I assume you have already done a proper Forum Search for your model number in case other people have already answered your question ?
If so and that didn't help then check out this thread: https://community.sling.com/message/10363#10363
Come back if it that doesn't help either.
I just got my Slingbox 350 today, and could not find my Cabel TV Top Set Box.
The brand is ADB TNR-2840C - Canal digital call the tuner T-We Box Mini
I could not find the exact model or any other ADB box that could control my TV box.
How could I contact Slingbox to add this model.