Coaxial RF Cable: A coaxial RF cable transfers both audio and video on a single cable.
Optical (or Digital) Audio Cable: An optical (or digital) audio cable transfers audio only. This cable transfers audio at the highest possible quality from your DIRECTV DVR to an A/V receiver. If you have a home theater, own an A/V receiver capable of receiving Dolby Digital audio, and wish to use Dolby Digital audio, then you must use this cable. Not all A/V receivers with optical audio inputs are capable of receiving Dolby Digital audio. An optical audio cable is not included with the DVR.
BNC Cable: A BNC Cable is similar to a coaxial RF cable and transfers both audio and video. This type of cable is not included with your DVR. However, you may already be using a BNC cable in an existing connection to your TV. If so, you can purchase an adapter that will allow you to connect BNC cables to the RF In or RF Out jacks on your DVR.
Telephone Line Splitter: The included telephone line splitter allows you to plug both a telephone and your DVR into a single telephone wall jack.
Video, Audio, and Electronics Equipment and Terms
Switch Box: A switch box is a small box that allows you to connect multiple devices to your TV, even if your TV does not have enough input jacks to connect them all directly. It allows you to switch easily between viewing DIRECTV channels, viewing video from your DVD player, or running your game system. Switch boxes are inexpensive and can be purchased at electronics stores.
A/V Receiver: An A/V receiver is similar to a switch box but is more sophisticated. It may offer additional features such as remote control or Dolby Digital audio capabilities. An A/V receiver allows you to connect multiple devices to your TV, even if your TV does not have enough input jacks to connect them all directly. It allows you to switch easily
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