Chapter 1. An Introduction to Telephony and Asterisk

Telephone, n. An invention of the devil which abrogates some of the advantages of making a disagreeable person keep his distance. —Ambrose Bierce.

What is a telephone? While Ambrose Bierce refers to it as an invention of the devil, for most of us a telephone is nothing more than a communication device. For some a telephone is a complex electronic device they cannot live without (have you ever seen a stock broker work?), while for others, it is simply an innovative piece of equipment in their office or home. Telephones exist in many shapes and sizes, but one thing unites them all—their functionality. Be it the most complex phone in the world or the silliest kiddy phone, they essentially enable ...

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