Ricoh D023, Service Manual, Page: 1475 / 1522

NCU Parameters
D393 134 SM
Address Function Unit Remarks
680518
PABX dial tone frequency upper
limit (low byte)
detection is disabled.
680519
PABX dial tone frequency lower
limit (high byte)
68051A
PABX dial tone frequency lower
limit (low byte)
Hz (BCD)
If both addresses
contain FF(H), tone
detection is disabled.
68051B PABX dial tone detection time
68051C PABX dial tone reset time (LOW)
68051D PABX dial tone reset time (HIGH)
68051E
PABX dial tone continuous tone
time
68051F
PABX dial tone permissible drop
time
If 68051B contains FF,
the machine pauses for
the pause time (680520 /
680521).
680520 PABX wait interval (LOW)
680521 PABX wait interval (HIGH)
20 ms
-
680522 PABX ringback tone detection time 20 ms
680523
PABX ringback tone off detection
time
20 ms
If both addresses
contain FF(H), tone
detection is disabled.
680524
PABX detection time for silent
period after ringback tone
detected (LOW)
20 ms
680525
PABX detection time for silent
period after ringback tone
detected (HIGH)
20 ms
If both addresses
contain FF(H), tone
detection is disabled.
680526
PABX busy tone frequency upper
limit (high byte)
Hz (BCD)
If both addresses
contain FF(H), tone