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DS1 Automatic Facility Protection Switching (AFPS) Feature for Digital Terminal Systems Requirements and Objectives

Document Number TA-TSY-000435
Issue Number 01
Issue Date Feb 1987

    ABSTRACT: This Technical Advisory (TA) provides the preliminary view of Telcordia on generic criteria on the DS1 (1.544 Mbps) Automatic Facility
    Protection Switching (AFPS) feature for Digital Terminal Systems (DTS's). Incorporation of the DS1 AFPS feature into Digital Terminal
    Systems with DS1 terminations will provide the DS1 terminations with protection switching and facility restoration capability. Examples
    of Digital Terminal Systems are Digital Cross-Connect Systems (DCS's) and Automated Digital Terminal Systems (ADTS's).

    The AFPS feature is also applicable to Electronic Digital Signal Cross-Connects (EDSX's), which may act as a DTS in certain

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