尊敬的大大、感谢你抽空指导我
我的设备是db120 mu350 和广东无限卡
版本是OpenWrt Backfire 10.03.336 DIY full
一、 没有安装到kmod-usb-acm 为什么？
二、 我在终端入启路由，插上MU350，WinSCP连接到路由，打开终端输入命令查看是否MU350已被识别。显示如下 （与你所写的不一样，请问我的mu350识别了没有）
/etc/modules.d$ dmesg | grep usb
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
usbcore: registered new interface driver rtl8187
usbcore: registered new interface driver p54usb
usb usb1: configuration #1 chosen from 1 choice
usb usb2: configuration #1 chosen from 1 choice
usb 2-1: new full speed USB device using bcm63xx_ohci and address 2
usbcore: registered new interface driver usblp
usbcore: registered new interface driver usbserial
usb 2-1: configuration #1 chosen from 1 choice
usbserial_generic 2-1:1.0: generic converter detected
usb 2-1: generic converter now attached to ttyUSB0
usbcore: registered new interface driver usbserial_generic
usbserial: USB Serial Driver core
usbcore: registered new interface driver usb-storage
usbcore: registered new interface driver zd1211rw
三、这一步省略了上面是讲的3G上网卡的识别。如你的3G上网卡不能关闭存储模式，那就要用到usb-modeswitch了，这个软件前面我们已经装了。
我们直接新建/etc/usb-modeswitch.conf,内容如下：
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CODE:
# ZTE MU350
#
# Contributor: Dale Lane
DefaultVendor= 0x19d2;
DefaultProduct= 0x0003
# choose one of these:
DetachStorageOnly=0
MessageContent=5553424312345678000000000000061b000000020000000000000000000000
再执行usb_modeswitch -W，就能把MU350切换到modem模式了。
使用usb-modeswitch后，设备不一定是/dev/usb/tts/0或者/dev/ttyUSB0，也有可能是/dev/usb/tts/1或者/dev/ttyUSB1
3G网卡的识别最重要的是/etc/usb-modeswitch.conf的创建，相关网卡的信息需要大家一起研究和收集了。
另外如果华为的卡用usb-modeswitch不能被识别，可以试试安装这个包：huaweiaktbbo
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CODE:
opkg install huaweiaktbbo
然后直接运行命令：huaweiaktbbo
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CODE:
huaweiaktbbo
RG100A路由猫刷openwrt使用3G上网卡与宽带合并教程http://blog.sina.com.cn/s/blog_64b4ea3a0101655r.html
rg100a使用OpenWrt，单路由实现多个3G上网卡宽带合并: http://forum.51nb.com/viewthread.php?tid=1034040&extra=page%3D1&highlight=openwrt%2B3g%CD%F8%BF%A8&page=1
3G 无线上网卡拨号 -- 以华为 EC189 为例
USB 3G 网卡默认模式为闪存设备，使用 usb-modeswitch 切换 3G 网卡为 usbserial 模式，最终使用 pppd 拨号上网。
内核配置
只需选上 ppp 和 usbserial
DeviceDrivers --->
[*] Network device support-->
<*> PPP (point-to-point protocol) support
[*] PPP multilink support (EXPERIMENTAL)
[*] PPP filtering
<*> PPP support for async serial ports
<*> PPP support for sync tty ports
<*> PPP Deflate compression
<*> PPP BSD-Compress compression
<*> PPP MPPE compression (encryption) (EXPERIMENTAL)
[*]USB support --->
<*> USB Serial Converter support --->
[*] USB Generic Serial Driver
<*> USB driver for GSM and CDMA modems
openwrt 所需软件
ppp
chat
comgt
libpthread
librt
libusb-1.0
usb-modeswitch
zlib
openwrt 配置文件
网络配置文件 /etc/config/network
configinterface wan
optionifname ‘ppp0‘
optionservice ‘evdo‘
optiondevice ‘/dev/ttyUSB0‘
optionusername ‘[email protected]‘
optionpassword ‘vnet.mobi‘
optionproto 3g
optionauto 1
chat 配置文件 /etc/chatscripts/evdo.chat
ABORT BUSY
ABORT ‘NO CARRIER‘
ABORT ERROR
REPORT CONNECT
TIMEOUT10
‘‘ AT
‘OK-+++\c-OK‘ATH0
TIMEOUT40
‘‘ AT
OK ‘ATDT#777‘
CONNECT‘‘
vi /etc/config/network
config interface ‘wan‘
#option ifname ‘eth0‘
#option proto ‘dhcp‘
option proto ‘3g‘
option service ‘evdo‘
option username ‘[email protected]‘
option password ‘vnet.mobi‘
option device ‘/dev/ttyUSB0‘
chat配置文件/etc/chatscripts/evdo.chat
ABORT BUSY
ABORT ‘NO CARRIER‘
ABORT ERROR
REPORT CONNECT
TIMEOUT10
‘‘ AT
‘OK-+++\c-OK‘ATH0
TIMEOUT40
‘‘ AT
OK ‘ATDT#777‘
CONNECT‘‘