| telephone current | Sprechstrom |
| telephone customer | Telefonkunde |
| telephone density | Fernsprechdichte |
| telephone dial | Telefonwählscheibe |
| telephone dialer | Telefonwählgerät |
| telephone directories | Telefonbücher |
| telephone directory | Telefonbuch |
| telephone ear-piece | Telefonmuschel |
| telephone engineer | Telefontechniker |
| telephone engineering | Fernsprechwesen |
| telephone enquiry | telefonische Anfrage |
| telephone equipment | Fernsprechanlage |
| telephone exchange | Zentrale |
| telephone exchanges | Telefonvermittlungen |
| telephone flex | Telefonschnur |
| telephone helpline | Telefonberatung |
| telephone hood | Telefonhaube |
| telephone hotline | Telefon-Hotline |
| telephone indicator | Telefonlampe |
| telephone information | telefonische Auskunft |
| telephone information service | Fernsprechansagedienst |
| telephone inquiry | telefonische Anfrage |
| telephone installation | Fernsprechanlage |
| telephone installations | Fernsprechanlagen |
| telephone installator | Sprechstelleneinrichter |
| telephone instrument | Fernsprechapparat |
| telephone interference | Telefonstörung |
| telephone interference factor | Fernsprechformfaktor |
| telephone interpreter | Telefondolmetscher |
| telephone interpreting | Telefondolmetschen |
| telephone interviewing | telefonische Befragung |
| telephone jack | TAE-Stecker |
| telephone jacket | Telefonsteckdose |
| telephone joker | Telefon-Joker |
| telephone junction box | Telefonverteiler |
| telephone keyboard | Fernsprechertastatur |
| telephone keypad | Fernsprechertastatur |
| telephone kiosk | Telefonzelle |
| telephone line | Fernsprechleitung |
