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what is a pbx how to used

hi guys i'm intresting in learning about pbx how they work , where to buy it how to install it  can anybody tell which are the new pbx system for small buisness home use can i build my own  wel  guys thank you for the help  
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smurfdesign
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smurfdesign
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Joel_SiskoCommented:
By a simple definition a PBX (Private Branch Exchange) is a system that allows multiple users access to a shared number of resources connected to the phone company.

For an open source PBX you can look at http://www.asterisk.org/

Here are a few general links:

http://www.voip-info.org/tiki-index.php
http://www.iptelephony.org/

Some areas of study include:

IVR, Voice Mail, TTS, ASR, structured cabling ,BICSI, RCDD, FCC site, CALEA, 1996 Telecommunications ACT

Some books to study:

Newtons Telecom Dictionary, by Harry Newton

Guide to T-1 Networking: How to Buy, Install & Use T-1 From Desktop to Ds-3
by William A. Flangan


Here is a list of links to keep you busy this weekend:

http://www.protocols.com/pbook/VoIP.htm
http://www.protocols.com/pbook/VoIPFamily.htm    basic overview of VoIP

http://www.cisco.com/warp/public/788/signalling/net_signal_control.html      basic telecom link

http://www.cisco.com/en/US/products/sw/voicesw/ps556/products_tech_note09186a0080174804.shtml    debug sample

http://www.cisco.com/application/pdf/en/us/guest/products/ps5037/c2001/ccmigration_09186a008011bd39.pdf   all of IOS voice commands

MGCP rfc's below

http://www.faqs.org/rfcs/rfc2705.html
http://www.faqs.org/rfcs/rfc3525.html
http://www.faqs.org/rfcs/rfc3660.html
http://www.faqs.org/rfcs/rfc3661.html 

SIP RFC's

http://www.ietf.org/rfc/rfc3261.txt
http://www.ietf.org/rfc/rfc3311.txt
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