Ricoh D072 Service Manual page 624

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.
5. The calculated level must be between 0 and 10.
The attenuation levels calculated from RAM data are:
High frequency tone:
– 0.5 x N
/
680552 680554
– 0.5 x N dBm
680555
Low frequency tone:
– 0.5 x (N /
680552 680554
– 0.5 x (N + N
680555
N , for example, means the value stored in address 680552(H)
680552
6. 68054A: Europe - Between Ds opening and Di opening, France - Between Ds closing
and Di opening
68054D: Europe - Between Ds closing and Di closing, France - Between Ds opening
and Di closing
7. Tone signals which frequency is lower than 1500Hz (e.g., 800Hz tone for AI short
protocol) refer to the setting at 6805B5h. Tones which frequency is higher than 1500Hz
refer to the setting at 6805B6h.
8. 68054A, 68054D, 68054E: The actual inter-digit pause (pulse dial mode) is the sum of
the period specified by the RAM addresses 68054A, 68054D, and 68054E.
SM Appendix
–3.5 dBm
+ N ) –3.5 dBm
680553
) dBm
680553
7-85
NCU Parameters
D067/D068/D069/D072