I.S. I-ETS 300 005:1992
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
BUSINESS TELECOMMUNICATIONS (BT) - TRANSMISSION CHARACTERISTICS AT 4-WIRE ANALOGUE INTERFACES OF A DIGITAL PRIVATE AUTOMATIC BRANCH EXCHANGE (PABX)
Hardcopy , PDF
07-23-2013
English
01-01-1992
1 Foreword
2 Scope
3 Related standards
4 Definitions
5 Four-wire interface specifications
5.1 Characteristics of interfaces
5.2 Characteristics of half connections
Annex A: Relative levels for M4 and K4 interfaces in dBr
Annex B: Impedance unbalance about earth in different
European Administrations
Annex C: Single frequency noise (dBm0)
Annex D: Discrimination against out-of-band signals applied
to the input interface: Signals below 300 Hz
Annex E: Nominal values for input impedance and return loss
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