Ricoh Aficio MP C3001 Service Manual page 1962

NCU Parameters
Address
Bit 0 sets the ring
detection method, Bit
1 sets the ring
detection method
when fixed.
Here is a summary of the voltages for the
detection of off-hook for DP detection.
6805E5
Bit 7
0
0
0
1
1
NOTES
1. If a setting is not required, store FF in the address.
2. Italy and Belgium only
RAM address 68055E: the lower four bits have the following meaning.
Bit 2 - 1: International dial tone cadence detection enabled (Belgium)
Bit 1 - Not used
Bit 0 - 1: PSTN dial tone cadence detection enabled (Italy)
If bit 0 or bit 2 is set to 1, the functions of the following RAM addresses are changed.
680508 (if bit 0 = 1) or 680538 (if bit 2 = 1): tolerance for on or off state
duration (%), and number of cycles required for detection, coded as in address 680533.
68050B (if bit 0 = 1) or 68053B (if bit 2 = 1): on time, hex code (unit = 20 ms)
68050C (if bit 0 = 1) or 68053C (if bit 2 = 1): off time, hex code (unit = 20 ms)
3. Pulse dial parameters (addresses 68054A to 68054F) are the values for 10 pps. If 20 pps
is used, the machine automatically compensates.
4. The first ring may not be detected until 1 to 2.5 wavelengths after the time specified by
this parameter.
D545
Function
0
Bit 0
1
0
Bit 1
1
Bit 6 Bit 5 Bit 4
0 0 0
0 0 1
0 1 0
0 0 0
1 1 1
158
Unit
Auto
Fixed
Use RDTP
Use RDTN
If any setting is changed,
select a setting that is
- higher than the default
setting.
Not used
2.75 V
5.5 V
22 V
41.25 V
Remarks
SM