The Outernet is the only long-range communications system over the Long Earth. It's a mixture of internet and drop-boxes mediated by the chance passage of travellers or twains.[1]

On each world an airship goes through, it downloads rapid update packets to local nodes to be spread across that world and uploads any ongoing messages and mail.

When two airships meet, they hold a 'gam' where they swap news and correspondence.

It's reliable but slow and not secure, and doesn't function at all far away from the Datum.[2]


  1. The Long War - Chapter 3
  2. The Long Mars - Chapter 6
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