Ricoh D127 Service Manual page 507

ISDN cable equalizer
(rx mode: Internal)
Bit 3: 0, Bit 2: 0 = None
2-3
Bit 3: 0, Bit 2: 1 = Low
Bit 3: 1, Bit 2: 0 = Medium
Bit 3: 1, Bit 2: 1 = High
ISDN cable equalizer
(V.8/V.17 rx mode: External)
4
0: Disabled
1: Enabled
5-7 Not used
G3 Switch 0A [SP No. 1-105-011]
No FUNCTION
Maximum allowable carrier
drop during image data
reception (ms)
0-1 Bit 1: 0, Bit 0: 0 = 200
Bit 1: 0, Bit 0: 1 = 400
Bit 1: 1, Bit 0: 0 = 800
Bit 1: 1, Bit 0: 1 = Reserved
Select cancellation of
high-speed RX if carrier signal
2 lost while receiving
0: Off
1: On
SM Appendix
Use a higher setting if there is signal loss at
higher frequencies because of the length of
wire between the modem and the
telephone exchange.
Also, try using the cable equalizer if one or
more of the following symptoms occurs.
Communication error with error codes such
as
0-20, 0-23, etc.
Modem rate fallback occurs frequently.

This setting is not effective in V.34
communications.
Keep this bit at "1".
Do not change the settings.
COMMENTS
These bits set the acceptable modem carrier
drop time.
Try using a longer setting if error code 0-22 is
frequent.
This switch setting determines if high-speed
receiving ends if the carrier signal is lost when
receiving during non-ECM mode
5-55
Bit Switches
D127/D128