3G 拨号问题

forlinx2011

环境Linux3.0.1 3G模块ZTE AC2726   电信CDMA2000 1..插上3G模块后，/dev下增加一个usbdev1.1，并没有出现ttyUSB0~ttyUSB4.使用./pppd call cdma2000,提示 [root@FORLINX6410]# pwd /opt/3G/bin [root@FORLINX6410]# ./pppd call cdma2000 ./pppd: In file /etc/ppp/peers/cdma2000: unrecognized option '/dev/ttyUSB0' 2.应该是驱动没有正常安装。但是运行官方提供的3GDialup后，系统就会提示 [root@FORLINX6410]# usb 1-1: usbfs: process 135 (usb_modeswitch) did not claim i nterface 0 before use usb 1-1: USB disconnect, device number 2 usb 1-1: new full speed USB device number 7 using s3c2410-ohci usb 1-1: New USB device found, idVendor=19d2, idProduct=fff1 usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0 usb 1-1: Product: ZTE CDMA Tech usb 1-1: Manufacturer: ZTE, Incorporated pl2303 1-1:1.0: pl2303 converter detected usb 1-1: pl2303 converter now attached to ttyUSB0 pl2303 1-1:1.1: pl2303 converter detected usb 1-1: pl2303 converter now attached to ttyUSB1 pl2303 1-1:1.2: pl2303 converter detected usb 1-1: pl2303 converter now attached to ttyUSB2 pl2303 1-1:1.3: pl2303 converter detected usb 1-1: pl2303 converter now attached to ttyUSB3 pl2303 1-1:1.4: pl2303 converter detected usb 1-1: pl2303 converter now attached to ttyUSB4 scsi1 : usb-storage 1-1:1.5 scsi 1:0:0:0: Direct-Access     ZTE      USB Storage FFF1 2.31 PQ: 0 ANSI: 2 sd 1:0:0:0: Attached scsi generic sg0 type 0 sd 1:0:0:0: [sda] Attached SCSI removable disk 能将usb1.1转换为ttyUSB0~4,而且拨号成功 3.然后在/dev下就有了ttyUSB0~4 4.然后再使用./pppd call cdma2000拨号就能成功。   第一个问题：不知到3GDialup怎么将usb转换为ttyUSB0~4的？我用手动安装如何实现   第二个问题：不管是手动连接还是3GDialup，当连接上之后如果ping www.baidu.com都能成功，只要一直ping不停止，连接一直保持，一旦停止ping等等1，2秒，就会断开连接，提示如下64 bytes from 119.75.218.77: seq=153 ttl=53 time=59.448 ms 64 bytes from 119.75.218.77: seq=154 ttl=53 time=122.508 ms 64 bytes from 119.75.218.77: seq=155 ttl=53 time=77.247 ms ^C --- www.baidu.com ping statistics --- 156 packets transmitted, 156 packets received, 0% packet loss round-trip min/avg/max = 59.448/88.407/441.169 ms [root@FORLINX6410]# Modem hangup Connect time 3.0 minutes. Sent 13222 bytes, received 13308 bytes. Connection terminated. 连接中止了，好像超时了？然后再ifconfig 64 bytes from 119.75.218.77: seq=153 ttl=53 time=59.448 ms 64 bytes from 119.75.218.77: seq=154 ttl=53 time=122.508 ms 64 bytes from 119.75.218.77: seq=155 ttl=53 time=77.247 ms ^C --- www.baidu.com ping statistics --- 156 packets transmitted, 156 packets received, 0% packet loss round-trip min/avg/max = 59.448/88.407/441.169 ms [root@FORLINX6410]# Modem hangup Connect time 3.0 minutes. Sent 13222 bytes, received 13308 bytes. Connection terminated. [1] + Done(16)                   ./pppd call cdma2000 [root@FORLINX6410]# ifconfig [root@FORLINX6410]# 第一个问题解决了，通过分析官方的3GDiaup代码发现，其执行了一个命令./usb_modeswitch -c usb_modeswitch.d/19d2^%fff5 -W 实现了USB到串口的处理。 通过分析官方3GDialog代码发现，其实就是执行了两条命令 1.首先通过读取/sys/bus/usb/devices/1-1/idVendor和/sys/bus/usb/devices/1-1/idProduct获得设备Vid和Pid 2.然后执行./usb_modeswitch -c usb_modeswitch.d/19d2^%fff5 -W命令（其中19d2为Vid和fff5为Pid）实现usb串口的映射 3.然后执行/opt/3G/bin/pppd call cdma2000实现拨号 4.其中状态框中的内容就是从终端上读出的内容放到了文本框中（不知道这句话对不对） 就剩下最后一个问题了，网络拨通之后不和某个Server保持连接，自动就会断开。如果一直ping 某个server也不会断，一旦停止ping ，停几秒就断。提示如次： PAP authentication succeeded local  IP address 1.198.20.80 remote IP address 115.168.79.5 primary   DNS address 222.85.85.85 secondary DNS address 222.88.88.88 [root@FORLINX6410]# ping www.baidu.com PING www.baidu.com (220.181.111.147): 56 data bytes 64 bytes from 220.181.111.147: seq=0 ttl=53 time=73.823 ms 64 bytes from 220.181.111.147: seq=1 ttl=53 time=79.310 ms ^C --- www.baidu.com ping statistics --- 2 packets transmitted, 2 packets received, 0% packet loss round-trip min/avg/max = 73.823/76.566/79.310 ms [root@FORLINX6410]# Modem hangup Connect time 0.5 minutes. Sent 286 bytes, received 356 bytes. Connection terminated.