How the Telephone Works
Movie| Title | How the Telephone Works |
| User score | 0 |
| Release date | Jun 15, 1938 |
| Genre | Documentary |
| Director | J.D. Chambers , Ralph Elton |
| Production country | United Kingdom |
| Production companies | GPO (General Post Office) Film Unit |
| Run time | 7 min. |
Experimental animation produced by GPO to explain telephone systems to the public.