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Installing and putting a SINAUT modem into operation
6.7 ISDN dial-up modem MD4
Settings with the DIL switches accessible from below
A 4-pin DIL switch on the bottom of the modem housing is accessible from below. This DIL
switch is used to activate either the RS-232 or RS-485 interface. For RS-485 operation, you
can also activate the terminating resistor. The following figure shows the possible settings in
general.
Figure 6-52
Pinout of the RJ-12 Western jack
The X3 connector of the MD4 modem is designed as a 6-pin RJ-12 Western jack. The pinout
is shown in the following table.
Table 6-47
Pinout of the X3 RJ-12 jack for the MD4 modem
Illustration
6
5
4
3
2
1
Standard connecting cable for the RJ-12 port
The connecting cable 6NH7700-4AR60 ships with every MD4 modem. This allows the
modem to be connected to an ISDN S
The connecting cable can also be ordered as a spare under the number shown.
Table 6-48
Standard connecting cable for the integrated MD4 modem
Order no.
6NH7700-4AR60
308
Possible settings on the 4-pin DIL switch accessible from below
Pin no.
Signal name
1
-
2
TX-
3
RX-
4
RX+
5
TX+
6
-
Description
Connecting cable with RJ-12 and RJ-45 plug to
connect an MD4 modem (RJ-12) with an ISDN-S
(RJ-45). The cable is also suitable for an MD4
integrated in a TIM.
Cable length 6 m
Signal direction
outlet.
0
Illustration
jack
0
SINAUT ST7 Station control system - System Manual
System Manual, 05/2007, C79000-G8976-C178-06
Remark
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