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CG-EWCG-001 Wireless E911 Guide
Issue 3, January 6, 2004 BellSouth Wireless E9–1–1/SS7 Interconnection
Guide
In this mode the initial position of the mobile is also sent in the IAM.
Orreq
Parameters
ISUP Parameters Value
Digits(Dialed) Called party number (911) or PSAP DN (see Note 1
below) or ESRD
MDN
Calling party number CBN or the non-dialable number
used in lieu of a real callback
DMH_BillingDigits Charge Number (see Note 3 below) CBN or the non-dialable number
used in lieu of a real callback
GenericDigits Generic digits parameter (see Note 2
below)
ESRD
GeographicPosition Calling geodetic location geographic position (x, y)
n/a Originating Line Information (OLI) If included, use value 61 OR 62
NOTES:
1. 911 is used as the Called party number if the MSC uses dedicated trunks to the Emergency
Services Network Entity (ESNE) to route the Emergency Services Call (ESC). The directory
number of the PSAP is used as the called party number if the MSC uses a shared trunk to route
the ESC to the ESNE. The ESRD may be used on dedicated trunks that do not support the
ISUP Generic Digits parameter.
2. The Type of Digits field within the Generic Digits Parameter (IF USED) should be set to
indicate Location Identification Number. GDP MUST NOT BE SENT IF WRLS_CLD
signaling option is used at the NDET.
3. The Charge Number, Calling Party Number or both may be included in the IAM message.
Although Charge Number Parameter is allowed as an optional parameter, it is ignored by the
NDET when using either of the WRLS_xxx signaling options.
WARNING
Remember, Phase 2 CAS I
S NOT SUPPORTED
in BellSouth!
A.9 Cross Reference Tables to NENA TID 05-501 - SS7 Guidelines for MSC to
Selective Router Connectivity.
The intention of this section is to provide a way for a WSP to assess which type of BellSouth supported
SS7/ISUP signaling option can best fit their needs. Each decision MUST take into account the capability
of the WSPs MSC and the capability of the PSAP CPE, and may be impacted by the type of ALI steering
options involved.
Each of the following pages in this section represents a different interconnection scenario that is described
in NENA TID 05-501- SS7 Guidelines for MSC to Selective Router Connectivity.
Page 91