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. Cross References:BS 4778BS 6450:Part 1:Section 6.1Telecommunications Act 1984
Original price was: $160.02.$80.00Current price is: $80.00.
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
BSI Group , 10/28/1990
Pages: 14
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