Full Description

Network Maintenance: Alarm and Control for Network Elements

Document Number GR-474
Issue Number 02
Issue Date May 2011
Replaces TR-NWT-000474 Issue04

    ABSTRACT: Minimize the Effects of Failures on Network Performance

    GR-474 provides the view of Telcordia on the proposed generic requirements that pertain to the Fault and Performance Management functions in transport and switching Network Elements (NEs) used for alarm surveillance and control. Specifically, alarm surveillance and control functions within an NE can generate two types of maintenance information: 1. Information related to the quality or health of the transmission signal, and 2. Information related to its own internal environment.

    Additionally, this GR describes the overall process that is applied to the network to minimize effects of failures that impact network performance. They include the information required to locate and repair troubles, as well as the description of the User System Interface at the NE(s).

    What's New in Issue 2?

    • Coverage of Performance Monitoring and Environmental Alarms
    • Operation and Management of External Controls
    • Coverage of Automatic Restoration, Protection and Synchronization Switching, NE Safeguards, and Forced Commands
    • Addition of Alarm Report Control from ITU-T Recommendation M.3100
    • Addition of Tandem Connection Monitoring from ITU-T Recommendations G.707 and G.709
    • Other Functional requirements and objectives that reflect ITU-T and T1 industry standards developed since Issue 1 was published.
    The following documents were fully or partly replaced by GR-474: TR-NWT-000474, TA-TSY-000047, TR-TSY-000509, PUB-43803, and PUB 49002.

    When using GR-474, you may need to refer to GR-284, TR-TSY-000473, and ANSI T1.231.

    You may also need to refer to GR-499, TR-TSY-000010, GR-57, GR-63, GR-78, GR-199, GR-253, GR-303, GR-454, GR-478, GR-496, GR-820, TR-TSY-000821, GR-833, GR-834, GR-836, GR-909, GR-1244, and/or MDP-326-140 (replaced PUB-43801).

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