TABLE II
INDEX OF TEST DESCRIPTION
Narrowband Voice and Data Facilities (to 4 kHz)
TD
1 NB
Frequency Response (Insertion Loss)
Codes S1, S2, S3, V1, V2, D1, and D2
TD
2 NB
Envelope-Delay Distortion
Codes S1, S2, S3, D1, and D2
TD
3 NB
Maximum Net Loss Variation
Codes S1, S2, S3, V1, V2, D1, and D2
TD
4 NB
Maximum Change in Audio Frequency
Codes S1, S2, S3, V1, V2, D1, and D2
TD
5 NB
Minimum Longitudinal Balance
Codes S1, S2, S3, V1, V2, D1, and D2
TD
6 NB
Maximum Allowable Channel Noise (Idle Channel Noise)
(Codes S1, S2, S3, V1, V2, D1, and D2
TD
7 NB
Maximum Single-Tone Interference
Codes S1, S2, V1, V2, D1, and D2
TD
8 NB
Impulse Noise
Codes S1, S2, S3, D1, and D2
TD
9 NB
Terminal Impedance
Codes S1, S2, S3, V1, V2, D1 and D2
TD
10 NB
Composite Data Transmission Level
Codes S1, S2, S3, V1, D1 and D2
TD
11 NB
Harmonic Distortion
Codes S1, S2, S3, V1, V2, D1, and D2
TD
12 NB
Phase Jitter
Codes S1, S2, S3, D1, and D2
Direct-Current Telegraph Facilities
TD
1T
Maximum Total Peak Telegraph Distortion
Maximum Mark or Space Bias Distortion
Codes N1, N2, and N3
88
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