[VOIPSEC] Spoofing VoIP caller ID to correct location

[Mark Fletcher]

Nathan-

When you do this, this is commonly called using an ELIN (Emergency Location
Identification Number). This is actually what all systems do to address E911
from nomadic or mobile devices. In order for this to work, you need to
physically be in the same E911 Selective Router Zone as the outbound trunk
the E911 call will use, and you need to use either a PRI circuit or CAMA
trunks that allow Calling Number / ANI information to be dynamically sent.

For example, NJ is a single Selective Router Zone, so manipulating the
Calling Number works just fine. It would not work, however, if the user was
in PA, and the trunks were in NJ. Some states have many Selective Router
Zones, some have a few, and some only have one. You need to understand the
Zone boundaries for your area. Don't get this confused with a PSAP service
area or zone. The two are very different.

To understand the capabilities for your NEC PBX, you should contact NEC and
ask them what E911 capabilities are available in your system.

Mark J. Fletcher
Sr. Systems Engineer 
Nortel

SIP/Email: fletch at nortel.com
Visit Nortel on the web at http://nortel.com
 
 

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-----Original Message-----
From: Voipsec-bounces at voipsa.org [mailto:Voipsec-bounces at voipsa.org] On
Behalf Of Nathan Paulhus
Sent: Tuesday, June 28, 2005 10:50 AM
To: Voipsec at voipsa.org
Subject: [VOIPSEC] Spoofing VoIP caller ID to correct location


Greetings,

Is there any way I could legally spoof caller ID so when using voip phone 
for 911 in a remote office they will get a local number so they respond to 
the right location? We have a regular landline in the office also.

We had an incident and 911 responded to the main office where the voip goes 
out adn not the remote office.

I know there has been much talk about this lately. Any suggestions?

NEC 704i PBX and NEC i-series VoIP gateway.

Thanks,

Nathan
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