Your practice will need at least one telephone line to communicate with clients, contact consultants and so on. You may also need a fax machine. Fast internet access and an email adddress are probably essential. A website would be a good way to advertise your practice and promote your services.
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 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.
It is likely that you and your architectural staff will need mobile phones as well as land lines. There are many different deals available offering different options and payment plans.