The difference between IPTV box and OTT box

Ott:over the top, providing users with a variety of application services via the Internet

Iptv:internet protocol Television, Internet Protocol TV

Technical differences:

Ott is the public network, that is, through the IP network to connect to the Internet, and your computer online is the same net. IPTV is the private network, but also through the IP network, but not connected to the Internet, directly pointing to the IPTV platform, the image point is IPTV itself formed a LAN.
Ott goes the public network, so it is more open and free than IPTV.
IPTV is a private network, so it is more secure than OTT to watch the quality and stability of the program.

The difference in policy:
Currently, the State stipulates that there can be no live broadcast on OTT, while IPTV may live.