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Installation
2.6.1
SCU Rear Panel
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2.6.1.1
User Remote (J1)
This port is connected to a control device, such as a terminal or personal computer. The
control device then communicates with the switch and associated modems using the
protocol defined in Appendix A. The user remote interface can be an EIA-485 or EIA-
232, 110 to 19200 baud. The connector is a 9-pin female D with the pinouts as shown in
Table 2-4.
Table 2-4. User Remote EIA-485/EIA-232 Connector (J1)
2–22
Figure 2-6. SCU Rear Panel
EIA-485
Pin #
4-Wire
1
GND
GND
2
3
4
+TX
+RX/TX
5
-TX
-RX/TX
6
7
8
+RX
+RX/TX
9
-RX
-RX/TX
SMS-7000 Modem Protection Switch
EIA-232
2-Wire
GND
RD
TD
GND
DSR
RTS
CTS
Rev. 3
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