Originally Posted by the_traveler
I can not say for certain, but I believe with an all-reserved train, you can only ride on that specific train, without a new ticket for the new train.
I had an experience where I had a res on a 9 AM train that allowed only a 45 minute connection. I wanted to get on the 7 AM train, but they said that I would need a new ticket for the 7 AM train. But to get the new ticket, I would have to pay the 10% penalty also!
I chose to remain on the 9 AM train. Luckily, it was on time!
My experience has been that they will do an even exchange at the ticket window without any penalty. The penalty applies only if you do not cancel 1 hour before the scheduled train.