
in the country were really tight on the tolerance of the DTMF. Also, the
new dialer used some stepping sequence chip to generate the tones. Between
Sentrol engineers and myself we started to change resistors and capacitors
but the final resolve was a newly programmed tone generator chip. After
that change was made all worked as it should.

This may not help your with your problem but may at least give you an idea
of what might be going on.

Sounds to me like your PBX is tweaked too tight.

Les
 
A

ABLE1

Jan 1, 1970
0
Ranger,

Under those conditions I hope your problems are small from now
on.......................

Good luck and have a better day,

Les
 
R

robert

Jan 1, 1970
0
Robert wrote:

First question that came to mind was did you hook up your butt set at the
telco demark. Ahead of the KSU or PBX. Try to dial out and see if you get
the same result. If the problem disappears then hook up the alarm panel
telco connection there and not after the demark. Hook the butt set up and
let the panel dial out. Listen for the dialing sequence, and make sure that
you hear the central station handshake, signals sent, and kiss-off tone. If
you hear the correct sounds of everything going through to the central
station, and you call them and they say no signals were received. Check the
account number and phone number. I have had central station personnel hook
me up with the wrong receiver for the format that I'm sending, If you hear
nothing pick up go to the panel and check the central station phone number.
Call the central station and verify they gave you the right number for the
format you intend to send. I have had installers overlook this simple
mistake and fuss over the panel for hours. If you can dial out on your butt
set then the panel should as well. For some telco switches you may have to
enter delays in the dialing sequence so that the panel can see dial tone.
Also check your programming and see if you checked off dial tone detect.
If you said no then the panel maybe trying to dial before dial tone is
generated from the telco CO.
 
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