On Wed, October 17, 2012 12:49, James B. Byrne wrote:
> How, exactly, does CentOS-6.3 with udev recognize an USB modem when it
> is plugged in. How is it indicated? What other configuration is
> required?
I now have the subject modem device attached to a kvm guest instance.
I can connect to it from the guest using picocom. I can see the TR
light go on. I cannot find a baud rate with which to issue AT
commands.
If I use a baud rate of 38400, 57600 or 115200 and issue ATI then I
get back a variable number of unprintable (white question mark on
black background mostly) characters, with 115200 returning the longest
string. If I use any rate below 38400 I see nothing.
# picocom -b 115200 /dev/ttyACM0
picocom v1.6
port is : /dev/ttyACM0
flowcontrol : none
baudrate is : 115200
parity is : none
databits are : 8
escape is : C-a
local echo is : no
noinit is : no
noreset is : no
nolock is : no
send_cmd is : sz -vv
receive_cmd is : rz -vv
imap is :
omap is :
emap is : crcrlf,delbs,
Terminal ready
����������֮͠����Թ��������� ������������������������썊������ҍ�
The same modem responded correctly to ATI commands issued in a 9600
baud picocom connection when the modem was attached to the host
system.
# picocom /dev/ttyACM0
picocom v1.6
port is : /dev/ttyACM0
flowcontrol : none
baudrate is : 9600
parity is : none
databits are : 8
escape is : C-a
local echo is : no
noinit is : no
noreset is : no
nolock is : no
send_cmd is : sz -vv
receive_cmd is : rz -vv
imap is :
omap is :
emap is : crcrlf,delbs,
Terminal ready
ATI
Agere OCM V.92 MT9234ZBA-USB Data/Fax Modem Version 1.02l
Does anyone have any idea what is happening and how to correct this?
--
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James B. Byrne mailto:ByrneJB@xxxxxxxxxxxxx
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