A-5
Cisco uBR924 Router Hardware Installation Guide
OL-0338-01 (3/2000)
Appendix A Technical Specifications
Voice Specifications
Voice Specifications
Table A-3 lists the specifications for the voice ports on the Cisco uBR924 cable access router.
Table A-3
Cisco uBR924 Cable Access Router Voice Specifications
Metric
Value
Loss (between DCS and BTI gateway)
Nominal: 4 dB ±.5 dB (off hook)
Nominal: 9 dB ±.5 dB (on hook)
Attenuation distortion:
DCS <> BTI (200Hz-3.5kHz)
BTI<> DCS (304 Hz-3004Hz)
DCS -> BTI (204 Hz-3004 Hz)
Nominal:
+1 dB/-3 dB
±0.5 dB
±0.5 dB0
Idle channel noise
<= 18 dBmC (noise shall not exceed)
Signal to C-notched noise
>= 35 dB
Inter-modulation distortion:
R2
R3
>= 52 dB
>= 52 dB
Single frequency interference:
0 to 12 kHz
0 to 4 kHz
<= -28 dBmO
<= -40 dBmO
Frequency shift (offset)
<= ±0.2 Hz (max)
<= ±0.1 Hz (99.5%)
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)
Max Dev. Ave. Dev.
<= ±.5 dB
<= ±.5 dB <= ±.25 dB
<= ±1.0dB <= ±.5 dB
<= ± 3.0 dB <= ±1.5 dB
Crosstalk
<= -65 dBmO
Amplitude jitter
20-300 Hz
4-300 Hz
<= 2.5% Peak
<= 2.9% Peak
Phase jitter
20 to 300 Hz
4 to 300 Hz
<= 1.5 P-P
<= 1.8 P-P
Envelope delay distortion:
1704 Hz to 604 Hz
1704 Hz to 2804 Hz
1704 Hz to 204 Hz
1704 Hz to 3404 Hz
<= 350 usec
<= 195 usec
<= 580 usec
<= 400 usec
