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BS 6450-7:1990

Withdrawn Date published:

Warning: Withdrawn Standard. This document has been withdrawn without replacement. You may wish to search for a more up to date equivalent.

Private branch exchanges for connection to public switched telephone networks run by certain public telecommunication operators, Specification for the procedure for in-service observation of PBXs undergoing type approval

Specifies the assessment of PBXs against the integrity of service requirements in BS 6450-1:1983 and the observation of PBXs against appropriate Parts of BS 6450 under operational conditions.

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BS 6450-7:1990

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