Ricoh B264 - Page 823

BIT SWITCHES
SM 71 B779
Fax Option
B779
G3 Switch 07 SP No. 1-105-008
No FUNCTION COMMENTS
2
to
3
PSTN cable equalizer
(rx mode: Internal)
Bit 3 Bit 2 Setting
0 0 None
0 1 Low
1 0 Medium
1 1 High
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.
Note: This setting is not effective in V.34
communications.
4 PSTN cable equalizer
(V.8/V.17 rx mode: External)
0: Disabled
1: Enabled
Keep this bit at “1”.
5-7 Not used Do not change the settings.
G3 Switch 08 - Not used (do not change the settings)
G3 Switch 09 - Not used (do not change the settings)
G3 Switch 0A SP No. 1-105-011
No FUNCTION COMMENTS
1
Maximum allowable carrier
drop during image data
reception
Bit 1 Bit 0 Value (ms)
0 0 200
0 1 400
1 0 800
1 1 Not used
These bits set the acceptable modem carrier drop
time.
Try using a longer setting if error code 0-22 is
frequent.
2
Select cancellation of high-
speed RX if carrier signal lost
while receiving
0: Off
1: On
This switch setting determines if high-speed
receiving ends if the carrier signal is lost when
receiving during non-ECM mode
3 Not used Do not change the settings
4
Maximum allowable frame
interval during image data
reception.
0: 5 s 1: 13 s
This bit set the maximum interval between EOL
(end-of-line) signals and the maximum interval
between ECM frames from the other end.
Try using a longer setting if error code 0-21 is
frequent.
5 Not used Do not change the settings.