Voice over IP is a hot technology. Staying up on the latest Voice over IP technology can be difficult. The content below is a good reference guide covering all things related to Voice Over IP including Voice over IP news, articles, references, FAQs, and more. It should be a great starting point to to learn all about Voice over IP.

Voice over IP Recent News

Voice Over IP

• Voice Over IP Books
• Voice Over IP Organizations
• Voice Over IP Conferences
• Voice Over IP News
• Voice Over IP Glossary
• Voice Over IP Whitepapers
• Voice Over IP Articles
• Voice Over IP Testing Tools
• Voice Over IP Related IETF Working Groups
• Telephony Related Working groups
• Voice Over IP Quality of Service Working Groups
• Voice Over IP Standards
• Voice Over IP Web Pages
• Internet RFCs related to Voice Over IP
• Internet Drafts related to Voice Over IP
• For related topics see:
• Voice Over IP Gateway and Softswitch Vendors
• Voice Over IP Service Providers

Voice Over IP Books

• Amazon VoIP Books
• SIP: Understanding the Session Initiation Protocol, Second Edition by Alan Johnston
• SIP Demystified by Gonzalo Camarillo
• VoIP Telephony with Asterisk by Paul Mahler
  
• Carrier Grade Voice Over IP
by Daniel Collins
• Rich Tehrani's IP Telephony Dictionary
• VoIP Fundamentals by Jonathan Davidson
• VoIP Books.com Bookstore

Voice Over IP Organizations

• International Multimedia Teleconferencing Consortium, http://www.imtc.org/
• Enterprise Computer Telephony Forum (ECTF), http://www.ectf.org/
• Cablelabs PacketCable, http://www.packetcable.com/
• MIT Internet Telephony Consortium, http://itel.mit.edu/
• Frequently Asked Questions about the MIT ITC, http://itel.mit.edu/itel/ITC_FAQ/ITC.FAQ.html
• The JAIN APIs (Java technology APIs that enable the rapid development of Java-based next generation communications products and services for the Java platform), http://java.sun.com/products/jain/

Voice Over IP Conferences

• Internet Telephony VoIP Conference
• VoIP Developer Conference

Voice Over IP News

• TMCNet.com - Excellent source of Voice over IP news and articles, http://www.tmcnet.com/
• eWeek's VoIP page - http://www.eweek.com/category2/0,1738,1586434,00.asp
• Tom Keating's VoIP Blog - Covers VoIP news, gadgets, and more, http://blog.tmcnet.com/blog/tom-keating/
• Internet Telephony Magazine - World's First Voice over IP magazine (1996) with VoIP product reviews, articles, news, etc.
• VoIP Newsletters
:
• Voice over IP Developer
• Internet Telephony Magazine
• SIP
• Voice over IP Reseller
• CNet - This Week in VoIP News - http://news.com.com/This+week+in+VoIP+news/2100-7352_3-5450510.html
• TelephonyWorld VoIP news- http://www.telephonyworld.com/von323/von323.htm

Voice over IP Glossary - What is Voice over IP?

• What is Voice over IP? (defined / definitions):
  
  • http://www.intel.com/network/csp/solutions/contact_cntr/6671web.htm
  • http://www.sasktel.com/business_works/ebusiness_solutions/ebusiness_library/internet_glossary.html
  • myphliputil.pearsoncmg.com/student/bp_jessup_ist_1/JessupGlossary.html
  • www.ggrcomms.com/techglos.html
  • http://www.tecksel.com.au/glossary/Default.asp?start=v

Voice Over IP Whitepapers

• Voice Over IP Products, services in a searchable Voice over IP Buyer's Guide.
• Voice Over IP: General
• Voice Over IP: Protocols and Standards
• Voice Over IP: Recording
• Voice Over IP: Challenges
• Voice Over IP: In the Call Center

Voice Over IP Articles

• Finding And Fixing VoIP Problems, Tom Gallatin, Internet Telephony Magazine, May 2003.
• It's Time To Take a Look At SIP, Peter Morrissey, Network Computing, April 17, 2003.
• Measuring Voice Quality in VoIP Networks: Going Beyond "Can You Hear Me Now?", Laura Holly, Internet Telephony Magazine, April 2003.
• VoIP Call Recording Goes Mainstream
• VoIP Regulation: What Lessons Can We Learn From Wireless?
• Popular Telephony P2P Revolutionizes VoIP
• Tom Keating 2005 VoIP Predictions

Voice Over IP Testing Tools

• Voice Over IP Testing Tools in a searchable Voice over IP Buyer's Guide, Internet Telephony Buyer's Guide
• Empirix - Has a comprehensive suite of Voice over IP testing tools
• Radcom - extensive testing tools in Voice over IP, wireless, cellular, ATM, ISDN, and more.

Voice Over IP Related IETF Working Groups

Telephony Related Working Groups

• ETSI (the European Telecommunications Standards Institute), http://www.etsi.org
• Institute of Electrical and Electronics Engineers, Inc. (IEEE, pronounced Eye-triple-E), http://www.ieee.org
• International Telecommunications Union (ITU), a treaty organization of the United Nations with every country as members and the oldest telecommunications standards organization, dating back to 1865, http://www.itu.org
• IP Telephony, http://www.ietf.org/html.charters/iptel-charter.html
• Session Initiation Protocol (SIP), http://www.ietf.org/html.charters/sip-charter.html
• Signaling Transport (sigtran), http://www.ietf.org/html.charters/sigtran-charter.html
• PSTN and Internet Interworking (pint), http://www.ietf.org/html.charters/pint-charter.html
• Telephone Number Mapping (ENUM), http://www.ietf.org/html.charters/enum-charter.html
• Media Gateway Control (megaco), http://www.ietf.org/html.charters/megaco-charter.html
• SIP for Instant Messaging and Presence Leveraging (simple), http://www.ietf.org/html.charters/simple-charter.html
• Instant Messaging and Presence Protocol (impp), http://www.ietf.org/html.charters/impp-charter.html
• Internet Message Access Protocol Extension (imapext), http://www.ietf.org/html.charters/imapext-charter.html
• Internet Fax (fax), http://www.ietf.org/html.charters/fax-charter.html

Quality of Service Working Groups

• Integrated Services (intserv), http://www.ietf.org/html.charters/intserv-charter.html
• Resource Reservation (rsvp), http://www.ietf.org/html.charters/rsvp-charter.html
• Multiprotocol Label Switching (mpls), http://www.ietf.org/html.charters/mpls-charter.html

Voice over IP Standards

• ITU-T H.323, H.320, H.324 , T.120 Standards, http://www.imtc.org/
• H.323 ITU Standards, http://www.imtc.org/h323.htm
• H.324 ITU Standards, http://www.imtc.org/h324.htm

Voice over IP Web Pages

• VoIP Forums - Excellent Voice over IP Forums to learn the latest gossip, trends, tutorials, and get help from fellow Voice over IP forum members.
• An Introduction to IP Telephony , http://www.mockingbirdnetworks.com/pdfs/wp_intro_IPtel.pdf
• Getting Started with SIP API for J2ME (JSR 180), http://developers.sun.com/techtopics/mobility/apis/articles/sip/
• SIP - Open Source, http://www.sipfoundry.org/
• SIP Protocol Explained, http://www.protocols.com/pbook/VoIPFamily.htm#SIP
• SIP - Webopedia / Wiki, http://www.voip-info.org/wiki-SIP
• Fine-Tuning Voice Over Packet Services , http://www.protocols.com/papers/voip2.htm
• H.323 - Webopedia Definition and Links, http://webopedia.internet.com/TERM/H/H_323.html
• H.323 Clients, http://www.openh323.org/h323_clients.html
• H.323 Corner, http://www.meetingbywire.com/netmeetingh323.htm
• H.323 Links, http://www.packetizer.com/h323link.html
• H.323 Protocol, http://www.protocols.com/pbook/h323.htm
• H.323 Video-Conferencing, http://www.h323.org/videoconf.html
• H.323 Standards, http://www.openh323.org/standards.html
• IP Telephony Tutorial, http://www.pt.com/tutorials/iptelephony/
• ITworld.com - VOIP - Internet telephony, Voice Over IP, http://www.itworld.com/Net/3303/
• Internet Telephony Tutorial, http://www.iec.org/tutorials/int_tele/
• JAIN MGCP API Specification, http://jcp.org/aboutJava/communityprocess/first/jsr023/
• MEGACO Specifications, http://www.ncoretech.com/voip/megaco.html
• MGCP - Webopedia Definition and Links, http://webopedia.internet.com/TERM/M/MGCP.html
• MGCP Info Page, http://www.vovida.org/mailman/listinfo/mgcp
• MGCP, Multimedia Gateway Control Protocol, http://www.networksorcery.com/enp/protocol/mgcp.htm
• Megaco, http://www.networksorcery.com/enp/protocol/Megaco.htm
• Motorola VoIP VIPR - Interlink Communication Systems, http://www.interlinkweb.com/~main/motorola-voip-vipr.htm
• Reservation Protocol (RSVP), http://www.isi.edu/rsvp/overview.html
• Real-time Transport Protocol (RTP) News, http://www.cs.columbia.edu/~hgs/rtp/
• SCTP, http://www.sctp.de/ - SCTP is designed to transport PSTN signaling messages over IP networks, but is capable of broader applications.
• SCTP for Beginners, http://tdrwww.exp-math.uni-essen.de/inhalt/forschung/sctp_fb/
• SCTP, Stream Control Transmission Protocol, http://www.networksorcery.com/enp/protocol/sctp.htm
• SS7 Tutorial, http://www.pt.com/tutorials/ss7/
• Signaling System 7 (SS7), http://www.iec.org/online/tutorials/ss7/topic14.html
• The Dawn of the Stupid Network, http://www.isen.com/papers/Dawnstupid.html
• The SIP Center - A comparison between SIP and H.323, http://www.sipcenter.com/aboutsip/siph323.htm
• The SIP Center - The architecture of MGCP /Megaco, http://www.sipcenter.com/aboutsip/siph323/mgcparch.htm
• Understanding the H.323 Standard, http://www.microsoft.com/windows/NetMeeting/Corp/reskit/Chapter11/default.asp
• VNUNET.COM Low-cost voice - over - IP: talk is cheap for the Net, http://www.vnunet.com/Analysis/83784
• Voice over IP Gateway Vendors, http://www.cabledatacomnews.com/iptel/voipgateway.html
• Voice over IP Howto, http://www.linuxdoc.org/HOWTO/VoIP-HOWTO.html
• Voice over IP in the Enterprise, http://www.networkcomputing.com/918/918f1.html
• Voice over IP, http://telecom.about.com/cs/voip/
• Voice - over - IP Mini-HOWTO, http://www.physics.brocku.ca/~edik/Voice-over-IP/
• Voice Over IP (VoIP) Tutorial - Frame Relay Resource Center, http://www.alliancedatacom.com/voice-over-ip-tutorial.htm
• Voice Over IP (VoIP) the Internet Telephony Online Resource., http://www.internet-telephony.org/voice_over_ip/
• Voice Over IP Networks, http://www.anatel.net/whitepapers/WhiteVoiceOIP2.pdf
• Voice over IP Links, http://www.plantronics.com/north_america/en_US/hot_topics/links/links_bluetooth.jhtml#voip
• Voice Over IP Routers for Internet and Intranet Telephony, http://www.mot.com/MIMS/ISG/PressAnnouncements/100197.html
• Voice Technologies for IP and Frame Relay Networks , http://www.alliancedatacom.com/motorola-voip-vofr-white-paper.htm
• Voice and Fax over IP, http://www.iec.org/tutorials/vfoip/
• Voice Over Frame Relay, IP and ATM, http://www.protocols.com/papers/voe.htm
• Voice Over IP Quick Start Guide, http://www.cisco.com/univercd/cc/td/doc/product/access/acs_mod/cis3600/voice/4936vqsg.htm
• Voice Over IP: Title Page, http://www.techguide.com/comm/voiceip.shtml
• Voice Over Packet White Paper, http://www.telogy.com/our_products/golden_gateway/VOPwhite.html
• Voice-over-IP, http://www.lantimes.com/98/98jan/801b022a.html
• Voice/Fax over Frame Relay vs. Voice/Fax over IP , http://www.memotec.com/technology/fripwp.htm

Internet RFCs related to Voice over IP

• E.164 Number Mapping for the Extensible Provisioning Protocol , December 1, 2004
• ENUM Implementation Issues and Experiences, October 24, 2004
• RFC 3261, SIP: Session Initiation Protocol,  June 2002
• RFC 3087, Control of Service Context using SIP Request-URI. B. Campbell, R. Sparks. April 2001. ftp://ftp.isi.edu/in-notes/rfc3087.txt
• RFC 3050, Common Gateway Interface for SIP. J. Lennox, H. Schulzrinne, J. Rosenberg. January 2001. ftp://ftp.isi.edu/in-notes/rfc3050.txt
• RFC 3015, Megaco Protocol 1.0. F. Cuervo, N. Greene, A. Rayhan, C. Huitema, B. Rosen, J. Segers. November 2000. ftp://ftp.isi.edu/in-notes/rfc3015.txt
• RFC 2976, The SIP INFO Method. S. Donovan. October 2000. ftp://ftp.isi.edu/in-notes/rfc2976.txt
• RFC 2974, Session Announcement Protocol. M. Handley, C. Perkins, E. Whelan. October 2000. ftp://ftp.isi.edu/in-notes/rfc2974.txt
• RFC 2897, Proposal for an MGCP Advanced Audio Package. D. Cromwell. August 2000. ftp://ftp.isi.edu/in-notes/rfc2897.txt
• RFC 2871, A Framework for Telephony Routing over IP. J. Rosenberg, H. Schulzrinne. June 2000. ftp://ftp.isi.edu/in-notes/rfc2871.txt
• RFC 2833, RTP Payload for DTMF Digits, Telephony Tones and Telephony Signals. H. Schulzrinne, S. Petrack. May 2000. ftp://ftp.isi.edu/in-notes/rfc2833.txt
• RFC 2806, URLs for Telephone Calls. A. Vaha-Sipila. April 2000. ftp://ftp.isi.edu/in-notes/rfc2806.txt
• RFC 2705, Media Gateway Control Protocol (MGCP) Version 1.0. M. Arango, A. Dugan, I. Elliott, C. Huitema, S. Pickett. October 1999. ftp://ftp.isi.edu/in-notes/rfc2705.txt
• RFC 2543, SIP: Session Initiation Protocol. M. Handley, H. Schulzrinne, E. Schooler, J. Rosenberg. March 1999. ftp://ftp.isi.edu/in-notes/rfc2543.txt
• RFC 2542, Terminology and Goals for Internet Fax. L. Masinter. March 1999. ftp://ftp.isi.edu/in-notes/rfc2542.txt
• RFC 2531, Content Feature Schema for Internet Fax. G. Klyne, L. McIntyre. March 1999. ftp://ftp.isi.edu/in-notes/rfc2531.txt

Internet Drafts related to Voice over IP

• Search for "voice over ip", "SIP", "media", "PSTN", "signaling", or "telephony" at http://search.ietf.org/ or click on the following queries:
• http://search.ietf.org/cgi-bin/htsearch?words=voice+over+ip
• http://search.ietf.org/cgi-bin/htsearch?words=sip
• http://search.ietf.org/cgi-bin/htsearch?words=media
• http://search.ietf.org/cgi-bin/htsearch?words=pstn
• http://search.ietf.org/cgi-bin/htsearch?words=signaling
• http://search.ietf.org/cgi-bin/htsearch?words=telephony

Voice Over IP related:

Voice Over IP Gateway and Softswitch Vendors

• 3Com Corp., http://www.3com.com/
• Audiocodes, http://www.audiocodes.com/
• Cisco Systems Inc., http://www.cisco.com/
• Lucent Technologies Inc., http://www.lucent.com/
• Mitel Corporation, http://www.mitel.com/
• Motorola Inc., http://www.mot.com/
• NACT, http://www.nact.com
• Netrix Corp., http://www.netrix.com/
• Nortel Networks, http://www.nortelnetworks.com/index.html
• RADvision Ltd., http://www.radvision.com/
• Sonus Networks, Inc., http://www.sonusnetworks.com/
• VegaStream, http://www.vegastream.com
• VocalTec Inc., http://www.vocaltec.com/

Voice Over IP Service Providers

• AT&T CallVantage: http://www.usa.att.com/callvantage/
• Broadvox: http://www.broadvox.com/
• Net2Phone: http://www.net2phone.com/
• Packet8: http://www.packet8.com/
• SIPPhone: http://www.SIPPhone.com/
• VoiceGlo: http://www.voiceglo.com/
• Vonage: http://www.vonage.com/