Xbox wont send commands to DirectTV to change channel

These days, stuff does not get hacked easily. Most ways of getting past security these days are based on social engineering (fooling people into giving you what you need for access)

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The Kinect will typically just be listening for commands. Not recording and sending stuff elsewhere. It'll be listening for "XBOX CHANGE CHANNEL TO NBC" and think "94% match to input command "XBOX CHANGE CHANNEL TO NBC" -> Execute that command.

If you cover the IR sensor on the HW180STB the moment after the xbox sends the channel number (e.g. 5-1) then the xbox successfully will change the channel. The April update must have included that extra "enter" command which has now ruined the channel
changing function. You can still change the channel if you use the up and down arrows on the right side of the xbox remote since that is only a "Channel Up" or "Channel Down" function.

On OneGuide you must select select the active show within the channel for it to work, clicking on the actual channel does nothing.

When saying a channel command, for example 'Xbox Watch HBO', do you get the prompt in the top right which shows said command where the xbox is trying to send the command?

You could also try using the up/down D-Pad buttons on the contoller (this sends a signal to the set-top box for channel up/down). If that doesn't work then the set-top is likely not recieving these commands correctly.

I am from Russia. I recently bought a Xbox One. It works fine and understands my voice commands in English.

In Xbox One (OneGuide) no support for Russian cable television providers. And no voice commands to change channels.

I'd like to have voice commands: NEXT CHANNEL, PREVIOUS CHANNEL and CHANNEL [NUMBER CHANNEL].

It doesn't work properly. The Xbox sends extra commands after channel changes that causes problems with Cox making it basically unuseable without having your remote which kills the whole point of the Xbox one.