Service manual

Bit Switches
M381 90 SM
1 1 1 0 33.6k
Other settings - Not used
4-7
Modem types available for reception
 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
Bit 7 Bit 6 Bit 5 Bit 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, V.17
0 1 0 1
V.27ter,
V.29, V.17,
V.34
Other settings - Not used
G3 Switch 07 [SP No. 1-105-008]
No FUNCTION COMMENTS
0-1
PSTN cable equalizer
(tx mode: Internal)
Bit 1: 0, Bit 0: 0 = None
Bit 1: 0, Bit 0: 1 = Low
Bit 1: 1, Bit 0: 0 = Medium
Bit 1: 1, Bit 0: 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.
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.
 This setting is not effective in V.34
communications.