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BS 6450-3.1:1993
M00000312
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BS 6450-3.1:1993 Private branch exchanges for connection to public switched telephone networks run by certain public telecommunication operators. Direct dialling in on private branch exchanges. Specification for direct dialling in on private branch exchanges with terminating stations treated as an entirety
standard by BSI Group, 01/15/1993
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Cross References:
BS 2045
BS 6305
BS 6317
BS 6450:Part 1
BS 6450:Part 2
BS 6450:Section 5.1
BS 6450:Section 6.1
BS 6450:Part 7
BS 6484
CCITT Recommendation O.41
Telecommunications Act 1984
Health and Safety at Work etc. Act 1974