How to establish GPRS connection without fixed and public IP


How to establish GPRS connection without fixed and public IP
In general, the server PC needs a public and fixed IP in TCP/IP mode. But sometime the Client hasn’t public and fixed IP, you know the  public and fixed IP need some money.  So we can use DYNDNS to establish GPRS connection without fixed and public IP. The steps is below:
1, login www.dyndns.com and apply a domain. For terry-test.dyndns-office.com
2,create a account to login
3,active your domain by the web address the dyndns sent to u by email.

4.login http://www.dyndns.com/support/clients/windows.html to download client software and setup on your server PC.

5,fill username and password and select the domain :
6,use another PC to ping terry-test.dyndns-office.com, if ping ok. The dyndns service is ok.

7,if server PC connects with a router, and we need to make port mapping on the router.(NAT)
8,connect pc with IP modem and open configure tool ,firstly we set apn ,password ,username and call center. It’s in other setting tag

9, need to set server center ip and port. IP is domain u applied. And port must be same as server port(for example ,5001) and backup center ip and port is the same as main.
10, need to set dns server ip. You can select one your region’s dns, you can ask service provider.and backup center dns server is the same as main.
11.set work mode for PROT and trigger type for AUTO

13,click reboot enter communication state  

13,run vc_demo on your server PC and set server port; menu->config->service config , set it is the same as configure tool.
14, click start on toolbar.

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