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BS 6450-5-5.1:1984:1988 Edition

$167.15

Private branch exchanges for connection to public switched telephone networks run by certain public telecommunication operators.Facilities on private branch exchanges – Specification for facilities on private branch exchanges with terminating stations treated as an entirety

Published By Publication Date Number of Pages
BSI 1988 40
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Specifies requirements for facilities on PBXs within the scope of BS 6450:Part 2:1983.

BS 6450-5-5.1:1984
$167.15