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Common Channel Signaling (CCS) Network Interface Specification Supporting Toll-Free Service


Document Number GR-1428
Issue Number 02
Issue Date May 1995
Replaces TA-NWT-001428 Issue01
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    ABSTRACT: Toll-Free Service is an example of a telephone company Number Service in which a special code, "800, 888, 877, etc.," indicates that
    the call requires special treatment. The digits following the code determine the routing of the call. It has become necessary to be
    able to route these toll-free calls to specific Interexchange Carriers (IXCs) or within the telephone company. Such routing varies
    depending on the arrangements made between the customer and the carriers and may include different routing based on the time of day,
    day of week, and location at which the call originated.

    This Generic Requirements (GR) document provides information for the interconnection of Local Exchange Carriers' (LECs') Common
    Channel Signaling (CCS) networks with Interconnecting CCS Networks (ICNs) to support Toll-Free Service in an Intelligent Network (IN)
    environment. The document describes several interfaces between an ICN and the LEC network for Toll-Free Service. This document is a
    companion document to GR-905, Common Channel Signaling (CCS) Network Interface Specification (CCSNIS) Supporting Network
    Interconnection, Message Transfer Part (MTP), and Integrated Services Digital Network User Part (ISDNUP),
    and GR-1432, CCS
    Network Interface Specification (CCSNIS) Supporting SCCP and TCAP,
    and supplements the basic information in them for Toll-Free
    Service.

    GR-1428 replaced TA-NWT-001428.

    When using GR-1428, you may need to refer to GR-905, GR-1432, GR-246, GR-317, GR-394, and/or GR-533. You
    may also want to refer to TR-NWT-000444, GR-1100, GR-2901, and/or TRA-LAP.

    Components of this product are:
    GR-1428-CORE

    Table of Contents:

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