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Appendix A
Technical Specifications
Voice Specifications
Table A-3 lists the specifications for the voice ports on the Cisco CVA122/CVA122E Cable Voice
Adapter.
Table A-3
Metric
Loss (between DCS and BTI gateway)
Attenuation distortion:
DCS <> BTI (200Hz-3.5kHz)
BTI<> DCS (304 Hz-3004Hz)
DCS -> BTI (204 Hz-3004 Hz)
Idle channel noise
Signal to C-notched noise
Inter-modulation distortion:
R2
R3
Single frequency interference:
0 to 12 kHz
0 to 4 kHz
Frequency shift (offset)
Amplitude tracking (input Level, dBmO):
-37 to 0 (on-hook)
-37 to +3 (off hook)
-50 to -37 (off-hook)
-55 to -50 (off-hook)
Crosstalk
Codec Support (dependant on software release)
Amplitude jitter
20-300 Hz
4-300 Hz
Phase jitter
20 to 300 Hz
4 to 300 Hz
Envelope delay distortion:
1704 Hz to 604 Hz
1704 Hz to 2804 Hz
1704 Hz to 204 Hz
1704 Hz to 3404 Hz
OL-0799-02 (05/2001)
Cisco CVA122/CVA122E Cable Voice Adapter Voice Specifications
Value
Nominal:
4 dB ±.5 dB (off hook)
Nominal:
9 dB ±.5 dB (on hook)
Nominal:
+1 dB/-3 dB
±0.5 dB
±0.5 dB0
<= 18 dBmC (noise shall not exceed)
>= 35 dB
>= 52 dB
>= 52 dB
<= -28 dBmO
<= -40 dBmO
<= ±0.2 Hz (max)
<= ±0.1 Hz (99.5%)
Max Dev.
Ave. Dev.
<= ±.5 dB
<= ±.5 dB
<= ±.25 dB
<= ±1.0dB
<= ±.5 dB
<= ± 3.0 dB
<= ±1.5 dB
<= -65 dBmO
G.711, G.723.1, G.726, G.728, G.729, G.729a
<= 2.5% Peak
<= 2.9% Peak
<= 1.5 P-P
<= 1.8 P-P
<= 350 usec
<= 195 usec
<= 580 usec
<= 400 usec
Cisco CVA122/CVA122E Hardware Installation Guide
Voice Specifications
A-5
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