Please see below for different options. If the unit was sold initially with version 6.x customer can apply for a credit. If customer has paid for a hardware repair, we will apply the repair cost to either the extended support or the trade in cost. If the upgrade was from 3.x to 6.x or 4.x to 6.x, our sales department will issue a new 5.x upgrade kit. Service Agreement are those purchased through Castelle either direct or through resellers.
Proof of purchase is required.