Use the terminal mode of the Device Configuration Utility (select Unknown for Device type) set to 9600 baud. Click the Connect button to open the terminal screen.
On the SRM-5A, short together the RCV + to the XMT +, and the RCV – to the XMT – connections. Try typing letters and numbers with the computer keyboard. If these do not appear on the terminal screen, the modem is damaged and must be replaced. Ensure that the Echo Input box is NOT selected.