Intellectual Property Rights
Foreword
1 Scope
2 References
3 Definitions and abbreviations
3.1 Definitions
3.2 Abbreviations
4 Compliance principles
5 Characteristics of analogue interfaces
5.1 PBX input impedance of interfaces K2, L2, M2 and M4
5.2 Transmission loss
5.3 Group delay distortion
5.4 Noise
5.5 Crosstalk
5.6 Total distortion including quantizing distortion
5.7 Discrimination against out-of-band signals applied
to the K2, L2, M2 and M4 input interfaces
5.8 Echo and stability of interfaces K2, L2 and M2
6 Characteristics of digital interfaces
6.1 Coding law
6.2 Transmission loss
6.3 Bit sequence independence
7 Characteristics of system specific (non-analogue) MS
interfaces
7.1 Equipment Impairment Factor, Ie
7.2 Transmission loss
8 System specific telephones (wired or cordless)
8.1 General
8.2 Speech performance characteristics for 3,1 kHz
handset telephones (wired or cordless)
9 Characteristics for connections between two interfaces
9.1 General
9.2 Transmission loss between interfaces
9.3 Quantizing distortion units (qdu)
9.4 Equipment Impairment Factor, Ie
9.5 Mean one-way transmission time
9.6 Stability loss
Annex A (normative): Digital PBX transmission characteristic
measurements
A.1 General
A.2 Test point and access to the test point
A.3 Auxiliary test equipment
A.4 Specific measure
A.5 Electro-acoustic measurements
Annex B (informative): Description of the CSS
B.1 General
B.2 Test signal
B.3 Measurement
B.4 Calculation
Annex C (informative): Bibliography
History