Your business will need at least one telephone line to allow entrants to contact you and for you to be able to contact suppliers. You may also decide that you need a fax machine for people to return completed entry forms and so on. The telephone company will bill you every month or quarter for the calls you have made, often plus an amount for the line rental for the next quarter. As you are likely to often be away from your home telephone, it is a good idea to use mobile phones as well as (possibly even instead of) your landline.
It will be very useful to have fast internet access and an email address, and a website of your own is probably the best way to advertise your business. You may even design it so that it accepts online entries, including payment. Many different internet service providers (ISPs) offer web hosting, internet connections, email accounts and related services. Shop around to find out what the best deals for you would be.
Various packages and discount structures are available to business users, which can help to reduce telecommunications costs. Contact your telephone company's customer services department for details.