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Old 05-27-2003, 03:07 AM   #1
Registered: Aug 2001
Location: Australia
Distribution: Fedora
Posts: 32

Rep: Reputation: 15
Problem with CD signal, modem on USB port


to free up a serial port i obtained a USB to serial adapter to connect a modem to my server. This modem is used for remote dialin only. The adapter and modem are quite happy on the USB port with mgetty working well. the problem I have is that of a low DCD (carrier detect signal) which is suppost to be high upon a connection being made. As a result /bin/login is frezzing at the password stage. The modem is already being configured with the AT string "&c1".

Is it possible to turn off the DCD in RedHat 8.0. I beleive that the CD signal is for security purposes (snoppping), however the number is silent and only I know it exists.

Any help is appreciatred

Old 05-27-2003, 03:15 AM   #2
Registered: Aug 2001
Location: Australia
Distribution: Fedora
Posts: 32

Original Poster
Rep: Reputation: 15
I have also tried changing the "modem has DCD line" in `minicom' to no avail.



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