A-6
Cisco CVA122/CVA122E Hardware Installation Guide
OL-0799-02 (05/2001)
Appendix A Technical Specifications
Voice Specifications
Hybrid balance:
Echo Return Loss (ERL)
SRL
> 26 dB (standard test line)
> 14 dB (station off hook)
> 21 dB (standard test line)
> 11 dB (station off hook)
Clipping:
Speech segments <5 ms
Speech segments > 5ms
< 0.5%
0.0%
Impulse noise:
(>= 6 dB below receive signal)
0 in 93% of all 15 min intervals
<= 1 count in all 30 min intervals
Phase hits (>= 10 deg)
0 in 99.75% of all 15 min intervals
<= 1 count in all 30 min intervals
Gain hits (>= ± 3dB)
0 in 99.9% of all 15 min intervals
<= 1 count in all 30 min intervals
Dropouts (>= 12)
0 in 99.9% of all 15 min intervals
<= 1 count in all 60 min intervals
Ringing Characteristics
Ringing Voltage
46.5 VRMS (balanced ringing only)
Ring Frequency (adjustable)
20 Hz (default), 25 Hz, 50 Hz
Ring Load (per line)
5 REN (Ringer Equivalence Number)
4REN
3REN
2REN
1REN
Maximum Distance
2225ft
3125ft
4650ft
7900ft
17500ft
On Hook/Off Hook Characteristics
On-Hook Voltage (Tip/Ring)
-30V
Off-Hook Current
25mA
Port Terminating Impedance
600 ohms resistive (default)
900 ohms resistive, complex
Table A-3
Cisco CVA122/CVA122E Cable Voice Adapter Voice Specifications (continued)
Metric
Value
