VoIP and IP telephony
A strong unified communications strategy starts with voice technology. Explore all facets of enterprise telephony, including hardware and devices, architecture, and standards and protocols like SIP and H.323.
Top Stories
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Tip
17 Aug 2026
Mobile unified communications: Everything you need to know
Mobile unified communications is now a widely adopted strategy for businesses of all types and sizes. Here's everything you need to know about mobile UC. Continue Reading
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Tip
17 Aug 2026
UCaaS vs. VoIP: What's the difference?
Both UCaaS and VoIP offer some compelling benefits, but which approach works better depends on how an organization is structured. Continue Reading
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Answer
10 May 2013
What is a call park phone feature and how does it work?
UC expert, Matt Brunk, explains a call park phone feature, how it works and how it compares to a visual call park feature in this expert response. Continue Reading
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Answer
20 Mar 2013
What are the different types of private branch exchange systems?
The types of PBX systems available shifted after the advent of Internet Protocol, according to IP telephony expert Jon Arnold. Continue Reading
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Answer
05 Mar 2013
Are there advantages to using the public switched telephone network?
You may have to sacrifice some advantages of the public switched telephone network if you switch to VoIP, says telephony expert Jon Arnold. Continue Reading
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Answer
19 Nov 2012
How does VoIP performance differ over LAN, WAN and other networks?
Environment affects VoIP performance, so it's important to consider how VoIP best fits in your environment is important, our UC strategies expert explains. Continue Reading
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Answer
03 Aug 2010
The value of toll bypass in the enterprise
IP telephony expert Jon Arnold explains the value of toll bypass in an IP telephony setup, detailing why enterprises should consider it as an option while tempering cost-savings expectations. Continue Reading
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Definition
07 Mar 2008
hairpinning
In general telecommunication, hairpinning is returning a message from an origin endpoint back in the direction it came from as a way to get it to its destination endpoint. Continue Reading
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Answer
22 Jul 2007
What can a VoIP phone do that a landline phone cannot?
This expert response outlines the basic differences between a VoIP phone and a POTS phone. Continue Reading
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Tip
05 Mar 2007
How silence suppression saves WAN bandwidth
Silence suppression, or voice activation detection (VAD), technology is used to save WAN bandwidth used by VoIP traffic, while comfort noise generation (CNG) counteracts negative affects on VoIP speech quality. Continue Reading
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Tip
12 Feb 2007
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. Continue Reading
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Tip
22 Jan 2007
How voice compression saves bandwidth
Compression of voice traffic can save bandwidth on your IP network, but can cost quality or cause delays. Learn more about the CODECs or standards for voice compression -- and their effect on call quality -- in this tip. Continue Reading
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Tip
07 Jul 2005
Turning analog phones into VoIP phones
How an ATA or broadband phone works and what kind of features and performance you can expect from them. Continue Reading