What is a BellSouth Internet Service dial-up account and why would I need one?

BellSouth® FastAccess DSL Service also includes access to a backup BellSouth Internet Service dial-up account. This account may be used while you are traveling or if FastAccess DSL is temporarily interrupted. The backup dial account provides for 20 hours of usage per month at no additional cost to you. (You will be responsible for any long distance or roaming charges that may be incurred for all back-up dial usage.)

If you use our backup dial account for more than 20 hours in any month, you agree to pay BellSouth $2.00 for the first hour or fraction thereof in excess of 20 hours and $1.00 per hour for each additional hour or fraction thereof in excess of 21 hours. Billing for usage over 20 hours will not exceed $19.95.