• How can MPLS help in VoIP implementation between a parent comp...

    Find out how MPLS helps in VoIP implementation between a parent company and its branch offices.

  • HD voice: Listen and believe

    As high-definition phones become more prevalent in the catalogs of enterprise phone manufacturers, HD voice adoption is becoming inevitable. Enterprises are quickly hearing the value, and the price...

  • G.729

    G.729 is a standard for Internet Protocol (IP) private branch exchange (PBX) vendors, as well as for the public switched telephone network (PSTN)... (Continued)

  • G.711

    G.711 is the default pulse code modulation (PCM) standard for Internet Protocol (IP) private branch exchange (PBX) vendors, as well as for the public switched telephone network (PSTN).

VoIP Protocols

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  • SIP tutorial

    Session Initiation Protocol (SIP) is becoming the signalling protocol of choice in the IP telephony, VoIP and unified communications (UC) industries. This comprehensive tutorial details the ins and outs of basic SIP operation, security, troubleshooti... 

  • Springer Handbook of Speech Processing

    The Springer Handbook of Speech Processing is widely regarded as a must-read for all telecom professionals. This chapter focuses on how businesses can implement a VoIP system that exceeds expectations and far surpasses the traditional PSTN. 

  • SIP fundamentals

    Session Initiation Protocol (SIP) will allow true interoperability, eventually enabling every IP-based device and application to communicate seamlessly with one another. This guide discusses some of the basics of SIP, including vulnerabilities, testi... 

  • Learning guide: VoIP protocols and standards

    The Israelis are credited with placing the first computer-to-computer call in 1995. Though the audio quality was poor and likened to the "voice sounds" that were transmitted during the first historical call made in 1875 by Alexander Graham Bell, this... 

  • How does VoIP work? A technical guide to functional VoIP

    By now, you probably have a general idea of what VoIP is, but do you understand how it works? Do you know how many bits are in a conventional PCM voice sample or what "look-ahead" is used for? Do you know which two modes a caller can use to set up a ... 

  • VoIP Learning Guide

    This guide explains what VoIP is, how it's used, and how it fits into the enterprise. Check back often for updates and new additions. 

  • Coverage of VoiceCon 2005

    SearchEnterpriseVoice.com recently traveled to Florida to provide you with in-depth coverage of VoiceCon 2005. Check out our extensive coverage. 

  • Microsoft's Real-Time Codec (RTC) for VoIP optimization

    Microsoft's Real-Time Codec (RTC) delivers VoIP and unified communications services (UC) that are optimized in real time for available bandwidth. 

  • SIP school: A to Z on SIP

    Whether you're an end user or an IP network engineer, this primer will help you clear a strategic path to SIP. You'll uncover some of the relevant services and solutions that SIP can provide for the enterprise. Additionally, you'll learn what IT staf... 

  • Interconnecting MPLS clouds

    Take a look at the shortcomings of MPLS across service provider networks to learn about interconnected MPLS clouds. 

  • Understanding certifications and technical interviewing

    In today's world of increasing technology and vendor certifications, how do you determine if someone is a paper professional? This column shows you what you need to know. 

  • How to use fuzzing to deter VoIP protocol attacks

    Lisa Phifer explains how functional protocol testing, also known as "black-box testing" or "fuzzing," can help you reduce the inherent risk posed by SIP and H.323 protocols. 

  • VoIP protocol insecurity

    Like many Internet protocols, SIP was designed with simplicity, not security, in mind. And, although H.323 was created to meet broader goals, security issues have plagued it as well. Expert Lisa Phifer examines some of the vulnerabilities in this tip... 

  • SIP interoperability and testing

    Session Initiation Protocol (SIP) is a signaling protocol typically used for telephony, instant messaging and Internet conferencing. This article discusses the interoperability and testing being done to support this protocol. 

  • SIP paving the way for real-time media

    IETF developed SIP, the text-based protocol, specifically to address distributed applications of the IP world. SearchEnterpriseVoice.com expert, Sanjeev Sawai, explains why SIP will be the catalyst for application-level innovation in the near future.... 

  • CDP and multi-vendor networks don't mix

    Cisco switches and CDP go hand-in-hand, but when non-Cisco switches and CDP meet, interesting things happen. 

  • Expectations of E911

    E911 regulations are on the way. And while the issue is more pressing for general consumer VoIP services, until the technology catches up, corporations need to limit their liability with regard to 911 calls. 

  • See more Tips on VoIP Protocols
  • G.729

    G.729 is a standard for Internet Protocol (IP) private branch exchange (PBX) vendors, as well as for the public switched telephone network (PSTN)... (Continued) 

  • G.711

    G.711 is the default pulse code modulation (PCM) standard for Internet Protocol (IP) private branch exchange (PBX) vendors, as well as for the public switched telephone network (PSTN). 

  • VoIP (voice over IP)

    VoIP (voice over IP) is an IP telephony term for a set of facilities used to manage the delivery of voice information over the Internet. (Continued...) 

  • What is a VoIP media gateway?

    In this Whatis.com podcast, learn about the four protocols that keep VoIP working -- H.323, SIP, MGCP and MEGACO. 

About VoIP Protocols

Knowledge of VoIP protocols is important to ensure that your IP telephony and unified communications applications work together seamlessly. Find resources on SIP (Session Initiation Protocol) and H.323 and learn how the protocols affect a system's function and potential.