Black Box MD1641A, MD1640A manual Modem Does Not Respond to Commands

SERIES II INTELLIGENT DATA/FAX MODEMS

•If the power strip is on and the modem switch is on, try moving the modem power supply to another outlet on the power strip.

•Test that the outlet is live by plugging a lamp into it.

•The modem or power supply may be defective. If you have another Series II Modem, try swapping modems. If the problem goes away, the first modem or power supply may be defective. Call Tech Support for assistance.

CAUTION: Do not under any circumstances replace the power supply module with one designed for another product, as it may damage the modem and void your warranty.

The Modem Does Not Respond to Commands

•Make sure the modem is plugged in and turned on. (See “None of the LEDs Light When the Modem Is On.”)

•Make sure you are issuing the modem commands from the data communications software, either manually in terminal mode or au- tomatically by configuring the software. (You cannot send com- mands to the modem from the DOS prompt.)

•Make sure you are in terminal mode in your data communications program, then type AT and press ENTER. If you get an OK re- sponse, your connections are good and the problem likely is in your phone book entry or session settings.

•Try resetting your modem by turning it off and on. Make sure there is a reset command (&F) in your initialization string, or your modem may not initialize correctly.

•If you don’t get an OK, the problem may still be in the communica- tions software. Make sure you have done whatever is necessary in your software to make a port connection. Not all communications programs connect to the COM port automatically. Some connect when the software loads and remain connected until the program terminates. Others can disconnect without exiting the program (make sure the Connect icon looks plugged in). If the terminal reports that it cannot make a connection, yet the modem’s TR indi- cator is on, click on the Window menu to see if more than one ter- minal is open. The modem’s TR indicator shows that the software has made a connection with the modem through the COM port.

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