I.S. I-ETS 300 004:1992
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.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 2-WIRE ANALOGUE INTERFACES OF A DIGITAL PRIVATE AUTOMATIC BRANCH EXCHANGE (PABX)
Hardcopy , PDF
23-07-2013
English
01-01-1992
1 Foreword
2 Scope
3 Related standards
4 Definitions
4.1 Definitions of interfaces
4.2 Definition of parameters
5 2-wire interface specifications
5.1 Characteristics of interfaces
5.2 Characteristics of half connections
Annex A: Test networks for PABX input impedances at
interfaces K2 and M2
Annex B: Relative levels for K2 and M22 interfaces
in dBr
Annex C: Test networks for PABX input impedances at
interface L2
Annex D: Relative levels at interface L2 and M21 in dBr
Annex E: Test networks for TBRL in different European
Administrations
Annex F: Compensation of losses on long or short 2-wire
lines
Annex G: Impedance unbalance about earth in different
European Administrations
Annex H: Discrimination against out-of-band signals applied
to the input interface: Signals below 300 Hz
Annex J: Single frequency noise (dBmO)
Annex K: Return loss
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