Ricoh S-C4.5 Field Service Manual page 389

DIS detection number
(Echo countermeasure)
0
0: 1
1: 2
1 Not Used
V.8 protocol
2 0: Disabled
1: Enabled
ECM frame size
3 0: 256 bytes
1: 64 bytes
CTC transmission conditions
0: After one PPR signal received
4
1: After four PPR signals received
(ITU-T standard)
Modem rate used for the next page
after receiving a negative code
5
(RTN or PIN)
0: No change 1: Fallback
6 Not Used
0: The machine will hang up if it receives the same DIS frame
twice.
1: Before sending DCS, the machine will wait for the second
DIS which is caused by echo on the line.
Do not change the settings.
0: V.8/V.34 communications will not be possible.
Note:
Do not set to 0 unless the line condition is always bad
enough to slow down the data rate to 14.4 kbps or lower.
Keep this bit at "0" in most cases.
0: When using ECM in non-standard (NSF/NSS) mode,
the machine sends a CTC to drop back the modem rate after
receiving a PPR, if the following condition is met in
communications at 14.4, 12.0, 9.6, and 7.2 kbps.
NTransmit- Number of transmitted frames
NResend- Number of frames to be retransmitted
1: When using ECM, the machine sends a CTC to drop
back the modem rate after receiving four PPRs.
PPR, CTC: These are ECM protocol signals.
This bit is not effective in V.34 communications.
1: The machine's tx modem rate will fall back before
sending the next page if a negative code is received. This
bit is ignored if ECM is being used.
Do not change the settings
Bit Switches
5
193