BS 6450-7:1984
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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Private branch exchanges for connection to public switched telephone networks run by certain public telecommunication operators Specification for the procedure of in-service observation for PBXs undergoing type approval
Hardcopy
28-10-1990
English
30-09-1988
Specifies the assessment of PBXs against the integrity of service requirements in BS 6450:Part 1:1983 and the observation of PBXs against appropriate Parts of BS 6450 under operational conditions.
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