Cisco's IP telephony offering has become so complex in such a short period of time that to learn about it now involves a two-part, eight-day training course. Delegates can either attend the two parts ...

IP telephony began humbly as a novelty application that allowed online users to converse over the Internet. Today, it has finally matured enough in both feature sets and network availability that it ...

The two-way transmission of voice over a packet-switched IP network, which is part of the TCP/IP protocol suite. The terms "IP telephony" and "voice over IP" (VoIP) are synonymous. However, the term ...

Virtually all currently marketed IP telephony systems share a common design platform of server-based call control and distributed media gateways, but there still remain noticeable differences that ...

While mobile telephone viruses have been the subject of headlines recently, IP-based telephones could represent a more immediate security threat for many businesses. "Attacks on IP phones are actually ...

Phone configuration: Siemens embraces phone-side configuration of IP-telephony parameters. For example, setting the jitter-buffer size, a key parameter affecting VoIP voice quality, can be modified ...

In an effort to cut costs, my company has decided to migrate from private branch exchanges to IP telephony. By routing calls over our existing IP network and using voice-over-IP links, we can ...

We guess it's only appropriate that, after our last testdrive of the Artisoft TeleVantage platform, we do Vertical next, since Artisoft announced they acquired Vertical last week. Vertical Networks ...

To hear vendors talk about it, you’d think IP telephony in the enterprise was a tsunami about to break across corporate America. Indeed, traditional private branch exchange (PBX) vendors, initially ...

The networking hardware vendor also plans to unveil an NBX IP conference phone with partner Polycom. With the NBX upgrade, 3Com has completely integrated the NBX and the 4400 switch so that no ...

Describe the various call types in a VoIP network. Configure analog voice interfaces as new devices are introduced into the voice path. Configure dial peers so you can add call routing intelligence to ...

During the past four years, IP telephony has progressed from a gee-whiz concept of free phone calls over the Internet to a means of communication in use among established service bureaus. But it is ...