TELECOM Digest OnLine - Sorted: Re: New Technology Poses 911 Peril VOIP Not Part of Emergency

Re: New Technology Poses 911 Peril VOIP Not Part of Emergency

Justin Time (
21 Apr 2005 05:26:17 -0700

Dave Garland wrote:

Of course. But is *sounds* like Vonage is in fact telling people.
There's no reason why the county 911 can't use CID on a non-911 line
to access their database, except that they don't want to be bothered.

The point is that CID can be blocked and is not guaranteed to be
delivered. The ANI information the 911 centers use is pretty much the
same data that feeds the telephone company billing system. That
information cannot be blocked or opted out of providing. Of course,
if you want the PSAP to use CID information to take emergency calls on
a non-emergency number and do the look-up from the CID it would be
permissible to have the PSAP lines configured for Anonymous Call
Rejection which would reject all calls that didn't have CID. That
would insure the PSAP had at least some information to work with.

[TELECOM Digest Editor's Note: On 'regular' 911, attempts to use *67
in front of it are ignored. A good way to phrase it is that on calls
to 911 the police always pay the bill (for the transit of the traffic)
and they _insist_ on getting the numbers of the calling parties, just
like on an 800 number; when someone else is paying, you get no choice
in the matter. I notice an interesting thing about Vonage and *67
also. *67 _does work_, but if you do *67-something else you'll hear
a distinct 'click' after the *67 has been dialed and a new dial tone
from some different switch it sounds like to me, jumps in and takes
the remainder of your dialing string. I dunno why ... but Vonage does
not accept *67-911 either, so there is no way the caller ID in those
cases would not get a story for its owners. PAT]

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