Telephony

Articles

• http://www.epanorama.net/circuits/teleinterface.html
• http://www.telos-systems.com/techtalk/3-10.pdf
• http://nbtsc.org/~erek/optimumhybdesign.pdf
• http://affon.narod.ru/Phoneline/Telephoneint.pdf
• http://www.telos-systems.com/techtalk/telephone_qa.pdf
• http://massis.lcs.mit.edu/telecom-archives/archives/technical/phone.patches
• http://writersworld4all.com/b2/index.php/glenn-raymond-ham-radio-and-electronics/a-phone-patch-for-ham
• http://free-electronic-circuit.blogspot.com/2008/07/telephone-hybrid-circuit.html
• http://inventgineering.com/Telephony.htm
• http://broadcastengineering.com/audio/telephone_hybrids_audio_801/
• http://www.edaboard.com/thread8546.html
• http://www.ipass.net/teara/brew.html
• http://communication.howstuffworks.com/ip-telephony10.htm
• http://electrosofts.com/dtmf/index.html

Books

• Telephone Projects for the Evil Genius

VOIP

• http://www.voip-info.org/

Software

• http://www.asterisk.org/
• http://www.gnu.org/s/bayonne/

Components

• http://search.digikey.com/us/en/products/CPC5622ATR/CLA322CT-ND/2207461
• http://www.onlinecomponents.com/clare_cyg2011.html?p=12693569
• http://arduino.cc/forum/index.php/topic,2984.0.html
• http://www.intersil.com/data/an/an549.pdf
• http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=MC33215
• http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=TCA3388&fsrch=1
• http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=MC34114&fsrch=1
• http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=68HC705F32&fsrch=1&sr=20
• http://www.futurlec.com/Motorola/MC34114pr.shtml
• http://www.futurlec.com/Others/MC34014pr.shtml
• http://www.futurlec.com/Others/MC34017pr.shtml