Gestetner B130 Service Manual page 623

BIT SWITCHES
G3 Switch 06
No. Function
4–7 Modem types available for
reception
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 Switch 07
No. FUNCTION
0, 1 PSTN cable equalizer
(tx mode: Internal)
Bit 1 Bit 0
0 0
0 1
1 0
1 1
2, 3 PSTN cable equalizer
(rx mode: Internal)
Bit 3 Bit 2
0 0
0 1
1 0
1 1
4 PSTN cable equalizer
(V.27ter, V.29, V.33/V.17, V.8
rx mode: External)
0: Disabled 1: Enabled
5–7 Not used
B465
CÓPIA NÃO CONTROLADA
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
Not used disabled manually.
V.27ter, V.29,
V.17
Cross reference
V.27ter, V.29,
V.8 protocol on/off - G3 switch 03, bit 2
V.17,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.
•
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
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
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" in most cases.
Do not change these settings.
5-30
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Comments
COMMENTS
0-20, 0-23, etc.
SM