The strange technology of Snowpiercer

I just started binging the show, I'm currently on S2 and am confused about the technology available (and unavailable) on the train.

I assume Snowpiercer takes place sometime in the near future, and there is clearly advanced tech available, computers and the train status is networked to the bridge. What confuses me the most is that on such a long train there doesn't seem to be any networked communication- no video, no voice, no text, just hardwired phones. There are no databases of any kind, no digital media, nothing. Yet they can send up weather balloons and send video to the lounge?

I'm confused.