NCU PARAMETERS
SM 93 B779
Fax Option
B779
Voltage setting to detect off-hook for
voltage/DP detection for an
externally connected line.
0: Auto
1: Fixed V
Here is a summary of the fixed voltage settings (1:
Fixed) for an externally connected line.
Bit 7 Bit 6 Bit 5 Bit 4
0 0 0 0 Not used
0 0 0 1 2.75 V
0 0 1 0 5.5 V
1 0 0 0 22 V
6805E3
1 1 1 1 41.25 V
Do not change these
settings
6805E4
bit 2
Threshold for ring level
Change bit 2 to 1
This will increase the threshold for ringing level
detection.
6805E4
bit 3
On-Hook impedance level
Change bit 3 0 to 1
This will decrease the on-hook impedance
level
6805E5
bits
0 and 1
Selection of positive and
negative sides of the signal
waveform for incoming call
detection
Bit 0= 0: Automatically judged
Bit 0= 1: Manually select to use either positive
or negative side
Bit 1= 0: Use positive side of waveform
Bit 1= 1: Use negative side of waveform
Rev. 10/2006
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