VOIP for emergency phones?

Discussion in 'VOIP' started by Roger Elmore, Nov 12, 2003.

  1. Roger Elmore

    Roger Elmore Guest

    Has anyone implemented VOIP as a carrier for emergency or elevator
    call boxes? I realize that you could hook these analog ringdown
    phones to an ATA, but I was curious about the Life Safety
    requirements. What is necessary to bring VOIP up to the level that is
    expected of a TDM switch?

    Before I spend $80 of the taxpayer's money, is this issue addressed in
    the NFPA 101, Life Safety Code?

    Thanks in advance for any replies.
    Roger Elmore, Nov 12, 2003
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  2. Roger Elmore

    shope Guest

    Cisco have some specialised 911 server stuff - dont know much more than that
    as i am UK based.

    Marconi build a class 5 IP softswitch with lots of emergency service stuff,
    based around their older TDM public switch software. I believe many other
    manufacturers are going in a similar direction.

    you probably have to think about UPS for the Voip bits of your network all
    the way to the local wiring closet - it may be easier to stay with analog
    and power over the twisted pair.
    shope, Nov 12, 2003
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  3. Roger Elmore

    SPD Guest

    I don't have a great answer for you either. We are trying to address
    this issue but switching from Centrex to VoIP makes people
    question the reliability and availability of the IP phone service,
    as well as location accuracy, when ironically enough our
    Telecom staff admits to a 20% inaccuracy rate in their
    current location data which is fed to Public Safety.

    Anyway we are looking at a redundant routing core and
    layer 2 switched environment with UPS for key
    network electronics. We are looking location technology
    for IP phones but we have yet to find a good solid solution.
    SPD, Nov 12, 2003
  4. Roger Elmore


    Sep 11, 2008
    Likes Received:
    Dallas, Texas
    VoIP for emergency phones

    the previous posts are all correct. After five years of working with VoIP and thirty years with elevator emergency phones, I've found the VoIP emergency phone service as simply too risky and recommend sticking with analog drops for just the emergency service--even with UPS power.

    Elevator emergency phones, if provided, involve tremedous liability exposure. If provided, they must be fully ADA compliant and connect via a 'ring-down' circuit to a response center that will answer 24x7 within seconds of a call. So, VoIP is just a fraction of the total problem. Also, there's the problem of getting a super flexible CAT5e cable down the elevator traveler cable--which I have not yet found a solution for. Every elevator traveler cable I've ran across alway had an extra one or two pair shielded cable available for analog phone service, but super flexible CAT5e to support VoIP and PoE is a real problem. Also, I've searched and not found an ADA compliant VoIP elevator emergency phone! That means no handset, no dialing, manadatory visual connection indication, appropriate standard braile lettering and a timeout-disconnect feature.

    Best of luck with your work and thanks for the sanity check! You are facing a problem that has, or will, hit millions of industry faciliity and telecom managers as they switch over to VoIP.

    God bless our troops,
    JMyers, Sep 11, 2008
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