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Versus cellular backup units

Discussion in 'Security Alarms' started by dep_blueman, Jan 7, 2004.

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  1. dep_blueman

    dep_blueman Guest

    Does anyone have any information about the Versus cellular backup
    units? Their web site has nothing and I can't find any additional
    info. on any other Web site that I have found so far.

    The units are clearly a voice ch. product that produce a dial tone to
    the alarm system on a line cut condition. They also seem to be able
    to function (if not used as alarm backup) as a fixed cellular voice
    product with a handset attached to the transmitter.

    Any info. would be great. Links to manuals, spec sheets, etc.

    Thanks. Devin
     
  2. dep_blueman

    dep_blueman Guest

    Well, I did not get a ton of replies to my inquiry about the Versus
    cellular backup units. So, now that I have had a chance to play with
    one I will post what I learned in case it is of interest to anyone
    down the road.

    There are two main parts to this unit: the cellular transceiver and
    the alarm interface board.

    The cellular transceiver looks to be a 'standard' type unit with a
    flip up flexible low gain antenna, port for 12v in, handset, and
    accessory. It also has a coax jack at the top for an external antenna.
    It was clearly designed to function like a 'desk' phone in that the
    handset attaches to the base just like you would find in a slimline
    POTS phone. Output appears to be (but I can not confirm at this time)
    3 watts. It is connected to the alarm control board via the accessory
    port (like an ethernet cable port) and power jack. In my case it is
    being serviced by Verizion AMPS and even has its own phone number :) I
    assume it would ring if I rigged it up correctly.

    The alarm control board has a number of jacks: POTS in, POTS out,
    transceiver, power, battery, and alarm trigger. The phone line from
    the house plugs into the board and another cable takes it to the alarm
    panel. A standard 12v power supply is used as is a standard 4 or 7 amp
    hour gel-cell 12v battery. The unit will not dial out without the
    battery. There is an LED that indicates if the unit is 'on line'
    meaning that it is providing a dial tone to the alarm panel, if it has
    power, and a diag. light that indicates the signal strength and any
    trouble conditions. While the hardware is new the firmware on the
    control panel is dated 1996.

    In normal running mode the phone is not energized and the control
    panel is in a wait state. When the panel triggers the board (in my
    case when the panel in is LINE CUT condition and there is an alarm to
    report) the board energizes the phone and simulates a dial tone to the
    alarm panel. The panel sees the dial tone as just another phone line
    and dials away. The control board takes care of converting the DTMF
    codes to something the cell phone understands and connects the call.
    Since the alarm panel knows it is sending over the secondary line it
    sends, in addition to the other normal info, a code to tell the CO it
    is a cellular report and to not bother calling the land line. One good
    thing is that if you get a non-burg alarm like CO or water you get the
    full report at the CO even if the land line is down. All in all it
    works very well and takes about 2 seconds longer to connect and xmit
    the alarm than the POTS line does. There is a medium gain antenna (my
    guess is 2-4db) attached directly to the coax port but it would easy
    enough to attach a high gain remote antenna if needed.

    With a little programming of the alarm panel and/or control panel you
    could easily get it to function like the Tellular units and provide a
    dial tone to the house phone system. You would just need to be able to
    tell the alarm panel to keep that trigger open full time and then
    re-route the wires so the hone phone goes into the control board. I
    don't plan on playing around with that, however :)

    -D
     
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