Encyclopedia > H > Heat coil
Heat coil
Heat coils, also known as protectors, bugs or carbons serve as a protector between the telephone exchange and outside plant. They are commonly the last point of appearance for a telephone circuit before it leaves the office.
Information are taken from Wikipedia, the open encyclopedia, to which contribute many volunteers from around the whole world. Texts are available under the following conditions GNU Free Documentation License.
Encyklopedie (cz) Encyklopédia (sk) Enzyklopädie (de)