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DEFINITY Enterprise Communication Server Release 9
Getting Started with the Avaya R300 Remote Office Communicator
Issue 1
November 2000
Avaya R300 Specifications and Network Design
28911 Emergency Assistance calls
2
911 Emergency Assistance calls
The Avaya R300 serves to transparently extend the DEFINITY capabilities to a remote
location. The effect of this is that the endpoints connected to the Avaya R300 function as if
they were directly connected to the DEFINITY. The endpoints share the same dial plan
and have access to the full complement of functionality provided by the DEFINITY.
While feature and access-transparency are fundamental attributes of this solution, they
also interfere with accurate delivery of 911 calls.
Development of an E911 strategy for the Avaya R300 ensures that emergency assistance
calls are routed to the appropriate PSAP. The absence of a Avaya R300 911 strategy would
potentially result in 911 emergency assistance calls from Avaya R300 endpoints being
routed to the Public Safety Answering Point (PSAP) assigned to the main DEFINITY. The
calls should be routed to the PSAP designated to field emergency calls originating from
the Avaya R300 location. The Avaya R300 911 strategy has two requirements:
■ 911 calls originating from stations connected to an Avaya R300 must be
selectively routed to the PSAP servicing the Avaya R300 location, and not to the
PSAP servicing the controlling DEFINITY.
■ Avaya R300 911 calls must be accompanied by correct automatic number
identification (ANI) or caller ID information.
The Avaya R300 911 strategy takes advantage of the ability to associate a location
designation with each Avaya R300. Each DEFINITY system has the capacity to support
up to 44 locations. Accordingly, each DEFINITY provides the ability to accurate route
911 emergency access request calls to these locations. It is possible to support more than
44 Avaya 300s using this strategy if multiple units are associated to a single location. In
cases where one DEFINITY is to support more than 44 Avaya R300 units, and these units
do not map to 44 locations, this strategy must be augmented.
If a maximum of 44 locations is insufficient to accommodate a complex Remote Office
configuration, accurate 911 call routing can be achieved using ARS Partitioning in
conjunction with locations. This allows up to eight different routing options per location.
Although the DEFINITY administration to accomplish this is fairly complex, this strategy
provides sufficient routing alternatives to support the maximum number (250) of Avaya
R300 units that can be maintained by a single DEFINITY.
The following diagram is an example of a DEFINITY Remote Office configuration with
two Avaya R300 units connected via a LAN or T1 interface to a central controlling
DEFINITY. One Avaya R300 is located in Holmdel, New Jersey, and the other is located
in Denver, Colorado. The controlling DEFINITY is located in Chicago, Illinois. Consider
the following diagram as a portion of a Remote Office configuration that exceeds 44
locations, and therefore requires the use of ARS Partitioning to support accurate delivery
of 911 calls.