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4-2
APS-8M / APS-16M Asynchronous Port Switches; 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-8/16M back panel. Note that the APS-8M sees
the internal modem as Port 8, and the APS-16M sees the internal modem as
Port 17.
4.3. Connecting Devices to the APS Serial Ports
The serial RS232 Ports are standard DB9 connectors, configured as DTE Ports,
and are similar to a standard serial port on a PC. The APS-8M includes seven
serial RS232 ports, and the APS-16M includes sixteen serial RS232 ports. For
a detailed description of the RS232 Port interface, please refer to Appendix A.
1. Access the APS-8/16M 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-8/16M.
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.