We just moved to a VoIP system and the 911 calls are routed through them but
with our address and number shown as the source. Part of the approval
process is us actually calling 911 with a test call and validating what they

In reference to previous posts on security, this company is addressing that
by us using a dedicated t1 through their offices. This way they control the
connection from our phone eventually to a POTS connection. This seems like a
decent idea for keeping folks who are not customers from disrupting the
system but I'm a little worried about those who are customers.


From: "Paul D. Robertson"
To: Yehuda Goldenberg
CC: firewall-wizards@honor.icsalabs.com
Subject: Re: FW: [fw-wiz] VOIP versus PBX
Date: Thu, 21 Jul 2005 15:58:43 -0400 (EDT)

On Thu, 21 Jul 2005, Yehuda Goldenberg wrote:

> I didn't ask about 911 tracking, but I would assume since all phone
> calls are handled centrally at their location, and they are providing
> the internet link and the phone service, they should be able to do 911
> tracking.

AFAIK VoIP services currently do *not* support E911. They can route 911
calls to their service center, or you can have the switch route to a local
number, but you will not get E911 service- that means the calling number
address won't show up at the local emergency call center, and responses
may be hampered because of it[1].

In a corporate setting, this is a risk call, since if someone has a major
injury on-site, and there's some address confusion or slow down you're
going to have to face a potential lawsuit in many situations. A loss
there could completely offset any savings.

[1] There's been some hoopla about it in residential situations,
including at least one "hey this might have prevented..." thing that's
probably been blown all to hell by the LECs who have just been forced to
give access to the 911 centers to VoIP providers, not sure if they'll
eventually include E911 service at some level.
Paul D. Robertson "My statements in this message are personal opinions
paul@compuwar.net which may have no basis whatsoever in fact."

firewall-wizards mailing list

firewall-wizards mailing list