Re: Who has a security system and dialup?

[Milhouse Van Houten <none@xxxxxxxxx>]

mm wrote:

>>It's NOT a standard jack - It's an RJ-31x.  It has shorting pins
>>inside, so when the cord gets disconnected the shorting pins allow the
>>phone voltage to go back out to the NID - (when it's plugged in the
>>panel's relay does it)
>
>Thanks. Didn't know about those.  Is that so someone in the house
>won't accidentally unplug the alarm and defeat the phones?  Since I'm
>the only one that lives here, that's not a risk for me. Is there
>another reason?
>
>I'll remember about these jacks if I talk to others again.
>
>Hmmm. If it has shorting pins, does that mean all he has to do is to
>unplug the phone wire from the jack and that will be the same as
>bypassing the burglar alarm?  That would be really easy.


If the OP want's to sort out what we have talked about, then let's
wait until he has more questions.  We have gone way beyond his skill
level if he is a novice.

The RJ-31x is an FCC requirement.  It is intended as a disconnect from
the alarm panel if things go awry.  If the dialer locks up for
instance, the customer needs a way of defeating line seizure to get
his telephone back - so he simply unplugs the cord from the RJ-31X and
then the shorting pins will allow the telco voltage to flow back to
the NID (where the house phone wires are spliced), bypassing the
control panel's relay that usually handles it.


Control panels should be located in an area that is not easily
accessible by a burglar, in a closet for instance.  The RJ-31x should
ALWAYS be mounted outside the panel (not in the can) per. FCC
requirements.. this is a security risk, yes... But nonetheless is
required.

You are right about unplugging the jack..  But "we" are betting the
burglar cannot find the jack in time to prevent the alarm
transmission.  I place my panels up high too, so he would need a
ladder even if he did find the jack within the 30 second delay period
(if he kicked in a delay door) - other zones are instant..So there is
no time to find the jack.

There are other ways to circumvent the dialing, but will not be
discussed on an open forum.