Installing and putting a SINAUT modem into operation
6.4 MD2 dedicated line modem
SINAUT ST7 Station control system - System Manual
System Manual, 05/2007, C79000-G8976-C178-06
249
DIL switch for activating WAN terminating resistors
On the bottom of the MD2 housing, a further 4-pin DIL switch is accessible. This switch
activates terminating resistors at the WAN end. The following figure summarizes the possible
settings, the table lists the default settings.
2))
21
RKPVFKDQQHO
RKPVFKDQQHO
+LJKUHVLVWDQFH
FKDQQHO
+LJKUHVLVWDQFH
FKDQQHO
RKPVFKDQQHO
RKPVFKDQQHO
Figure 6-14 Possible settings for the WAN terminating resistors
Table 6-16 Default settings for the WAN terminating resistors
Attachment type
Baud rate
Setting on DIL switch
Remark
1200 bps
2400 bps
2))
21
The MD2 is located at the beginning or end of
a 2-wire or 4-wire line and is set to a
transmission speed of 1200 or 2400 bps
End point
2-wire (channel 1)
2 x 2-wire (channel 1+2)
4-wire
9600 bps
19200 bps
2))
21
End point as above but with transmission
speed set to 9600 or 19200 bps.
1200 bps
2400 bps
2))
21
The MD2 is not located at the beginning or
end of a 2-wire line; it taps into this 2-wire line
along the way with high resistance. The
transmission speed is set to 1200 or 2400
bps.
Tapping point
2-wire (channel 1)
9600 bps
19200 bps
2))
21
End point as above but with transmission
speed set to 9600 or 19200 bps.
Tapping point
4-wire
1200 bps
2400 bps
9600 bps
19200 bps
2))
21
The MD2 is not located at the beginning or
end of a 4-wire line; it taps into this 4-wire line
along the way with high resistance.
Pinout of the RJ-12 Western jack
The X3 connector is designed as a 6-pin RJ-12 Western jack. The pinout is shown in the
following table.
