Bit Switches – 4
SM 85 D0C5/D0C6/D0C4/D0AP FAX UNIT
(D0C5/D0C6
/D0C4/D0AP)
Bit 7 Bit
6
Bit
5
Bit
4
Types
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
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)
Use a higher setting if there is a 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 occur.
Communication error
Modem rate fallback occurs frequently.
• This setting is not effective in V.34 communications.
Bit
1
Bit
0
Setting
0 0 None
0 1 Low
1 0 Medium
1 1 High
2-3 PSTN cable equalizer
(rx mode: Internal)
Use a higher setting if there is a 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 occur.
Communication error with error codes such as 0-20, 0-23, etc.
Modem rate fallback occurs frequently.
• This setting is not effective in V.34 communications.
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
Keep this bit at "1".
5 Not used Do not change the settings.
6 Parameter selection
for dial tone
detection
0: This uses the fixed table in the ROM for dial tone detection.
1: This uses the specific parameter adjusted with SRAM
(69ECBEH - 69ECDEH). Select this if the dial tone cannot be
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