Paradyne COMSPHERE 3911 Installation And Operation Manual page 136

COMSPHERE 3900 Series Modems
To correct the invalid VF threshold, press the
Edit/Save/Reset screen.
Select Reset to restore the original default values into memory.
Repeat the Edit and Save procedure until the VF threshold(s) is valid and the Save completes
successfully (Save Completed).
To exit this function and remain in the Control branch, press the
the Top-Level menu, press the
VF Thresholds
Receive Signal Level High
Receive Signal Level Low
Signal to Noise Ratio
Non-Linear Distortion
Retrains
Signal Quality
Near Echo
Far Echo
7-16
VF Thresholds
Edit Save Reset
F1 F2 F3
key.
Table 7-1
Valid Ranges for VF Thresholds
Valid Ranges
0 dBm to –15 dBm
–16 dBm to –50 dBm
5 dB to 40 dB
15 dB to 50 dB
1 to 256 trains
Excellent (lowest)
Good
Fair
Poor
No Signal (highest)
0 —38 dBm
0 —38 dBm
September 1998
key to return to the VF Threshold
key. To exit and return to
Default Values
Above –9 dBm
Below –23 dBm
Below 23 dB
Below 30 dB
15 trains per 15 minutes
Good
Above –20 dBm
Above –20 dBm
3910-A2-GN32-40