[61544] in North American Network Operators' Group
RE: dry pair
daemon@ATHENA.MIT.EDU (Randy Neals (ORION))
Fri Aug 29 18:30:43 2003
From: "Randy Neals (ORION)" <randy.neals@orion.on.ca>
To: "'Patrick Felt'" <pfelt@quintam.com>, <nanog@merit.edu>
Date: Fri, 29 Aug 2003 18:29:55 -0400
In-Reply-To: <001201c36e6f$76874e70$070e46a6@patrico>
Errors-To: owner-nanog-outgoing@merit.edu
>How would an alarm company get around this? Would Qwest need
>to run copper into the neighborhood if any one of the people
>purchased an alarm? If not, how would the alarm company get
>the signal pushed through the fiber, and could that be done
>with the dsl signal?
Most home/small business alarm systems use a digital dialer and use a
regular dial up phone line.
The alarm system dials the alarm monitoring station then uses a low
speed data protocol to report the alarm.
Of course if the line is cut the alarm can't get through.
For businesses that are required to have a monitored/dedicated line on
their alarm there is a newer technology called "DVACS" which uses a low
speed Frequency Shift F1/F2 modem to communicate alarms over a
voice-band private line.
Voice-band (300-3000Hz) private lines as well as 56K/64K DDS and ISDN
digital lines can be provisoned over most DLC/SLC fiber systems.
-Randy
