About the article

Flash key add-on for telephone sets

Flash key add-on for telephone sets
Although most modern telephones, in particular, those with a number memory, already have a flash key, there are many excellent sets around which have not. This circuit makes these older sets compatible with a domestic telephone exchange which requires a flash key on each extension.
Downloading of this magazine article is reserved for Elektor Members only.
Already a member? click here to log in.
Loading comments...