Comment EDI VAN charges ~$0.50 per KC (1000 characters) (Score 1) 168
Back when EDI (Electronic data interchange) was new it was often described as each transaction costing "similar to a long distance fax" back in the days when long distance was expensive. Was about $1.50 per transaction.
They measure the data in KC (kilo characters). Typical pricing back when it was popular was $0.50 per KC in early 90's plus many other fees. (could have been more when it first came out)
For a small company you would make a dialup connection to a VAN (Value Added Network) to submit a transaction and check for new transaction responses. Larger companies would have a permanent X25 network connection to the VAN which would have it's own monthly connection fees and data fees but was faster and near instant. There are still legacy users of these EDI VAN networks who have not shifted to the Internet versions of the EDI standards. Hopefully they renegotiated their rates at some point and didn't just let their contract auto-renew all these years.
SMS is easily the most expensive current communication on a per MB basis in common use today and it gets more expensive as providers tend to increase the rates on SMS and not lower them. $0.25 per message domestic, $0.60 per roaming message on Telus.