Gestetner A265 Service Manual page 668

BIT SWITCHES
SG3 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
0 1 0 0 V.27ter, V.29,
0 1 0 1 V.27ter, V.29,
Other settings - Not used
SG3 Switch 07
No FUNCTION
0
PSTN cable equalizer
to (tx mode: Internal)
Bit 1 Bit 0
1
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
A265/A267
CÓPIA NÃO CONTROLADA
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.
V.33
Cross reference
V.17/V.33
V.8 protocol on/off - SG3 switch 03, bit2
V.17/V33,
V.34
Use a higher setting if there is signal loss at
higher frequencies because of the length of wire
Setting
between the modem and the telephone
None exchange.
Use the dedicated transmission parameters for
Low
Medium specific receivers.
High
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
Setting between the modem and the telephone
None exchange.
Low
Medium Also, try using the cable equalizer if one or more
High of the following symptoms occurs.
•
Communication error with error codes such as
•
Modem rate fallback occurs frequently.
Note: This setting is not effective in V.34
communications.
Keep this bit at "1".
4-64
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COMMENTS
COMMENTS
0-20, 0-23, etc.
SM