The codes and commands used to establish and terminate a phone call over an IP network. The protocol supports such features as conference calling, call waiting and call transfer. The primary IP telephony signaling protocols are H.323, SIP and MGCP/MEGACO. There are also proprietary protocols; for example, Cisco's Skinny is widely used. See IP telephony.
 | Reproduced with permission from Computer Desktop Encyclopedia. Copyright (c) 1981-2009 The Computer Language Company Inc. All rights reserved. |
Additional Resources
- Protecting SIP Proxy Servers From Ringing-Based Denial-of-Service Attacks
- As Internet telephony systems continue to replace existing Public Switched Telephone Network systems, proxy servers running the Session Initiation Protocol SIP will continue to grow in importance for Voiceover-IP deployments that use SIP for call signaling. Since the protection of the global telecommunications infrastructure is critical to people's everyday lives,...
- White papers 2008-09-17
- An Overview of the Cisco Unified IP Phone
- The Cisco Unified IP Phone 7962G and 7942G are full-feature telephones that provide voice communication over an Internet Protocol IP network. The Cisco Unified IP Phone functions much like a digital business phone, allowing one to place and receive phone calls and to access features such as mute, hold, transfer,...
- White papers 2008-08-22
- CIPT2 v6.x/7.x - Implementing Cisco Unified Communications IP Telephony Part 2
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- Training 2008-04-01
- CIPT1 v6.x/7.x - Implementing Cisco Unified Communications IP Telephony Part 1
- View Available Dates and LocationsPrepare to install and configure a Cisco Unified Communications Manager CUCM solution in a single site in this course, focusing primarily on CUCM Release 6.x/7.x, the call routing and signaling component for the Cisco Unified Communications solution. In lab activities, you will perform post-installation tasks,...
- Training 2008-04-01
- ISDN Q-Interface Signaling Protocol Q.931 Tunneling Over the IP Network: Reduce the Cost of Private Telephony Networks
- Private Branch eXchanges PBXs are crucial communication components in any organization. As an organization grows and expands to multiple locations, it needs to establish multiple PBXs to keep the locations connected. The primary challenge in operating these multiple PBXs is to get them to work as a single entity so...
- White papers 2008-04-01
- Voice over IP Security
- View Available Dates and Locations Voice over IP VoIP systems are vulnerable to the same threats as data networks, including viruses, theft, spam, fraud, privacy invasion, and denial of service attacks. In Voice over IP Security, you'll learn to counter those threats and attacks. You...
- Training 2008-01-01
- Understanding Voice over IP Signaling Protocols in Cisco Telephony Implementations
- Understand the specific functions Voice over Internet Protocol VoIP signaling protocols perform and how this information will help you design, build, maintain, and troubleshoot a Cisco VoIP implementation.
- White papers 2007-04-04
- Investigate and implement Session Initiation Protocol (SIP) gateways
- As deployments of voice over IP VoIP networks continue at a rapid pace, network professionals need to understand the real-world implementation issues surrounding voice gateways, which handle the many tasks involved in translating between transmission formats and protocols and act as the interface between an IP telephony network and the...
- Book chapters 2006-08-31
- The great open source VoIP debate
- Two weeks ago at the Internet Telephony Conference & Expo in Miami, I had the pleasure of moderating the open source and telephony roundtable discussion with some of the key players in the business. The panel included Mark Spencer, creator of Asterisk and CEO of Digium; Bill Rich, CEO of...
- Blog posts 2005-03-09
- VoIP and open source, the next great frontier
- As the commoditization and open sourcing of operating systems and applications continue to disrupt the software companies, telephony vendors have so far enjoyed a relative calm in the closed and proprietary phone systems market with substantial profit margins. That could now all be turned on its head with the proliferation...
- Blog posts 2005-01-10
- Motorola's got their Ojo video phone working
- Video telephony is a big subject of discussion at the Consumer Electronics Show. True, CES showcases products aimed mainly at consumers, a new video phone is being shown at the event that blurs the lines somewhat between the enterprise and consumer IP telephony sectors.How about a mass-market video phone that...
- Blog posts 2005-01-07
- VoIP security: knowing your ALGs and H.323s
- Whether it's for firewalls or Virtual Private Networks, we're seeing an increasing emphasis on VoIP Security.The point was hammered home today by a look at the Security Appliances winner in Information Security magazine's 2004 Products of the Year awards.The triumphant solution is actually two related products: Juniper Networks' NetScreen-5GT and...
- Blog posts 2004-12-16
- Patent watch: a way for cops to intercept VoIP calls
- Yesterday, I posted descriptions of three VoIP related U.S. patent applications published in the last three months.There are a total of nine. I promised you three more. Here they are:Stealth interception of calls within a VoIP network:Folks, this is a real biggie.You are not a bad person, but bad people...
- Blog posts 2004-12-08
- Exclusive: I visit the patent office and dig out the newest VoIP patent applications
- Long before the pitches to potential partners, long before the press releases and marketing campaigns, innovators in the IP telephony space are likely to apply for a patent. The interval between patent application and approval can exceed two years. With that fact in mind, I thought I would get the...
- Blog posts 2004-12-07
- Communication breakdown threatens VoIP
- Communication breakdown threatens VoIPVoIP inter-connectivityInter-connectivity is only a problem If you dont know what you are doing.I suggest that Companies being talked into partly proprietory solutionsSuch as Cisco or the spin-offs of Clarent and the list goes on,are going to have connectivity problems.Those companies are trying to sell only their...
- Discussion threads 2003-12-29
Neighboring Terms
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