Full access to functions without using remote?

Not that I've seen

There's some indication that they exist, but I have no idea where they can be found.
Tunbow Electronics E60010
AVION ATB 7707
MAG CCB7707
The extra buttons are Vol+/- and menu.

I've not seen one single unit that added the extra expense of a full keypad on the base unit. This makes sense (unfortunately) being that the concept is to make the least expensive box they can (Hence no RF MTS...Etc.).

I suggest getting a compatible universal or learning remote soon - don't wait until the original remote is lost or breaks. You may need to program in one or more functions using the original remote.

At least, this way, you'll have a backup remote and won't be dead in the water one one fails.

I've been happy with the price vs. compatibility of the GE 5 device learning remote (got mine at Target). I've been able to use it with both DS and Zenith CECBs.

The Digital Stream DTX9950 and DTX9900 have a few more TV functions on their remote: TV volume up and down (separate from the box's volume up/down controls) and TV input selection.