A new dawn is rising for Voice over Internet Protocol
(VoIP) as companies are increasingly replacing their legacy
telecommunication networks with IP equipment. VoIP technologies
have matured to the point that it is only a matter of
time before the classic delay, jitter and quality problems
is also getting a boost from the continued deregulation
of the worlds markets. One of these is India, where
in April 2002, Internet telephony was legalised, although
with restrictions. Despite the added costs that these
restrictions entail, the Indian corporate sector has already
begun moving to VoIP in a big way.
usually use the migratory route to IP telephony. A common
strategy is to roll out IP telephony in new network sites
rather than making new investments in legacy equipment.
In wide area networks, enterprises use their existing
routers as voice gateways to connect their private branch
networks (PBXs) to a private IP network service, the Internet,
and the public switched telephone network (PSTN) for off-net
India, VoIP is restricted to communication between computers
and IP-based terminals. In the case of international calls,
communication from a computer to a telephone abroad is
allowed. The VoIP networks also have to operate independently
of the domestic PSTN, and VoIP calls cannot originate
or terminate on a PSTN network within the country.
makes things a little more complicated, because companies
have to keep two phones at each person''s desk, one for
PSTN calls and the other for VOIP.
local area networks, companies can install new IP phones
as legacy telecom exchange leases expire or whenever expensive
equipment upgrades become necessary. Meanwhile, they can
tie the remaining legacy exchanges into the IP network.
options allow companies to start with the deployment size
they are comfortable with. Wherever outdated infrastructure
needs a huge investment just to bring it up to current
technology levels, companies move over to IP en masse.
The city administration of Dallas, Texas, recently replaced
seven legacy networks with a single integrated IP network.
telephony allows users to process phone calls from a standard
data server rather than a proprietary, expensive PBX.
This means trouble-shooting can be done by in-house computer
experts, and companies save on costly service calls.
the main attraction of VoIP right now is cost, in future
it will be driven by innovation in converged data, voice,
and video applications.
of these are:
Unified messaging. With unified messaging, users
can access all forms of messages voice mail, email,
fax, and video mail from a common mailbox.
call centres. IP-based call centres can allow users
and customer service representatives to collaborate using
live, integrated Web-based voice, video, and data conversations.
Call centre agents can push pertinent information and
graphics to the user across the Web during the discussion.
This application is likely to pick up even more steam
as VoIP over DSL, cable, and other broadband access services
become available, because users will not require a separate
PSTN line to talk to a call agent.
delivery: More companies are planning to conduct training
and communications Webcasts over their intranets, and
content providers are beginning to deliver streaming-media
events over the Internet. IP networks can be modified
for content delivery.
VoIP can only go from strength to strength. It doesn''t
make business sense to run two or more networks when you
can run just one, and since IP networks offer so many
benefits, its legacy networks that may eventually
get phased out.