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4-2
APS-8M Asynchronous Port Switch; User’s Guide
4.2. Connect a Telco Line to the Modem Port
Use a standard RJ-11 cable to connect your Telco outlet to the Modem (Line)
Port, located on the APS-8M back panel. Note that the unit sees the internal
modem as Port 8.
4.3. Connecting Devices to the APS Serial Ports
APS RS232 Ports one through seven are standard DB9 connectors, configured
as DTE Ports, and are similar to a standard serial port on a PC. For a detailed
description of the RS232 Port interface, please refer to Appendix A.
1. Access the APS-8M command mode.
2. Determine which RS232 port will be used for connection to the new
device (e.g. Port 3).
3. Use an appropriate DB9 cable to connect the RS232 serial port on the
device to the selected DB9 port on the APS.
a) External Modems and other DCE Devices: Use a standard serial
modem cable.
b) PCs and other DTE Devices: Use a standard null modem cable.
5. Select communication parameters for the port as described in Section 5.