Ricoh A230, Service Manual, Page: 874 / 1134

BIT SWITCHES
2-10
A230/A231/A232 SM
2.2.2 G4 PARAMETER SWITCHES
Parameter Switch 00
No. FUNCTION COMMENTS
0
1
2
Network type
Bit 2
1 0 Type
x 0 0 Circuit
switched
ISDN
Other settings: Not used
Do not change the default setting.
3
to
7
Not used Do not change the default settings.
Parameter Switch 01
No. FUNCTION COMMENTS
0 Voice coding
0:
µ
law
1: A law
0: This setting is used in Japan, Taiwan, and the
USA.
1: This setting is used in Europe and Asia.
1 Action when [SETUP] signal
without HLC is received
0: Respond to the call
1: Not respond to the call If there are several TEs on the same bus and the
machine responds to calls for another TE, the call
may be without HLC information.
Identify the type of calling terminal and change
this bit to 1 if the caller is not a fax machine.
2 Not used Do not change the default settings.
3
4
5
6
Signal attenuation level for G3 fax signals received from ISDN line.
If an analog signal comes over an digital line, the signal level after decoding by
the TE is theorically the same as the level at the entrance to the digital line.
However, this sometimes causes the received signal level to be too high at the
received end. In this case, adjust the decoded signal's attenuation level using
these switches.
The values in the “Codec” column below show the attenuation level at the G4
interface board. The values in the “Modem” column show the actual attenuation
level at the modem, because the signal is attenuated again on the FCU by -6dB.
Bit 6 5 4 Codec Modem (Actual attenuation level)
0 0 0 -4.5dB -10.5dB
0 0 1 -2.5dB -8.5dB
0 1 0 -0.5dB -6.5dB
0 1 1 +1.5dB -4.5dB (default setting)
1 0 0 +3.5dB -2.5dB
1 0 1 +5.5dB -0.5dB
1 1 0 +7.5dB +1.5dB
1 1 1 +9.5dB +3.5dB
7 Not used Do not change the default settings.