Nortel Networks NN43001-106 - Manual (Page 80)

80 10/20 Digit ANI on 911 Calls
The first 10 ANI digits provide the Calling Station Number (CSN). The CSN
for a 911 call is the Calling Party Number (CPN), if available, or the billing
number if the CPN is not available. The CPN, if available, is used to call the
originator back when a 911 call is disconnected.
The second 10 ANI digits, or Pseudo Automatic Number Identification
(PANI), provides the cell site and sector information to best define the
wireless calling party’s location. The PANI allows emergency assistance to
be sent to the correct area.
II digit definition
The 10/20 Digit ANI feature replaces the NPD with two II digits. The
definition of II digits is as follows:
• 40 for normal display
• 44 for flashing display (Default Routing)
• 48 for a test call
Note: The system uses an attached "*" instead of a "flashing display".
Default Routing is used when the Selective Routing process at the
Central Office does not produce a valid Emergency Service Number
(ESN). If no valid CSN information is available on a wireline call, or if
no valid cell site and sector information is available on a wireless call,
the call is sent to the default ESN associated with the incoming trunk
group for that call.
CSN wireline calls format
The CSN wireline call format is as follows:
KP II NPA NXX YYYY STP
Where:
• KP is the key pulse.
• NPA NXX YYYY represents the originator’s CSN.
• STP is a digit that tells the system that there is only 10 digits. Termination
of the call occurs immediately after receiving the STP digit.
CSN wireless calls format
The CSN wireless call format is as follows:
KP II NPA NXX YYYY ST KP X...X ST
Where:
• KP is the key pulse.
• NPA NXX YYYY represents the originator’s CSN.
Nortel Communication Server 1000
Features and Services - Book 1 of 6 (A to B)
NN43001-106 01.04 Standard
Release 5.0 27 July 2007
Copyright © 2007, Nortel Networks
.