Appendix A. Changing COM220 Settings
FIGURE
To configure the COM220 with Hayes AT commands, follow these steps:
1)Close DIP Switch 8 on the COM220 (power to the COM220 must be cycled for ~ 5 sec before changes to DIP switch settings are effective).
2)You must use an SC532A with a 12V AC adapter or an SC532 interface to communicate with the modem. Connect the “PC” port (called “RS232” on the SC532) to a serial port on your computer via an RS232 cable. Leave the COM220 modem disconnected for now.
3)Run Device Configuration ver 1.6 utility or newer.
4)Select Com220 from the Device Configuration utility menu (Figure
5)Make sure the appropriate serial port is selected on the left panel of the Device Configuration utility window and click on the connect button.
6)Once you have clicked on the connect button, connect the peripheral port on the SC532(A) or SC532 to the CS I/O port on the modem with a SC12 cable. If using a SC532, you will also have to apply 12V to the COM220 via a green connector attached to a power supply. If using an SC532A device, power will be provided to the modem by the SC532A (NOTE: you must click on the connect button BEFORE applying power to the COM220).