E911 Enhanced Operation - Toshiba Strata DK14 General Description Manual

Features
System Features

E911 Enhanced Operation

Strata DK14, DK40i, and DK424 systems support Enhanced 911 (E911) emergency services. This
feature uses special Centralized Automatic Message Accounting (CAMA) trunks to include the
Caller's Emergency Service Identification (CESID) in the 911 call. The local carrier delivers the
CESID to the Public Safety Answering Position (PSAP) which uses it to determine the exact
location (building, floor, office number, etc.) from which the call is originating.
Notes
Each station in the Strata DK may be programmed with a unique CESID. In some
jurisdictions, the CESID must be a valid directory number that the PSAP can call back if
disconnected. In many cases, this may require Direct Inward Dialing (DID).
In order for the E911 feature to be effective, 911 calls and 9+911 calls must be dialed from a
digital telephone DN or from a single line telephone. 911 calls originated from the CO Line
button or the Pooled Line button bypass the adjunct equipment and go directly to the CO
exactly as dialed.
Enhanced 911 is distinguished from conventional 911 by providing more precise information
about the location from which the 911 call originates. A conventional 911 call is identified to the
PSAP by the listed directory number of the organization providing the multi-line telephone
systems. Emergency service workers cannot determine the precise location of the caller with
conventional 911 and this results in services being misdirected, time wasted, potentially and lives
lost. Enhanced 911 provides a unique CESID for each telephone using it to identify the location of
the caller within a large, multi-floor building, multiple buildings within a campus type
environment, or from an off-premise station that is terminated at a different address than the main
telephone system.
The CESID is delivered to the PSAP by the local carrier. The PSAP then uses the CESID to
interrogate an Automatic Location Identifier (ALI) database that returns precise location
information. Once translated, this information becomes associated with the emergency call and
can be shared with responding agencies such as police, ambulance, fire, etc.
In some jurisdictions, the business owner is responsible for maintaining accurate
Note
information in the ALI database. Since Automatic Set Relocation allows telephones to be
relocated without the business owners knowledge, you may wish to turn Automatic Set
Relocation off.
For complete information on E911, please see the National Emergency Number Association's
home page at http://www.nena.org. The "911 Tutorial" at that address is particularly helpful.
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System Availability
Optional on Strata DK14/DK40i/DK424
Requirements
DK14/DK40i/DK424 - adjunct equipment
DK424 - RMCU/RMCS PCB
Strata DK Feature Description 5/99