The Korea Tourism Organization's accessible travel information describes Korail's One-Call preferential booking for passengers aged 65 or over, disabled passengers and qualifying disabled veterans. It lists priority call-center connection via 1544-7788 or 1544-8545, payment and ticket issuance by telephone, and a payment deadline deferred until 20 minutes before train departure. This is not a guarantee that a call will connect or boarding can begin 20 minutes before departure. Confirm current eligibility, accessible seating, discount rules and operational conditions directly with Korail.