Instruction manual

Page 2042 of 3156 Meridian 911
553-3001-306 Standard 10.00 January 2002
The Automatic Number Identification (ANI) of a 911 call consists of eight
digits (a Numbering Plan or Information digit followed by the seven digits of
the calling party number). Whether the first digit of the ANI string is to be
interpreted as a Numbering Plan Digit (NPD) or an Information Digit (ID)
depends on the trunk interface and Meridian 911 configuration.
Note: The 10/20 digit ANI on 911 calls feature brings Meridian 1
systems into compliance with the Federal Communications Commission
(FCC) decision that requires a private branch exchange (PBX), working
as a Public Safety Answering Point (PSAP), to accept a 10 or 20 digit
ANI when terminating 911 calls. For more information on the 10/20
Digit ANI on 911 Calls feature, please refer to the “10/20 Digit ANI on
911 Calls” on page 79.
The Automatic Location Identifier (ALI) host computer uses the ANI to
locate the ALI record for the calling party number. This includes the name
and address, and whether the line is business or residence. An enhanced 911
system creates ALI information from the ALI record and automatically routes
the ALI information to an optional data terminal display at the answering
center.
An enhanced 911 system routes all emergency calls from the originating
Central Offices through an E911 Tandem, sometimes called a 911 control
office, to the primary answering center. There, using Selective Routing
features, a call taker can transfer the call through the public network by
signaling the E911 Tandem. The Autodial Tandem transfer feature can be
used for this. For example, if the primary answering center transfers calls to
several fire departments, it uses one fire department button. The option
automatically:
• identifies the fire department associated with the caller’s location, and
• transfers the call to that department.
Meridian 911 (M911) system
The Meridian 911 system:
• gives priority to emergency calls
• routes priority calls, without interrupting service, to answering positions
that can identify and dispatch the assistance required with minimum
delay