为什么我的GPRS模块在linux下能拨通网络，但却收不到数据

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为什么我的GPRS模块在linux下能拨通网络，但却收不到数据 [复制链接]

系统是fedora7，以下是我的拨号信息
Press CTRL-C to close the connection at any stage!
defining PDP context...

OK

OK

OK
AT+CGDCONT=1,"IP","GZEUNT.GD"
OK
waiting for connect...

ATD*99***1#
CONNECT
Connected.
If the following ppp negotiations fail,
try restarting the phone.

Serial connection established.
using channel 13
Using interface ppp0
Connect: ppp0 <--> /dev/ttyS0
Warning - secret file /etc/ppp/pap-secrets has world and/or group access
sent [LCP ConfReq id=0x1 ]
rcvd [LCP ConfNak id=0x1 ]
sent [LCP ConfReq id=0x2 ]
rcvd [LCP ConfAck id=0x2 ]
rcvd [LCP ConfReq id=0x3 ]
sent [LCP ConfRej id=0x3 ]
rcvd [LCP ConfReq id=0x5 ]
sent [LCP ConfNak id=0x5 ]
rcvd [LCP ConfReq id=0x7 ]
sent [LCP ConfAck id=0x7 ]
Warning - secret file /etc/ppp/pap-secrets has world and/or group access
sent [PAP AuthReq id=0x1 user="foo" password=]
rcvd [PAP AuthAck id=0x1 ""]
PAP authentication succeeded
sent [IPCP ConfReq id=0x1 ]
rcvd [IPCP ConfReq id=0x1 ]
sent [IPCP ConfAck id=0x1 ]
rcvd [IPCP ConfRej id=0x1 ]
sent [IPCP ConfReq id=0x2 ]
rcvd [IPCP ConfNak id=0x2 ]
sent [IPCP ConfReq id=0x3 ]
rcvd [IPCP ConfAck id=0x3 ]
local  IP address 10.12.135.253
remote IP address 192.168.254.254
Script /etc/ppp/ip-up started (pid 5970)
Script /etc/ppp/ip-up finished (pid 5970), status = 0x0
Terminating on signal 2
Connect time 3.1 minutes.
Sent 4808 bytes, received 0 bytes.
Script /etc/ppp/ip-down started (pid 6050)
sent [LCP TermReq id=0x3 "User request"]
rcvd [LCP TermAck id=0x3 "User request"]
Connection terminated.

Sending break to the modem

PDP context detached
Serial link disconnected.
Script /etc/ppp/ip-down finished (pid 6050), status = 0x0


可以看到发送了4808 bytes却收不到数据，另外ping自己的IP能ping通，以前在windows下也碰到过这种问题，我把网卡禁用了就行了，但在linux下却不行了，哪位帮忙看下，谢谢