Your business will need at least one telephone line to contact suppliers and handle general enquiries. It's important for most businesses to have fast internet access and an email address and you may also decide to have your own website and social media accounts - these can be very cost-effective ways of promoting your business to prospective clients.
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.
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.
You may decide that you need mobile phones as well as land lines. (If your alarm fitting business is mobile, you may decide to use only mobile phones and not have a land line at all.) Again, there are many different deals available offering different options and payment plans to the user.
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.