red lion BT-6821-AT-AC User Manual page 55

12.1.4 (SERIAL) The BlueVue Device Manager message box displays "Detecting modem on
COMx" indefinitely, or displays a warning about an unsupported modem
Examine the DTR LED. If it is off, then the computer and the modem are not communicating.
Possible cause
The wrong type of cable is being used.
Troubleshooting
Use a straight-through RS232 standard DB9 cable. If using a custom-made cable, confirm that it follows the instructions
in Section 11.6. If the correct cable is being used, then the DTR LED on the modem will turn on when BlueVue Device
Manager attempts to access it.
Possible cause
BlueVue Device Manager is trying to connect to the wrong COM port.
Troubleshooting
Confirm that the correct COM port is selected in BlueVue Device Manager. It will attempt to use COM1 by default, but
computers with built-in dial-up modems might have COM1 assigned to the built-in modem instead. To set the COM port
BlueVue Device Manager should use, click on Tools > Settings > Connection and browse through the available COM
ports. If the DTR LED turns on, then you will have found the right COM port.
12.1.5 (SERIAL) The BlueVue Device Manager message box displays "Detecting modem on
COMx" and then "Modem is not responding"
Possible cause
BlueVue Device Manager and the modem are using different serial port settings.
Troubleshooting
Installing BlueVue Device Manager 1.7.1 or later will allow communication with a modem regardless of its serial settings.
12.1.6 The BlueVue message box displays "[Modem]...is not responding to expected commands.
Contact BlueTree Support."
Possible cause
BlueVue Device Manager has detected a potential hardware issue.