scope:

This International Standard contains requirements necessary forthesynchronization of PISNs. Timing within adigital private network needs to be controlled carefullyto ensure thatthe rate of occurrence of slips between PINXs within the PEN ,and the publicswitched networks is sufficiently low not to affect unduly the performance ofvoice transmissions, orthe accuracy or throughput (if errored data require re-transmission) of non-voice services.

Requirements arealso based upon the interconnection of digital private telecommunication networksviadigital facilities in the public (switched or not) telecommunication networks.

This International Standard is one of a series of technical standards on telecommunications networks. This International Standard with its companion standards fills a recognized need in the telecommunications industry brought about by the increasing use of digital equipment and facilities in private networks. It is useful to anyone engaged in the manufacture of digitalcustomerpremisesequipment( CPE)forprivatenetworkapplications,andtothosepurchasingo, peratingorapplying digital CPE to digital facilities for Private Integrated Services Networks (PISN).

This International Standard establishes technical criteria necessary in the design of a synchronization plan for a PISN. Compliance with these requirements would be expected to result in a quality PISN synchronization design