[kwlug-disc] OT: Dumb VoIP questions

Tudor Holton tudor at tudorholton.com
Thu Mar 22 00:15:30 EDT 2012

This could be a case of the blind leading the blind, but...

My understanding is that E911 is geographically connected to the 
emergency service via an emergency telephone trunk.   This is distinctly 
different from Caller ID, which is just a signal sent along with the 
"ring" packet.  So it is exceptionally easy to fake Caller ID, whereas 
E911 will shortcut at the nearest network switch to jump to the 
emergency service trunk which ends up at a local emergency service 
centre (or designate).  So no need for a number at all.  It won't be 
your number in a database, it will be that your VOIP connection is not 
listed as being able to make that jump.


On 12-03-22 12:03 AM, Paul Nijjar wrote:
> Dumb Question 2: I have a POTS line and a VoIP line, using voip.ms . I
> set the Caller ID of the VoIP line to the POTS line. Do I need to sign
> up for E911 service on the VoIP line now? I signed up using the VoIP
> number, but when I tested the connection by dialing 1-555-555-0911 I
> was told that the test failed because the number (which was the Caller
> ID number) was not in the database. So I am confused.
> - Paul

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