On 02/06/2013 03:46 PM, Patrick Dupre wrote:
cat /dev/ttyUSB3
gives:
AT+CIND?
+CIND: 5,1,1,1,0,0,1,0
Back in the Old Days, I'd sometimes have callers open up a terminal
(This was Win95/98 where there was a way to talk directly to the modem
before dialing.) and query the modem directly to make sure it was
working, and check some of its abilities. (You might be surprised to
learn how many people simply assumed that their modem was 56K and
wondered why it couldn't connect because it was only 28.8 or lower.)
Alas, I've long forgotten the exact commands used, but here's what
claims to be a complete list: http://michaelgellis.tripod.com/modem.html
although I don't see the command to give the max speed. (Maybe AT by
itself?) If you try this and get no response, try this:
ATE1
And, if you get OK, try again. I'm not sure this is what you need, but
it may point you in the right direction and it's one of those old-time
things that shouldn't be completely forgotten as long as computers have
modems, even if only for faxing. (Yes, even fax modems respond to this.)
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