Now our device only support below 3G and WIFI modules: 

Huawei 3G USB module :

CDMA2000:EC1261/EC1262

WCDMA: E176G

TDS-CDMA：ET128

Ralink WIFI USB module :

RT2571 RT3070

WIFI Step:

1. Plug Ralink WIFI module to DVR USB port.

2. Go to MainMenu->System->NetService->WIFI,click "Search",see below pic:

3. Choose your WIFI network, for example DVRSE-tplink, then set WIFI IP address,see below pic:

Pls note,WIFI IP address shoule be different with DVR IP address. 

4. Use IE or CMS to visit WIFI IP address 192.168.1.11

3G Step

1. Plug 3G USB modem to the DVR USB port

2. Go to MainMenu->System->NetService->Wireless Config,see below pic

2. Choose correct 3G network and fill access point,dial number,user name and password,for example Huawei E176G 3G USB modem,then click "OK",see below pic.

3. Restart.

4. After restart,then go to MainMenu->System->NetService->Wireless Config,then it will appear 3G IP address(172.18.234.62),see below pic

5. At last,just use IE or CMS to visit the 3G IP address,172.18.234.62