A VoIP Gateway (Voice over IP Gateway) is a network device that helps to convert voice and fax calls between an IP network and Public Switched Telephone Network (PSTN) in real time. It is a high performance gateway designed for Voice over IP applications. A VoIP gateway can typically support at least two T1/E1 digital channels. Most VoIP gateways feature at least one Ethernet and telephone port. Various protocols, such as MGCP, SIP, or LTP can help to control a gateway.
VoIP Gateway Benefits
V
[ read more ]
SIP (Session Initiation Protocol) is an IETF standard multimedia conferencing protocol, which includes voice, video, and data conferencing, for use over packet-switched networks.
SIP is an open standard replacement for the ITU's H.323.
SIP is described in RFC 3621 - SIP: Session Initiation Protocol.
SIP is an application-layer control (signaling) protocol for creating, modifying, and terminating sessions with one or more participants. These sessions include Internet telephone calls, mult
[ read more ]
An Analog Telephone Adapter (ATA), also known as the Analog Telephony Adapter, is an electronic device used to enable one or more analog telephones or facsimile machines for Voice over Internet Protocol (VoIP) calls and faxes. An Analog Telephone Adapter basically creates a physical connection by use of telephone and Internet cables between a conventional phone or fax and a computer or an Ethernet gateway. The ATA usually comes with a digital phone and Internet plan provider but it can also be b
[ read more ]
VoIP QoS (Voice over Internet Protocol Quality of Service) is used in VoIP services to determine a VoIP network's overall performance and make changes to increase the customer satisfaction rate. QoS is used in other systems (like computer networks) as well, but is especially important in VoIP services because of the high demand for prompt, real-time voice packet delivery and call handling. VoIP QoS generally refers to the VoIP system's bit rate, delay, and bit error rate and provides customers w
[ read more ]
H.323 is an ITU standard multimedia conferencing protocol, which includes voice, video, and data conferencing, for use over packet-switched networks.
H.323 was the first standard for VoIP, but is being supplanted by SIP.
H.323 defines five components of a multimedia network:
Terminals
Multipoint Control Units (MCUs)
Gateways
Gatekeeper
Border Elements
Terminals are telephone and PC equipment which connect end-users to the H.323 network.
MCUs are responsible for managing c
[ read more ]
Every office and small business needs a method of running multiple communication programs such as conference calling, video conferencing, media distribution, instant messaging, and account management software. To perform these tasks, servers need the help of a SIP gateway to bridge the gap between data streams and the Internet. SIP gateways are also essential in VoIP networks as they allow for mutiple audio and video connections to take place at one time over the Internet. Moreover, using a SIP
[ read more ]
A MagicJack is a VoIP (Voice over Internet Protocol) device that allows users to connect their home telephones to their computer in order to make free calls. A number of influential magazines such as the L.A. Times, CNBC, PC Magazine, and the New York Times strongly recommend MagicJack. It is, by far, the cheapest option for home telephone service in the U.S. While the Magic Jack requires an initial investment, there are never any monthly bills or call fees.
How MagicJack Works
A MagicJack h
[ read more ]
VoIP hardware falls into several categories:
VoIP Interface Cards for PCs
PC Telephones
VoIP Telephones
VoIP Switches
VoIP Gateways
VoIP Routers
VoIP PBX's
VoIP Telephones
VoIP Interface Cards for PCs
VoIP Interface cards for PCs turn your PC into a very capable VoIP telephone.
Leading manufacturers of VoIP interface cards for the PC include:
Digium
VoiceTronix
PC Telephones
PC Telephones are telephones which attach to your PC, usually via the USB port, and all
[ read more ]
MGCP (Media Gateway Control Protocol) is a protocol used within a Voice over IP (VoIP) system. This internal protocol was primarily developed to address the demands of carrier-based IP telephone networks. MGCP is a complementary protocol for both H.323 and SIP, which was designed as an internal protocol between the Media Gateway Controller and the Media Gateway. In MGCP, an MGC primarily handles all the call processing by linking with the IP network through constant communications with an IP sig
[ read more ]
Voice over Internet Protocol (VoIP) is a relatively new technology, because of which individual businesses will need someone who is well versed in the intricacies of VoIP. Companies are often willing to invest in training their IT administrators in VoIP because of the sure returns. But, where do you go to obtain a training course that delineates all the necessary concepts and details you need?
There are various options available for those wanting to get themselves trained in VoIP technology. Th
[ read more ]
