# CDMA/GPRS

<img src="/images/old/Image_722.jpg">

Please refer to the following sheet for detailed information.

* __WLAN type__
    Here you can select 3G network type to distinguish the 3G module from different ISP.
    The types include WCDMA， CDMA1x and etc.
* __APN/Dial No.__
    Here is the important parameter of PPP.
* __Authorization__
    It includes PAP,CHAP,NO_AUTH.
* __Pulse interval__
    It is to set time to end 3G connection after you close extra stream monitor.
    For example, if you input 60 here,
    system ends 3G connection after you close extra stream monitor 60 seconds.
    * If the pulse interval is 0,
        then system does not end 3G connection after you close the extra stream monitor.
    * Pulse interval here is for extra stream only.
        This item is null if you are using main stream to monitor.