VoIP models and services: Complete guide
With clear, concise explanations of existing VoIP business models and deployment methodologies, this guide will enable you to weigh the pros and cons of each based on your needs.
Learning Guide: How is transmitting voice different from sending data
Learn the differences between voice transmission and sending data over a VoIP network.
Cisco vs. Microsoft and Nortel for VoIP supremacy: Why it matters to you
Microsoft teams with Nortel in the VoIP market and now they're taking on Cisco. The VoIP arena hasn't been this exciting since it came into being! Find out what all these changes mean to you and what it means to have Microsoft in the voice space.
Learning Guide: What causes VoIP QoS problems
Learn what causes VoIP QoS issues in Section 2 of Roger Freeman's VoIP series.
VoIP security -- Free IP telephony vulnerability test tools: Sniffing and manipulating the packet stream
VoIP security tools designed to test IP telephony vulnerability can be a great help to enterprises, but they can also be exploited by hackers. Stay on top of your organization's VoIP security with the free testing tools listed in this tip.
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, testing and hardware.
What's in a VoIP packet -- An introduction to bandwidth for VoIP
Learn what makes up a VoIP packet, how headers work, what protocols transport voice traffic over the Internet and how this traffic uses network bandwidth.
VoIP bandwidth: Calculate consumption
The bandwidth needed for VoIP transmission depends on compression technology, packet overhead and the network protocol used. In this tip, learn how to calculate how much bandwidth your VoIP implementation will need.
Change your network adapter's IP information
To change a machine's TCP/IP settings, you can use a VBScript to modify the network adapter information on a computer.
Three tips for UC deployment
Three tips to building a unified communications (UC) strategy from Burton Group senior analyst Mark Cortner and Zeus Kerravala, senior vice president with Yankee Group.