35:33

1900s Antique Telephone Restoration

13:33

Transformando telefones (muito) antigos em um sistema de interfone

17:04

Como fazer cabos de conexão BNC de 50 ohms

9:55

The Great Robot Rescue

13:24

Using old Field Telephones as a wired intercom

12:34

How does telephone ringing work?

18:30

Telefon z tarczą [TOWARY MODNE 24]

14:54

Building a Plain Old Telephone Service (POTS) Intercom