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Installation and commissioning of the modems and routers
5.8 ISDN dial-up modem MD4
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 5- 47
Pinout of the X3 RJ-12 jack for the MD4 modem
Illustration
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 cable is no longer available as separate spare part.
Table 5- 48
Standard connecting cable for the MD4 modem
Order no.
6NH7700-4AR60
Note
It is best to hold the cable just below the RJ-12 plug. This makes it easier to insert the plug
than if you hold the RJ-12 plug itself. When inserting it, make sure that you can hear the RJ-
12 connector click into place!
228
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 con-
nect an MD4 modem (RJ-12) with an ISDN-S
45).
Cable length 6 m
Signal direction
outlet.
0
Illustration
jack (RJ-
0
System Manual, 09/2016, C79000-G8976-C178-10
Remark
SINAUT ST7 station control system
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