Broadband consists of a modem or a router (small black box) for your computer and a line splitter or filter. Broadband-enabled exchanges pump telephone calls and data down your house line into TWO INDEPENDENT CHANNELS. You can then use the computer on-line and have a telephone conversation at the same time. These days most people have some form of "Fibre" connection to the exchange. Slowly, the country is converting over to "Full Fibre" (aka FTTP) which is a fibre cable to your house or flat. However for those "in the sticks" Wireless Broadband, Satellite Broadband and the new 5G Mobile connections maybe available.
There are many “packages” available so do ask for free advice as part of the annual contract . It may be prudent to install a “wireless” Broadband router, which removes the need to rewire the telephone junctions. With Broadband a good virus checker must be installed with an active firewall. All this is explained at the point of installation by sambucus.net. This service package is now comparatively cheap with all telephone calls, line rental and Broadband charges working out at c. £35 per month.
Once you have installed Broadband, sambucus.net can install SKYPE, Whatsapp (or similar) allowing you to make FREE telephone/video calls to other users. You can also dial normal landline phones for a reduced rate currently of 1.7p per minute to virtually most countries in the world including the UK.