Telephone

A telephone was a communications device used on Earth. It was invented by Alexander Graham Bell. (TV: Father's Day)

In 1941, the Empty Child was able to Om-Com with the TARDIS' police box phone. (TV: The Empty Child)

The miniaturised First Doctor and his companions tried to use Forester's telephone to alert someone to the dangers of DN6, but could not make themselves heard. However, this raised the suspicions of telephone operator Hilda Rowse enough to send her police constable husband Bert to investigate. (TV: Planet of Giants)

In 1968 the Sentience cut off all phone lines from Crook Marsham. (PROSE: Nightshade)

fitted a extra-long phone cable to the Third Doctor's phone in his UNIT lab with the intention of using it (and the Nestene Consciousness' affinity with plastic) to kill the Doctor. (TV: Terror of the Autons)

Vardans were able to transmit themselves down telephone wires. (PROSE: Return of the Living Dad)

The Doctor's TARDIS contained a telephone set capable of receiving calls from across time and space. (TV: The Beast Below, The Big Bang)

More specific types of telephone included:
 * the mobile phone
 * the superphone
 * the smart phone
 * the police box