Grantees shall have customer service center and bill payment locations open at least during Normal Business Hours. Grantees shall locate customer service center and bill payment offices at locations that are convenient to subscribers and the public. Grantee customer service centers must be adequately staffed and able to respond to subscribers and the public not less than 50 hours per week, with a minimum of nine hours per day on weekdays and five hours on weekends excluding legal holidays. As used herein, "adequately staffed" means customer service representatives are available to respond to customers who come to the service center in at least the following ways:
A. To accept payments;
B. To exchange or accept returned converters or other company equipment;
C. To respond to inquiries; and
D. To schedule and conduct service or repair calls.