Just a quick note on the URLs for doing this (File -> Open Network…);
Channel playlist:
http://<TV Headend IP>:9981/playlist/channels http://<username>:<password>@<TV Headend IP>:9981/playlist/channels
Channel Number:
http://<TV Headend IP>:9981/stream/channelid/<channel number> http://<username>:<password>@<TV Headend IP>:9981/stream/channelid/<channel number>
