Ricoh A250 Service Manual page 516

NCU PARAMETERS
Address
680404 PSTN dial tone frequency upper
limit (high byte)
680405 PSTN dial tone frequency upper
limit (low byte)
680406 PSTN dial tone frequency lower
limit (high byte)
680407 PSTN dial tone frequency lower
limit (low byte)
680408 PSTN dial tone detection time
680409 PSTN dial tone reset time (LOW)
68040A PSTN dial tone reset time (HIGH)
68040B PSTN dial tone continuous tone
time
68040C PSTN dial tone permissible drop
time
68040D PSTN wait interval (LOW)
68040E PSTN wait interval (HIGH)
68040F PSTN ring-back tone detection
time
680410 PSTN ring-back tone off detection
time
680411 PSTN detection time for silent
period after ring-back tone
detected (LOW)
PSTN detection time for silent
680412
period after ring-back tone
detected (HIGH)
680413 PSTN busy tone frequency upper
limit (high byte)
PSTN busy tone frequency upper
680414
limit (low byte)
680415 PSTN busy tone frequency lower
limit (high byte)
680416 PSTN busy tone frequency lower
limit (low byte)
680417 PABX dial tone frequency upper
limit (high byte)
680418 PABX dial tone frequency upper
limit (low byte)
PABX dial tone frequency lower
680419
limit (high byte)
68041A PABX dial tone frequency lower
limit (low byte)
A250
Function
4-54
Unit
Hz (BCD) If both addresses
contain FF(H), tone
detection is disabled.
Hz (BCD) If both addresses
contain FF(H), tone
detection is disabled.
20 ms If 680408 contains
FF(H), the machine
pauses for the pause
time (address 68040D /
68040E).
Italy: See Note 2.
20 ms Detection is disabled if
this contains FF.
20 ms
20 ms
20 ms
Hz (BCD) If both addresses
contain FF(H), tone
detection is disabled.
Hz (BCD) If both addresses
contain FF(H), tone
detection is disabled.
Hz (BCD) If both addresses
contain FF(H), tone
detection is disabled.
If both addresses
Hz (BCD)
contain FF(H), tone
detection is disabled.
Remarks
SM