by Arlington
hs3730 wrote:Amtrak dining (and cafe) cars, unlike fixed restaurants, have an issue to contend with: spotty cell network service. A restaurant PoS unit will instantly be able to return whether a card is valid. On board a train, if you're in a tunnel, mountains, or what seemed like the entire state of New Mexico, there might not be a way to connect to a network and immediately validate a card. Or worse, like Mr Norman's two beverages, legitimate charges that get lost in the shuffle.And yet the airlines went no-cash/card-only long before they had reliable internet onboard. Card numbers themselves can be validated without a connection using a mathematical formula (Luhn Formula). This is separate from the question of whether there's an account behind the number that will ultimately make good, but apparently despite these constraints, handling cash was so painful that the airlines preferred to turn away cash and buffer card purchases in flight and batch-process them on the ground or at the end of the shift, just like Amtrak would/should.
"Trying to solve congestion by making roadways wider is like trying to solve obesity by buying bigger pants."--Charles Marohn