On Mon, Sep 26, 2011, Graham Johnston wrote:
>I am having an issue with Centos 6 and an external USRobotics modem. We
>use the modem as part of a last resort SMS paging system.
>
>Across multiple Dell servers, different models, I can't not get the
>modem to respond to simple AT commands while using Minicom. At the same
>time if I connect the server to a console port on a switch I can
>successfully access the switches serial console. So I know the serial
>port itself is working. The modem still works fine if connected to a
>Centos 5 server.
>
>Any thoughts?
Which device are you using for the serial connection. It should be
/dev/ttyS0 or similar to provide the correct modem control signals. The
modem probably won't respond unless the DTR (Data Terminal Ready) line is
up. It's been quite a while since I had to look at the modems on our
system that runs HylaFAX and dialup connections,
Bill
--
INTERNET: bill@xxxxxxxxxxxxx Bill Campbell; Celestial Software LLC
URL: http://www.celestial.com/ PO Box 820; 6641 E. Mercer Way
Voice: (206) 236-1676 Mercer Island, WA 98040-0820
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or impede their efforts to obtain it. -- John Stuart Mill, 1859
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