Thanks, Tommy! So after I use "ATD*99***1#" dial command, I must send "ATH"
to modem immediately?
2009/11/6 tommy tommy <hongjiuj...@gmail.com>
> it is HW issue ,i guess your modem is under uncorrect state,i met similiar
> problem a few days ago!
>
> please check you use AT port or PPP network dial port ,or you need "ATH"
> after the first time exit to let modem RESET!
>
>
>
> 2009/11/6 Herman <hermanmao...@gmail.com>
>
>> Hi Eric,
>>
>> I have already chosen that. But it has the same result.
>>
>> Br,
>> Herman
>>
>> 2009/11/5 Eric.Wang <ack0...@gmail.com>
>>
>> confirm your kernel menuconfig and try again
>>> (*) PPP support for async serial ports
>>> (*) PPP support for sync tty ports
>>>
>>> On Oct 21, 4:44 pm, Herman <hermanmao...@gmail.com> wrote:
>>> > Hi all,
>>> >
>>> > I try to enable data connection function through external modem. It can
>>> dial
>>> > but data connection failed. PPPD can't work well. In PPP daemon, it
>>> showed
>>> > "Couldn't set tty to PPP discipline: m". I used 2.6.26 kernel before,
>>> but
>>> > now I used 2.6.29 kernel. In kernel configuration, I have already
>>> enabled
>>> > "Device Drivers->Network device support->PPP support". They have same
>>> result
>>> > in io control "TIOCSETD", it seems that it can't set to data
>>> discipline. I
>>> > use USB to Serial converter interface, below is log of radio and pppd.
>>> Does
>>> > anyone have suggestions? Thanks.
>>> >
>>> > D/AT ( 606): AT> ATD*99***1#
>>> > D/AT ( 606): AT< ATD*99***1#
>>> > D/AT ( 606): AT< CONNECT 115200
>>> > D/RILJ ( 662): [0041]< SETUP_DEFAULT_PDP {1, ppp0}
>>> > D/GSM ( 662): [PdpConnection] PDP setup on cid = 1
>>> > I/pppd ( 806): Starting pppd
>>> > E/pppd ( 807): Couldn't set tty to PPP discipline: m
>>> > D/AT ( 606): AT< ~ }# !}!}!} }<}!}$}% }"}&} } } } }%}&} } }
>>> }}'}"}(}"}#}$ # U~
>>> >
>>> > D/AT ( 606): AT< OK
>>> > I/pppd ( 812): pppd exited with 1
>>> > I/pppd ( 816): Starting pppd
>>> > E/pppd ( 817): Couldn't set tty to PPP discipline: m
>>> > I/pppd ( 820): pppd exited with 1
>>> > I/pppd ( 824): Starting pppd
>>> > E/pppd ( 825): Couldn't set tty to PPP discipline: m
>>> > I/pppd ( 828): pppd exited with 1
>>> > I/pppd ( 832): Starting pppd
>>> > E/pppd ( 833): Couldn't set tty to PPP discipline: m
>>> > I/pppd ( 836): pppd exited with 1
>>> >
>>> > Best regards,
>>> > Herman
>>>
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