MC39i GPRS拔号错误

[lirun]

大家好,最近我在用GPRS 进行PPPoE拔号时遇到了问题,PPPd老是提示我如下信息:
Serial connection established.
using channel 7
Using interface ppp0
Connect: ppp0 <--> /dev/tts/2
sent [LCP ConfReq id=0x1 <asyncmap 0x20a0000> <magic 0xf88ee422> <pcomp> <accomp>]
sent [LCP ConfReq id=0x1 <asyncmap 0x20a0000> <magic 0xf88ee422> <pcomp> <accomp>]
sent [LCP ConfReq id=0x1 <asyncmap 0x20a0000> <magic 0xf88ee422> <pcomp> <accomp>]
sent [LCP ConfReq id=0x1 <asyncmap 0x20a0000> <magic 0xf88ee422> <pcomp> <accomp>]
sent [LCP ConfReq id=0x1 <asyncmap 0x20a0000> <magic 0xf88ee422> <pcomp> <accomp>]
sent [LCP ConfReq id=0x1 <asyncmap 0x20a0000> <magic 0xf88ee422> <pcomp> <accomp>]
sent [LCP ConfReq id=0x1 <asyncmap 0x20a0000> <magic 0xf88ee422> <pcomp> <accomp>]
sent [LCP ConfReq id=0x1 <asyncmap 0x20a0000> <magic 0xf88ee422> <pcomp> <accomp>]
sent [LCP ConfReq id=0x1 <asyncmap 0x20a0000> <magic 0xf88ee422> <pcomp> <accomp>]
sent [LCP ConfReq id=0x1 <asyncmap 0x20a0000> <magic 0xf88ee422> <pcomp> <accomp>]
LCP: timeout sending Config-Requests
Connection terminated.
Receive serial link is not 8-bit clean:
Problem: all had bit 7 set to 0

我用AT+CGPADDR=1指令查看了运行状态,其实系统是获得了IP地址的.