Gestetner G060 Service Manual page 767

G3 Switch 06
No FUNCTION
4
Modem types available for
to reception
7 Bit 7 6 5 4 Setting
0 0 0 1 V.27ter
0 0 1 0 V.27ter, V.29
0 0 1 1 V.27ter, V.29
V.33
0 1 0 0 V.27ter, V.29,
V.17/V.33
0 1 0 1 V.27ter, V.29,
V.17/V33,
V.34
Other settings - Not used
G3 Switch 07
No FUNCTION
0 PSTN cable equalizer
to (tx mode: Internal)
1 Bit 1 Bit 0 Setting
0 0 None
0 1 Low
1 0 Medium
1 1 High
2 PSTN cable equalizer
to
(rx mode: Internal)
3 Bit 3 Bit 2 Setting
0 0 None
0 1 Low
1 0 Medium
1 1 High
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-
Not used
7
SM
COMMENTS
The setting of these bits is used to inform the
transmitting terminal of the available modem type for
the machine in receive mode.
If V.34 is not selected, V.8 protocol must be
disabled manually.
Cross reference
V.8 protocol on/off - G3 switch 03, bit2
COMMENTS
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.
Use the dedicated transmission parameters for
specific receivers.
Also, try using the cable equalizer if one or more of
the following symptoms occurs.
•
Communication error
•
Modem rate fallback occurs frequently.
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
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.
•
rate
Modem fallback
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.
3-43
BIT SWITCHES
SP No. 1-105-007
SP No. 1-105-008
occurs frequently.
G307