快毕业，校园网到期了，不想再用锐捷上网。在图书馆用wifi无线，在宿舍打算用3G。

于是买了个3G网卡: 华为EC122
硬件信息如下:

$ lsusb | grep -i Huawei Bus 003 Device 006: ID 12d1:1001 Huawei Technologies Co., Ltd. E620 USB Modem $

这个3G网卡支持中国电信天翼3G标准CDMA2000 ，下载内核网速刚开始为40K/S，然后彪到了200K+/S (不是在做广告……)

笔者使用软件平台为Debian5.02，系统具体参数为

$ cat /proc/version Linux version 2.6.26-2-686 (Debian 2.6.26-19) (dannf@debian.org) (gcc version 4.1.3 20080704 (prerelease) (Debian 4.1.2-25)) #1 SMP Wed Aug 19 06:06:52 UTC 2009 $

1. 安装驱动

插入3G网卡到USB接口后，GNU/Linux识别该硬件，自动将其挂载到 /media/ChinaTelecom 目录下

$ pwd /media/ChinaTelecom $ ls -F AutoRun.exe*  autorun.inf*  autorun.sh*     Linux/  SysConfig.dat* autorun.ico*  autorun.ini*  install_linux*  setup/ $ ./install_linux

这样，驱动就安装好了……快吧

2. 配置拨号上网

笔者喜欢用 wvdial 同时管理 “3G、连手机蓝牙、连手机USB” 3种拨号方式 ，所以下面介绍用 wvdial 3G拨号及其配置过程

先介绍配置过程:
插入3G网卡到USB接口后，待其识别该硬件，运行

$ sudo wvdialconf [sudo] password for c-aries: Editing `/etc/wvdial.conf'. Scanning your serial ports for a modem. ... (省略) Found a modem on /dev/ttyUSB_utps_modem. Modem configuration written to /etc/wvdial.conf. ttyUSB_utps_modem<Info>: Speed 115200; init "ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0" ttyUSB_utps_pcui<Info>: Speed 9600; init "ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0" $

这里默认配置已写入文件 /etc/wvdial.conf 如下

$ cat /etc/wvdial.conf [Dialer Defaults] Init2 = ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0 Modem Type = Analog Modem ; Phone = <Target Phone Number> ISDN = 0 ; Username = <Your Login Name> Init1 = ATZ ; Password = <Your Password> Modem = /dev/ttyUSB_utps_modem Baud = 115200

修改成

$ cat /etc/wvdial.conf [Dialer 3G] Init2 = ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0 Modem Type = Analog Modem Phone = #777 ISDN = 0 Username = ctnet@mycdma.cn Init1 = ATZ Password = vnet.mobi Modem = /dev/ttyUSB_utps_modem Baud = 115200

拨号运行命令

$ sudo wvdial 3g --> WvDial: Internet dialer version 1.60 --> Cannot get information for serial port. --> Initializing modem. --> Sending: ATZ ATZ OK --> Sending: ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0 ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0 OK --> Modem initialized. --> Sending: ATDT#777 --> Waiting for carrier. ATDT#777 CONNECT --> Carrier detected.  Waiting for prompt. ~[7f]}#@!}!}!} }5}"}&} } } } }#}%B#}%}%}&&qe8@F~ --> PPP negotiation detected. --> Starting pppd at Sun Mar  7 09:44:49 2010 --> Pid of pppd: 26853 --> Using interface ppp0 --> pppd: ≒s HPs --> pppd: ≒s HPs --> pppd: ≒s HPs --> pppd: ≒s HPs --> pppd: ≒s HPs --> local  IP address 113.113.169.226 --> pppd: ≒s HPs --> remote IP address 10.10.88.48 --> pppd: ≒s HPs --> primary   DNS address 202.96.128.86 --> pppd: ≒s HPs --> secondary DNS address 220.192.32.103 --> pppd: ≒s HPs

拨号成功 : )

3. 附赠-我的wvdial.conf

$ cat /etc/wvdial.conf [Dialer usb] Init1 = ATZ Init2 = AT&FE0V1&C1S0=0 Init3 = AT+cgdcont=1,"IP","CMNET","",0,0 Password = 172 New PPPD = yes Phone = *99***2# Idle Seconds = 3000 Modem Type = USB Modem Stupid Mode = 1 Baud = 460800 Auto DNS = 1 Dial Command = ATD Ask Password = 0 ISDN = 0 Username = 172 FlowControl = NOFLOW Modem = /dev/ttyACM0 [Dialer bt] Init1 = ATZ Init2 = AT&FE0V1&C1S0=0 Init3 = AT+cgdcont=1,"IP","CMNET","",0,0 Password = 172 New PPPD = yes Phone = *99***2# Idle Seconds = 3000 Modem Type = BlueTooth Modem Stupid Mode = 1 Baud = 460800 Auto DNS = 1 Dial Command = ATD Ask Password = 0 ISDN = 0 Username = 172 FlowControl = NOFLOW Modem = /dev/rfcomm0 [Dialer 3G] Init2 = ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0 Modem Type = Analog Modem Phone = #777 ISDN = 0 Username = ctnet@mycdma.cn Init1 = ATZ Password = vnet.mobi Modem = /dev/ttyUSB_utps_modem Baud = 115200

3g