How telephone network works ( 18 ) :

• Disassembly Of A Touch-tone Phone - what is inside modern telephone   
• How Cordless Telephones Work - A cordless telephone is basically a combination telephone and radio transmitter/receiver. This document tells how they work.   
• How telephone recording adapters work   
• Loop current technical bulletin - what are the problems when the loop current is too low or high   
• Phone line audio characteristics - article from Radio Guide Magazine     
• Phone Line Basics Engineering Notes - every audio engineer has had to deal with telephone lines at one time or another   
• Phone System Tutorial I - read also   
• RJ11C - RJ11W pinouts - pinout of most commonly used telephone connectors (most common in walls in USA and equipment worldwide)   
• Telephone line audio interface circuits - telephone hybrid circuits described and more   
• Tips for Correcting Bad Phone Lines   
• Understanding telephones - technical introduction to how telephones work   

Do it yourself telephone installations

• Adding a Jack to an Existing Phone Line - step by step instructions for wiring used in USA   
• Adding a Second Line to Your Existing Phone Jacks - for wiring used in USA   
• An Introduction to Providing Your Own Telephone Wiring   
• Phone Man's Advice for Wiring Your Home Phone Lines   
• JACKS and PLUGS - Universal Service Order Codes to identify tariffed services and equipment   
• Phone Man's Advice for Wiring Your Home Phone Lines   
• What do all the wire colors mean?   

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