Ricoh MP C305SPF, Field Service Manual, Page: 120 / 146

Address Function Unit Remarks
680501 Line current detection time
20 ms
Line current detection is
disabled.
Line current is not detected if
680501 contains FF.
680502 Line current wait time
680503 Line current drop detect time
680504
PSTN dial tone frequency upper limit
(high byte)
Hz (BCD)
If both addresses contain
FF(H), tone detection is
disabled.
680505
PSTN dial tone frequency upper limit
(low byte)
680506
PSTN dial tone frequency lower limit
(high byte)
Hz (BCD)
If both addresses contain
FF(H), tone detection is
disabled.
680507
PSTN dial tone frequency lower limit
(low byte)
680508 PSTN dial tone detection time
20 ms
If 680508 contains FF(H),
the machine pauses for the
pause time (address
68050D / 68050E).
Italy: See Note 2.
680509 PSTN dial tone reset time (LOW)
68050A PSTN dial tone reset time (HIGH)
68050B PSTN dial tone continuous tone time
68050C PSTN dial tone permissible drop time
68050D PSTN wait interval (LOW)
-
68050E PSTN wait interval (HIGH)
68050F PSTN ring-back tone detection time 20 ms
Detection is disabled if this
contains FF.
680510 PSTN ring-back tone off detection time 20 ms -
680511
PSTN detection time for silent period
after ring-back tone detected (LOW)
20 ms -
680512
PSTN detection time for silent period
after ring-back tone detected (HIGH)
20 ms -
4. Service Tables
118