[cisco-voip] Hotel Murder Linked to E911 Programming

[Anthony Holloway]

This is learning a lesson in phone system ownership, and administration, in
the hardest way possible.

On the topic of 911 strategies, I too allow both 911 and 9911 to go out.  I
have even thought about allowing other PSTN access codes to go out as well.
 E.g., 8911.  Though I have not yet done this.  Anyone else?

On the topic of mitigating miss-dials, I leverage the CUCM CURRI API to
play an announcement and then route the call.  The announcement can be a
blank audio file of any duration, giving you a way to control delay outside
of T302.  Additionally, a short announcement such as "Routing your call to
emergency services" followed by a short 1 or 2 seconds of silence to allow
the caller time to react and hangup if it is a miss-dial is also possible.

The CURRI API is implemented in CUCM as External Call Control Profiles and
has a fail open safety mechanism.  So, if for any reason CUCM cannot
leverage the feature, the call simply routes.


On Tue, Jan 14, 2014 at 2:28 AM, Heim, Dennis <Dennis.Heim at wwt.com> wrote:

> I have always told customers that 911 must go out to the PSAP. If they
> only want to allow 9-9-1-1, then they need to place stickers on the phones.
> That usually causes them to do 911. In an attempt to avoid miss dials, I
> have inserted a delay by changing the 911 pattern to 911? And changing the
> inter-digit (T.302) timers to 5000-7500 ms.
>
> Dennis Heim | Solution Architect (Collaboration)
> World Wide Technology, Inc. | 314-212-1814
>
> PS Engineering:  Innovate & Ignite.
>
>
> -----Original Message-----
> From: cisco-voip [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of
> Coy Hile
> Sent: Monday, January 13, 2014 8:29 PM
> To: Adam Piasecki
> Cc: cisco-voip at puck.nether.net
> Subject: Re: [cisco-voip] Hotel Murder Linked to E911 Programming
>
>
> On Jan 13, 2014, at 6:35 PM, Adam Piasecki <apiasecki at midatlanticbb.com>
> wrote:
>
> > I install CUCM along with CER at Hotels and I've always just allowed 911
> to go out. I get people dialing 911 by accident but it's better then
> someone not getting out.
> >
> > Adam
>
> I've done the same thing on my personal lab setups (which double for voice
> at the house), and I've personally seen PD respond to one of my company's
> offices because someone dialed 9-1-1 rather than 9-011-<XXXX> for an
> international call.
>
> Like others have said, better to have an accidental call than to have a
> call not go out.  I don't know any first responder personally who disagrees
> with that sentiment.
>
> -
> Coy Hile
> coy.hile at coyhile.com
>
>
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