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Voice over Internet
Protocol, or VoIP, architecture consists of end-user devices,
gateways, gatekeepers and the IP network. The software for VoIP
is a collection of programs, applications and protocols to manage the
architecture. The significance of VoIP software is underlined by the
increasing demand for higher quality of service from consumers.
Effective software programming translates into effective management of
calls--in terms of routing of the calls through the least congested
paths--and clarity of voice.
VoIP software can be classified according to the different
functionalities in the VoIP network. These functionalities include the
management of user interfaces, call processing, network management and
billing. User interface software handles the interface to the user of IP
telephone. The important features of the user interface include
algorithms to compress voice data, echo cancellation and encryption.
Call processing servers are run by software to map the destination of
the call. The software is a database program called soft switch. The
software translates the phone number into a unique IP address after
checking the validity of the number. It connects the two devices on both
ends, after alerting the called party of the incoming call through a
ring.
Call administration software, called consoles, are applications that
manage the state of the calls and the distribution. This software
provides bandwidth management. Some of the standard protocols are H.323
session initiation protocol. In order to maintain the quality of
service, real time protocol (RTP) is employed. The software also manages
the networks.
Some of the customer-oriented services managed by software are billing
services. This includes pre- and post-paid services. Some provide
voicemail services that synthesize voice for mails. IP soft phones are
managed by software that lets the user directly connect with the VoIP
provider through a computer. Skype software is rapidly capturing the
market with millions of phone minutes.
Another area where software provides services is in the call-monitoring
systems for call offices to manage the calls and Computer telephony
Integration for businesses.
Software development is accelerated by the need to solve various issues
such as loss of packets and sequencing of packets.
Article Information
by Steve Valentino,
e-ipphones.com
source: goarticles.com
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