GPRS拨号发送数据遇到问题了

以下是通信数据 
写:7EFF03C021010100130206000000000305C223050802070266217E 
读:7EFF03C021040100090305C2230547E17E 
写:7EFF03C0210102000E02060000000008020702B60B7E 
读:7EFF03C0210202000E0206000000000802070288887E 
读:7EFF03C021013000130206000000000305C223050702080230FB7E 
写:7EFF03C021023000130206000000000305C2230508020702CB777E 
读:7EC223011800201B3AE123DA5905DE161FDA7B0383A5EDD2F2E18D3F 
DADA818EF50CEB84BC7E 
写:7EC2230218001510F49402DF869793929F134892F02514EA36FF7E 
读:7EC2230318000449A57E 
写:7E8021010300280206002D0F01030600000000810600000000820600 
0000008306000000008406000000004BD97E 
读:7E8021012D0004233F7E 
写:7E8021022D0004EE1A7E 
读:7E8021040300160206002D0F0182060000000084060000000074BC7E 
写:7E802101040016030600000000810600000000830600000000D2A17E 
读:7E80210304001603060A9084C88106D38AC8458306D3670D6594CE7E 
写:7E80210104001603060A9084C88106D38AC8458306D3670D653F947E 
读:7E80210204001603060A9084C88106D38AC8458306D3670D65C9677E 
10.144.132.200 
211.138.200.69 
211.103.13.101 
写:7E2145000021D54800008011DDFE0A9084C8DD061B2623821F90000D 
F16A68656C6C6F61D17E 
写:7E2145000021D54900008011DDFD0A9084C8DD061B2623821F90000D 
F16A68656C6C6F89EC7E 
写:7E2145000021D54A00008011DDFC0A9084C8DD061B2623821F90000D 
F16A68656C6C6FE71F7E 
写:7E2145000021D54B00008011DDFB0A9084C8DD061B2623821F90000D 
F16A68656C6C6F59977E 
写:7E2145000021D54C00008011DDFA0A9084C8DD061B2623821F90000D 
F16A68656C6C6F7C447E 
以上是我的一次通信过程，在获取到IP地址后，发送UDP数据包， 
对方收不到，应该是被丢弃了。 
下面这一串数据是我用windows拨号程序拨号得到的，发送UDP数据是 
成功的，比较一下通信过程， 
windows拨号多了下面这一串数据： 
7E2145000148D5520000801140540A90196FFFFFFFFF0044004301342605 
010806005F935945090000000A90196F0000000000000000000000000053 
450000000000000000000000000000000000000000000000000000000000 
000000000000000000000000000000000000000000000000000000000000 
000000000000000000000000000000000000000000000000000000000000 
000000000000000000000000000000000000000000000000000000000000 
000000000000000000000000000000000000000000000000000000000000 
000000000000000000000000000000000000000000000000000000000000 
000000000000000000000000000000000000000000000000000063825363 
3501083D07080053450000000C0F4342384544444237344437433431393C 
084D53465420352E303706062C2B01F90FFF000000000000000000000000 
0B117E 不理解这一大串数据的含义，在哪个文档可以查到？？ 
还有我上面的通信过程是不是漏了某个步骤？ 
满分求助！