some isp provided this service along with internet service. so, anyone that subscribed to iptv-internet service will be able to use it. it only can be supported by limited device eg:rt-n56u and several others. if u dont have it provided by your isp, the feature is useless(in my understanding). the iptv service and internet are two saperate traffic, so your internet will be limited to whatever u subbed to. In my place for example, the internet will be around 20mbps and wont be affected by the iptv when u are watching it. and the iptv itself has to work with a set top box provided by your the isp.