Analog phones

Many VOIP systems (e.g. Asterisk) support ordinary analog telephones. This page is a collection of information about analog phone technology

Phone Circuits

• Bowden's Telephone project circuits
• Directory of links to telephone circuits
• Discover Circuits - Telephone Excellent list of URLs to telephone related circuits.
• Inside the Phone Wiring - explains how phones are wired internally — applies mostly to older analog phones.
• Phrack
• PSTN and POTS fundamentals Training, video/DVD courses, free online tutorials on telephony, digitization, related topics
• Techlib Telephone circuits
• Telephone circuits and projects
• Telephone circuits/projects
• Telephone Projects with circuit diagrams
• Tomi Engdahl designed Telephone Circuits with detailed explanations

Door Phones

This is now on the page Asterisk phone door.

Rotary Dial to DTMF converters

• Addressed on separate page Dial Pulse to Touchtone DTMF Converters

Phone Tools and Equipment

• http://www.cordless4u.com/ - Cordless Telephone line transfer up to 100km
• http://www.jechtech.com/ - Telephone line simulators
• http://www.safetalks.net/ - Telephone scramblers
• http://www.sandman.com/ - Telecom tools and door phones, and more
• http://www.cordless4u.com/ - Long Range phones and Telecom tools

History

• Telephone Tribute extensive collection of historical and technical information on the telephone industry
• Telephones UK

Information

• epanorama Great collection of information on PSTN technology
• Phone systems - A comprehensive guide to phone systems
• PBXMechanic Excellent online collection of telephone manuals, PBX phone guides and PBX programming manuals for free download