Can Xbox One pause live TV without a DVR box?
You cannot pause live TV without a DVR or other input that doesn't have the ability to pause live TV. I used to have it set up this way with a cablebox that did not have DVR enabled and I could not pause (fast forward, or rewind). The commands that the OneGuide uses, pass this off to the input device. If the input device doesn't understand this command, it cannot process it.
It can if you use the Xbox One TV Tuner that will be released in Europe in October. It is a USB cable with a DVT-T2/DVB-C tuner on the end that plugs into an OTA aerial with a coaxial socket. The XBO will dedicate 4GB of HDD space for pausing/rewinding live TV but it will not record. It costs 24GBP and will only be usable in territories that use DVB which does not include the US.
www.xbox.com/en-gb/xbox-one/accessories/digital-tv-tuner