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RE: dry pair
- From: Randy Neals (ORION)
- Date: Fri Aug 29 18:32:48 2003
>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.