I tried something after getting an idea while I was adding some more IP channels to my box. It is not TV, but may be of interest to some.
I managed to add audio feeds from my local law enforcement, fire, EMS, etc. I found the stream urls on broadcastify and entered them through dreambox edit same as the TV channels. The box plays them just like any other radio service, although when tuning to one it will usually play a short, 15ish seconds, ad before playing the actual feed.
It may not be of a lot of use when someone has a local emergency, especially if power and internet are out, but it could be interesting to listen to the radio traffic when there are major events going on elsewhere in the country. Anyhow just thought I'd share in case anyone else would find it interesting.