Nortel Networks SRG 50 NN43001-307 - Manual (Page 201)

Configuring the NRS for ESA SPN 201
The use of the terms Normal Mode and Local Mode apply to SRG branch
user only.
Emergency Services while logged in to Virtual Office
The E911 Virtual Office feature recognizes when a user dials an ESDN and
it forces the Virtual Office IP Phone to log out of Normal Mode (into Local
Mode) in order to place the emergency call directly from the branch office
location to the PSAP.
Emergency Services while logged out of Virtual Office
If 911 is dialed while logged out of Virtual Office the LTPS redirects the 911
call to the local 911 service (PSAP), not the remote Call Server 911 service.
The Call Server is provisioned with Emergency Services Access Terminal
Numbers (ESTN). The ESTN is used to register the IP Phone with the Call
Server. The logged out IP Phone can make ESA calls only.
For more information on emergency services for Virtual Office, see
Emergency Services Access Fundamentals (NN43001-613) and Branch
Office Installation and Commissioning (NN43001-314).
On-Site Notification
The ESA On-Site Notification (OSN) function notifies local security
personnel when an emergency call occurs. When an emergency call is
placed at the branch office, an external tool traps the notification and
records an alarm. This applies to IP Phones that the main office returns in
local mode when an emergency call is made, as well as locally connected
analog (500/2500-type) telephones.
A LAN port must be enabled on the SRG to support the external tool. For
more information, see SRG50 Configuration Guide (NN40140-500).
Configuring the NRS for ESA SPN
The NRS must be configured for the ESA Special Number (SPN). The
NRS uses the ESA SPN to route the emergency call from the main office
to the branch office.
Nortel recommends that a consistent pattern be followed for all ESA calls.
For example, use 0 + ESN Location code of the branch office node + the
ESDN. An example for location code 725 would be: 0725911. The zero is
recommended to prevent a collision in the ESN data with the HLOC entry.
For more information, see IP Peer Networking Installation and
Commissioning (NN43001-313).
Nortel Communication Server 1000
Main Office Configuration Guide for SRG 50
NN43001-307 02.02 Standard
Release 5.0 3 December 2007
Copyright © 2005-2007, Nortel Networks
.