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In relatively short
period of time, IP telephony is expected to revolutionize the
telecommunications
industry. Advantages of IP telephony include lower cost long
distance and reduced
access charges, more efficient backbones and compelling new services. The
benefits of shifting traditional voice onto packet networks can be reaped by
businesses, Internet Service Providers (ISP), traditional carriers etc.
Business benefits from IP telephony because it takes advantages of existing
data networks, reducing operating costs by managing only one network and
enables them to enjoy almost-toll quality voice. In a recent survey, conducted
by Forester Research of 52 Fortune 1000 Firms, more than 40% of telecom
managers plan to move some voice/fax traffic to IP network by 1999. For
consumers IP telephony started from inexpensive or even free Internet calls.
Although IP telephony calls lack certain quality when compared to calls in
PSTNs people are willing to sacrifice it for much less costs. Many households
have only one telephone line which is often used for Web browsing. Therefore
they would like to use IP telephony as a way of accepting incoming calls by rerouting
them to the PC.
ISPs have also become
increasingly focused on IP telephony because it enables them to offer new
services beyond Internet access (voice/fax), improve their network utilization,
and offer voice services at significantly lower rates. It is forecasted that
the Internet will carry 11% of U.S. & International long distance traffic
and 10% of the world's fax traffic by 2002.[9] In
fact, UUNET, PSINet, IDT and America Online have already announced IP telephony
and fax plans for 1999.
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