The CPM can either be controlled by a local PC that communicates via cable, or controlled by
a remote PC that communicates via modem. For the purpose of this overview, a local PC
running ProComm (or a similar communications program), will be cable connected to CPM
Note: Communication via Modem (Optional): If desired, this overview can also
be performed via modem.
Perform the following procedure to connect a PC to Port 1.
1. Attach an appropriate Snap Adapter to your PC COM port. Make certain to connect to
the PC COM port used by your communications program.
a) For 25 pin PC COM ports, use the SA-12F Snap Adapter supplied with the CPM.
b) For nine pin PC COM ports, use the SA-9F Snap Adapter supplied with the CPM.
c) For a description of the Snap Adapter interface, please refer to Appendix A.
2. Attach one end of the RJ11 cable (included with the CPM) to Port 1. Attach the other end
of the cable to the Snap Adapter installed in your PC COM port. Note that the cable used
for connection must be a six wire, straight wired RJ11 cable.
3.3. Apply Power to the CPM
Connect the power cable to the CPM and plug the cable into an AC power source. Press the
Power Switch to ON. The ON LED should light, and the RDY LED should begin to flash.
Note: If all Port Activity LEDs flash upon power-up, this may indicate a problem
with the CPM unit. Please contact WTI Technical Support as described in
CPM Series - Control Port Managers, User's Guide Getting Started