Gestetner B003 Service Manual page 709

BIT SWITCHES
G3-2 Switch 06
No FUNCTION
4 Modem types available for
to reception
7 Bit 7 6 5 4
0 0 0 1
0 0 1 0
0 0 1 1
0 1 0 0
0 1 0 1
Other settings - Not used
G3-2 Switch 07
No FUNCTION
0 PSTN cable equalizer
to (tx mode: Internal)
1 Bit 1 Bit 0
0 0
0 1
1 0
1 1
2 PSTN cable equalizer
to (rx mode: Internal)
3 Bit 3 Bit 2
0 0
0 1
1 0
1 1
4 PSTN cable equalizer
(V.8/V.17 rx mode: External)
0: Disabled
1: Enabled
5 PSTN cable equalizer
(V.34 rx mode; External)
6-7 Not used
B003/B004/B006/B007
The setting of these bits is used to inform the
transmitting terminal of the available modem type for
Setting the machine in receive mode.
V.27ter
V.27ter, V.29 If V.34 is not selected, V.8 protocol must be
V.27ter, V.29 disabled manually.
V.33
V.27ter, V.29,
Cross reference
V.17/V.33
V.8 protocol on/off - SG3 switch 03, bit2
V.27ter, V.29,
V.17/V33,
V.34
Use a higher setting if there is signal loss at higher
frequencies because of the length of wire between
Setting the modem and the telephone exchange.
None Use the dedicated transmission parameters for
Low specific receivers.
Medium
High Also, try using the cable equalizer if one or more of
the following symptoms occurs.
•
•
Note: This setting is not effective in V.34
communications.
Use a higher setting if there is signal loss at higher
frequencies because of the length of wire between
Setting the modem and the telephone exchange.
None
Low Also, try using the cable equalizer if one or more of
Medium the following symptoms occurs.
•
High
•
Note: This setting is not effective in V.34
communications.
Keep this bit at "1".
Keep this bit at "1".
Do not change the settings.
3-52
COMMENTS
COMMENTS
Communication error
Modem rate fallback occurs frequently.
Communication error with error codes such as
0-20, 0-23, etc.
Modem rate fallback occurs frequently.
SP No. 1-106-007
SP No. 1-106-008
SM