The functions of the operator services system are distributed among a Core System and several subsystems. Some of the data required
for the operator services system to function is stored in internal databases in the Core System and subsystems. This Generic
Requirements (GR) document describes the view of Telcordia on the internal system tables and other internal data for the Core System
and subsystems, Service Provider ID for Originating Line Number Screening (OLNS), the OLNS Disallowed Card Issuer Code (DCIC) feature,
and definition of domestic calls for OLNS.
ISS 02 REV 01 This Revision to GR-1157 states the preliminary view of Telcordia on proposed additional requirements for an internal
Operator Services System (OSS) table to determine the facilities to be used to complete an intraLATA local call from the OSS as
selected by the Service Provider identified in the Originating Line Number Screening (OLNS) response.