Your CapTel 2400i works like any other phone – just pick up the handset and dial the person you want to call on the dialing keypad. Every time you make a call, the phone can also connect over the Internet to a free Captioning Service. An operator (Captioning Assistant) at the Captioning Service uses speech-recognition technology to create captions of everything your caller says. The captions appear on your CapTel 2400i display screen for you to read.