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IEEE Standard Methodologies for Specifying Voicegrade Channel Transmission Parameters and Evaluating Connection Transmission Performance for Speech Telephony (Withdrawn), 1989
- 1 Introduction
- 2 Purpose Scope and Application [Go to Page]
- Definitions
- 4 Summary of Standards [Go to Page]
- 5.1 General [Go to Page]
- 6 Connection Performance for Speech Transmission [Go to Page]
- 7 References [Go to Page]
- Illustration of Some Definitions
- Summary of Procedure
- Connection Loss Example
- Connection Idle-Circuit Noise Example
- Connection Quantization Noise Example [Go to Page]
- Method of Determining Dominant Channel Talker Echo Paths
- Determination of Dominant Connection Talker Echo Paths
- Illustration of Talker Echo in a Complete Connection
- Loudness Loss-Equivalent Noise Performance Classes
- Talker Echo Performance Classes for Delays > 100 ms < 1200 ms
- Application Examples
- Connection Parameters [Go to Page]
- Criteria and Methodology Used in Defining the Performance Classes
- Off-Premises Station (OPS) Channel Specification
- Example of a Complete Connection
- Loss-Noise Performance of Example Complete Connection
- Example of Alternative Connection Arrangements
- Application of Echo Control Devices
- Illustrative Example of TEPL and Equal Level TEPL
- General Case for TOLR' and ROLR'
- TOLR and ROLR According to EIA 470-A (1987) [Cl] and IEEE Std 661-1979 [C21 [Go to Page]
- Table A1 Alternative Arrangements
- Table C1 Estimated Values TOLR' and ROLR'
- Table C2 Loudness Ratings for 500-Type Set with 26-Gauge Subscriber Lines
- Table C3 1004 Hz 900 R Insertion Loss of 26-Gauge Cable
- Table C4 Loudness Rating Distribution for 500-Type Set Model on 1973 Customer Loops
- Table C5 Loudness Ratings for 500-Type Set Model on Short Loops [Go to Page]
- Classification
- Table D2 Speech Performance Classes of Voicegrade Connections [Go to Page]
