G4 Parameter Switches - Gestetner A193 Service Manual

BIT SWITCHES

2.2 G4 PARAMETER SWITCHES

Parameter Switch 00
FUNCTION
0 Network type
Bit 2 1 0 Type
1 x 0 0 Circuit
switched ISDN
2
Other settings: Not
used
3 Not used
to
7
Parameter Switch 01
FUNCTION
0 Voice coding
0: µ law
1: A law
1 Action when [SETUP]
signal without HLC is
received
0: Respond to the call
1: Not respond to the
call
2 Not used
3
4 Signal attenuation level for G3 fax signals received from ISDN line.
5 If an analog signal comes over an digital line, the signal level after decoding by the TE
6 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 MFCE by -6dB.
Bit 6 5 4
0 0 0 -4.5dB
0 0 1 -2.5dB
0 1 0 -0.5dB
0 1 1 +1.5dB
1 0 0 +3.5dB
1 0 1 +5.5dB
1 1 0 +7.5dB
1 1 1 +9.5dB
7 Not used
SM
Do not change the default setting.
Do not change the default settings.
0: This setting is used in Japan, Taiwan, and the USA.
1: This setting is used in Europe and Asia.
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.
Do not change the default settings.
Codec Modem (Actual attenuation level)
-10.5dB
-8.5dB
-6.5dB
-4.5dB (default setting)
-2.5dB
-0.5dB
+1.5dB
+3.5dB
Do not change the default settings.
COMMENTS
COMMENTS
2-10 (A644) ISDN