The TS3 does not have built-in networking. Only USB or RS-232.
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This is the most common method. The receiver will read the software file from a USB drive. The TS3 does not have built-in networking
Major software upgrades can reset user data. Go to Menu > Installation > Satellite Setup and perform a fresh blind scan to restore your channel list. select the file
Plug the drive into the receiver, navigate to Settings > System > Software Update , select the file, and wait for the process to complete.