Configuring Location-Based Emergency Routing - AudioCodes Mediant 800B User Manual

the E9-1-1 callers. The following example shows IP-to-IP routing rules for E9-1-1 in a Skype for
Business environment:
Figure 15-58: Example of IP-to-IP Routing Rules for Skype for Business E9-1-1

15.8.4.5 Configuring Location-Based Emergency Routing

The device identifies the geographical location of emergency callers by their ELIN numbers,
which is present in the PIDF-LO XML body of received SIP INVITE messages. Therefore, you
need to configure the device to route emergency calls to a destination (i.e., emergency center
such as police) that is appropriate to the caller's ELIN number. As the destination of incoming
calls is the emergency number (e.g., 999), the device needs to manipulate the destination
number to a number that represents the caller's local emergency center (e.g., +4420999 for
London police).
Note: Location-based emergency routing is applicable only to the Gateway application.
To add manipulation rules for location-based emergency routing, you need to use the Destination
Phone Number Manipulation for IP-to-Tel Calls table. In this table, you need to use the ELIN
number (e.g., 5000) as the source prefix, with the "ELIN" string value added in front of it (e.g.,
ELIN5000) which is used by the device to identify the number as an ELIN number (and not used
for any other routing processes etc.). For each corresponding ELIN source number prefix entry,
you need to configure the manipulation action required on the destination number so that the call
is routed to the appropriate destination.
Following is an example of how to configure location-based emergency routing:

Assumptions:
•
Company with offices in different cities -- London and Manchester.
•
Each city has its local police department.
•
In an emergency, users need to dial 999.
•
Company employs Microsoft Skype for Business for communication between
employers, and between employers and the external telephone network (PSTN). In
other words, all employers are seemingly (virtual) in the same location in respect to the
IP network.
•
ELIN numbers are used to identify the geographical location of emergency calls dialed
by users:
♦
♦

Configuration Objectives:
•
Emergency calls received from London office users are routed by the device to the
London police department (+4420999).
•
Emergency calls received from Manchester office users are routed by the device to the
Manchester police department (+44161999).
The international code, +44 for England is used for IP routing considerations, but can be
omitted depending on your specific deployment.
The above scenario is configured as follows:
1. Enable location-based emergency routing, by loading an ini file to the device with the
following parameter setting:
User's Manual
London ELIN is 5000.
Manchester ELIN is 3000.
Mediant 800B Gateway & E-SBC
302 Document #: LTRT-10298