WirelessE911 Guide CG-EWCG-001
BellSouth Wireless E9–1–1/SS7 Interconnection
Guide Issue 3, January 6, 2004
- continued -
ISUP
Parameter
Option
OLI
Wireless CpCAT
Emergency CdPN CPN CHGN GDP NDET
signaling
option
Note(s)
K2 No Yes ESRD CBN Blank ESRD WRLS_STD 3
L1 No No ESRD CBN CBN ESRD WRLS_STD 3
L2 No No ESRD CBN Blank ESRD WRLS_STD 3
NOTES:
1. This ISUP parameter option is widely supported in the U.S. It is estimated that 95% of the
E9-1-1 selectiverouters deployed in the U.S. support this option when the selective router has
been equipped with wireless E9-1-1 features.
2. "Blank"-- this parameter MUST NOT be populated.
3. This ISUP parameter option is availablein some areas. It is estimated that 50% of the E9-1-1
selectiverouters deployed in the U.S. support this option when the selective router has been
equipped with wireless E9-1-1 features.
A.10 Attachment "A" - CPCat & OLI NotesA.10.1 Calling Party Category parameter (CPC):
Prior to NA013 the Nortel DMS E9-1-1 Tandem (NDET) did not set or reference the CPC parameter
in the IAM of ISUP calls for E9-1-1 purposes.
In NA013, feature 59006371 entitled "E9-1-1 ISUP Enhancements" implemented setting the CPC
parameter in the outgoing IAM of ISUP E9-1-1 calls to "EmergencyService Call" which is a value of
#E0. This was to fulfill Telcordia standards. Even though theNDET begansetting the CPC parameter, the
logic still did not require this value to be set to recognize E9-1-1 calls.
InNA016, feature 59029627entitled "E9-1-1 ISUP and LogEnhancements" introduced a newBoolean sub
fieldnamed DEDICATDfor the E9-1-1 option on ISUP IT trunks incoming to the tandem. If this Boolean
valueis set to Y,the NDET assumes the trunk is dedicated to E9-1-1 traffic and the NDET does not check
the CPC parameter. If the DEDICATDBoolean is set to N, the NDET assumes the trunk is being shared
for both E9-1-1 and non-E9-1-1 traffic,and the NDET checks the CPC parameter to identify E9-1-1 calls.
A.10.2 Originating Line Parameter (OLI):
Prior to NA013 the Nortel DMS E9-1-1 Tandemdid not set or reference the OLI parameter in the IAM of
ISUP calls for E9-1-1 purposes.
In NA013, Nortel feature 59006371 entitled "E9-1-1 ISUP Enhancements" implemented setting the
OLI parameter in the outgoing IAM for wireless E9-1-1 calls to "Cellular Services Type 1" (#3D) if the
originating officedid not send the parameter. If the originating office sends the parameter, the NDET does
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