VoIP


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VoIP

VoIP

(Voice Over IP) A digital telephone service that uses the Internet for transport, as well as private IP networks. "IP" stands for "Internet Protocol." In order that calls can originate and terminate from regular telephones, connections to the public telephone network (PSTN) are also provided. Telephone companies, cable companies and dedicated providers offer VoIP calling for a fixed monthly fee or low per-minute charge. Customers must have existing Internet access.

Telephony Protocols: SIP/H.323 and Skype
VoIP uses two telephony protocols for handling connections (see SIP and H.323), and most VoIP systems support both. Skype uses its own protocol (see Skype).

Handset Based
Regular phones can be used with many VoIP services by plugging them into an analog telephone adapter (ATA) from the VoIP provider or third party. The ATA converts the phone signals to IP packets. Native IP phones are also available.

Software Only = Softphone
VoIP may be entirely software based, which uses an app in a mobile device or a computer equipped with microphone and speakers. Typically free if both sides are on devices; calls to a regular telephone are per minute. In 1995, VocalTec Communications introduced the first VoIP service in the U.S.; entirely software based (see softphone). Skype is a very popular softphone-based VoIP service (see Skype). See SIP provider.

VoIP Features
Voicemail, caller ID, call forwarding and a softphone option (if not a softphone-only service) are typically part of a VoIP package. Phone numbers with area codes outside of one's own home area may also be an option (see virtual phone number). See IP telephony for more details and history of the technology.






References in periodicals archive ?
With VoIP, "you get the synergy of being able to use your existing Ethernet network and fiber optic networks to provide telephony," says John Bryan, vice president for Information Technology and Services at Clayton State University in Morrow, Ga.
Although the FCC's action displays its power to preempt state regulations that thwart or impede Federal authority over interstate communications, it still leaves unanswered the question of state taxation of VoIP.
The main advantage to implementing a VoIP solution is that it provides the ability to combine voice traffic with data traffic.
As an embedded software voice-enabled Internet modem running on a single Analog Devices' DSP, SmartStack VoIP is completely integrated with the physical layer software (a PSTN modem or an Ethernet MAC) to provide Internet connectivity over the public telephone network or any local area network (LAN).
They also look to independent service providers like Covad and M5 Networks for hosted VoIP solutions.
VoIP is the routing of voice conversations over the Internet or through any other IP-based network.
Touchstone is so committed to the VoIP revolution that we dedicate 100% of our efforts to VoIP session management and back-office products" said Mark Baker, CEO of Dallas, TX based Touchstone Systems, Inc, " we believe XConnect's DirectRoute is a powerful driver of that VoIP revolution.
In order to correctly monitor and secure VoIP applications, customers need be able to unify their view of the network, the applications on that network, and the security products that defend those applications," said Tom Turner, Vice President of Marketing for Q1 Labs.
Half of users report using their residential VoIP service either in part or in whole for business purposes, including more than 40 % of client-based VoIP users.
In conducting laboratory research for their book, Endler and Collier developed and demonstrated many real-world VoIP attack scenarios and tools that hackers will likely use to target enterprise VoIP deployments.
New World Brands and NewGen are committed to situating VoIP in the hands of consumers using methods that follow the traditional sales model for retail calling products.
Tools like NetSensory that can give voice and network managers common ground for problem solving, without adding yet another layer of management complexity, are sorely needed to advance VoIP in the enterprise to the next level.