BellSouth E911 - Manual (Page 98)

Wireless E911 Guide CG-EWCG-001
BellSouth Wireless E9–1–1/SS7 Interconnection
Guide Issue 3, January 6, 2004
their BellSouth account team for details on how the WLS911 Solution may be of value in their overall
architecture plans.
Orreq
Parameters
UP Parameters Value
Digits(Dialed) Called party number (see Note 1
below) 911
MDN (aka: CBN) Calling party number (see Note 3
below) 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 (see
Note 3 below)
GenericDigits Generic digits parameter (see Note 2
below) ESRD
GeographicPosition Calling geodetic location n/a
n/a Originating Line Information (OLI) If included, use value 61 OR 62
NOTES:
1. 911 is used as the Called party number. In BellSouth the MSC MUST use dedicated trunks to
the Emergency Services Network Entity (ESNE) to route the Emergency Services Call (ESC).
2. The Type of Digits field within the Generic Digits Parameter should be set to 01101 (decimal
13) to indicate Location Identification Number .
3. The Calling Party Number MUST be included in the IAM message. The Charge Number may
also be included in the IAM, but if so it MUST be the SAME as the Calling Party Number.
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.
A.8.3 ISUP Initial Address Message Parameter Contents for NCAS (NDET uses
signaling option WRLS_CLD because MSC cannot support GDP)
As this signaling option’s name implies, this should only be used on trunks handling wireless traffic
exclusively. This type of signaling (WRLS_CLD) looks for the pANI in the Called Party Number
parameter rather than the Generic Digits Parameter. It uses the Calling Party Number parameter as the
callback number. Signaling type WRLS_CLD assumes the Called Party Number is always the pANI. This
signaling option (WRLS_CLD) IS NOT TO BE USED IF WIRELINE COMPATIBILITY MODE
IS DESIRED (use E911_STD instead). The need to use WRLS_CLD is assumed to be the result of a
situation where the WSP’s MSC switch cannot support a GDP parameter. In that case the pANI would
appear in the Called Party Number parameter, as long as WCM is NOT desired.
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