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Data Specifications
Table A-2
Cisco CVA122/CVA122E Cable Voice Adapter Data Specifications (continued)
Description
One Channel
Security
Cisco CVA122/CVA122E Hardware Installation Guide
A-4
Downstream Values
Receive level of digital signal
-15 to +15 dBmV
Most field measurements are of
Note
nearby or adjacent analog signal
which is normally +6 to +10 dB
(system specific) above the digital
signal level
DES decryption: DOCSIS Baseline Privacy (BPI), 40-bit and 56-bit DES encryption, as controlled
by the headend and configuration files.
Cisco IOS images must contain encryption software at both the CMTS and the
Note
Cisco CVA120 Series Cable Voice Adapter. Both units must be enabled and properly
configured to support encryption.
Appendix A
Upstream Values
QPSK— +8 to +58 dBmV
16 QAM— +8 to +55 dBmV
Technical Specifications
OL-0799-02 (05/2001)
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Troubleshooting
