WCDMA上网拨号，pppd运行不成功
大家好！我要在arm上实现wcdma上网，请有故经验的高手指点！ 

设备是：一个中兴MC8630，内插联通卡，连接usb，虚拟成串口 
pppd connect 'chat -v "" "AT" "" "ATDT#777 CONNECT"' user CARD password CARD /dev/ttyUSB0 460800 nodetach crtscts debug usepeerdns defaultroute

输出：
zte ev enter---
Serial connection established.
using channel 8
Using interface ppp0
Connect: ppp0 <--> /dev/ttyUSB0
sent [LCP ConfReq id=0x1 <mru 1492> <asyncmap 0x0> <magic 0x61dd77a8> <pcomp> <accomp>]
sent [LCP ConfReq id=0x1 <mru 1492> <asyncmap 0x0> <magic 0x61dd77a8> <pcomp> <accomp>]
sent [LCP ConfReq id=0x1 <mru 1492> <asyncmap 0x0> <magic 0x61dd77a8> <pcomp> <accomp>]
sent [LCP ConfReq id=0x1 <mru 1492> <asyncmap 0x0> <magic 0x61dd77a8> <pcomp> <accomp>]
sent [LCP ConfReq id=0x1 <mru 1492> <asyncmap 0x0> <magic 0x61dd77a8> <pcomp> <accomp>]
sent [LCP ConfReq id=0x1 <mru 1492> <asyncmap 0x0> <magic 0x61dd77a8> <pcomp> <accomp>]
sent [LCP ConfReq id=0x1 <mru 1492> <asyncmap 0x0> <magic 0x61dd77a8> <pcomp> <accomp>]
sent [LCP ConfReq id=0x1 <mru 1492> <asyncmap 0x0> <magic 0x61dd77a8> <pcomp> <accomp>]
sent [LCP ConfReq id=0x1 <mru 1492> <asyncmap 0x0> <magic 0x61dd77a8> <pcomp> <accomp>]
sent [LCP ConfReq id=0x1 <mru 1492> <asyncmap 0x0> <magic 0x61dd77a8> <pcomp> <accomp>]
LCP: timeout sending Config-Requests
Connection terminated.

不知道大家有没有遇到过？有的话该怎么解决！谢谢啦！

------解决方案--------------------
我目前就在做3G上网卡在linux下拨号的可视化客户端的开发
建议你换个思路拨号上网。
首先确认/dev目录下已经有ttyUSB0设备，如果么有则上网卡还没有被系统内核加载，可以用modprobe命令
然后把拨号的配置信息写到wvdial.conf文件里面，存到/etc目录中
然后用一般Linux系统自带的wvdial工具拨号即可，即直接在终端输入wvdial即可

上面的信息应该对你有用吧
------解决方案--------------------
http://www.nabble.com/Error:-LCP:-timeout-sending-Config-Requests-td21528066.html
------解决方案--------------------
我也遇到过类似的问题，已经发你邮箱了～