IP Telephony evolved from PC to PC and PC |
Take it or leave it, IP telephony’s days in the closet are over. Exceptions
notwithstanding, largely on account of state mollycoddling of incumbent service
providers, IP telephony is happening almost everywhere and growing quickly.
While many of the traditional circuit switched telephone networks realized this
only when their revenues went into a tailspin or they felt threatened, many
embraced it, passing on tremendous cost benefits to users of voice services, in
terms of substantially reduced long distance call rates. Of course, reduced call
rate is just one of the many benefits that the deployment of IP-based telephony
services entail. And there are still quality of service and reliability issues,
among other things, that need to be looked into before we bid adieu to point to
point dedicated telephony, in favor of packet-based ones.
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Detailed Information on IP Telephony can be found at |
Historically, IP telephony has evolved (though many regard it as a disruption
and hence a revolution) and grown in countries with high PC and Internet
penetration as a substitute for high cost PSTN telephony, allowing users to
avoid high long distance and international call prices. Beginning sometime in
1994 with PC to PC voice chats, the system evolved into PC to Phone calls in
1996, and Phone to Phone in 1997. It is largely believed that PC to PC and PC to
Phone calls over the public Internet created a new set of users for whom cheap
call rates were the biggest incentive for avoiding PSTN networks.
Currently, there are hundreds of players, mostly based in the US, who claim
to offer "free" PC to PC or PC to phone domestic and international
long distance service. These include names like Net2Phone.com, Phonefree.com,
Dialpad.com, iConnectHere.com (formerly Deltathree.com), etc. Much of the
traffic carried over PC to PC is regarded as new traffic that would not
otherwise have existed.
Total VoIP and PSTN Traffic |
 The same is true of much of the PC to phone traffic —
especially the free ones. However, existing carriers are losing market share
because of some of these and a great majority of calls carried over Phone to
Phone services would have been otherwise made over PSTN.
Many of these PC to Phone or PC to PC service providers have vanished despite
offering cheap or even free voice, pointing towards the fact that offering
standalone cheap voice is not a business that could last long. A case in point
is Firetalk.com. The company will be closing shop this month, notwithstanding
its two million registered users. As such, a more recent approach that this
market has been following is that of leveraging cheap or free voice to get
consumers to subscribe to a host of value-added services like unified messaging.
IDC estimates that the IP telephony market generated traffic equal to 2.7
billion minutes in 1999, and would expand to 135 billion minutes, with revenues
of US$ 19 billion, by 2004. Tarifica estimates that more than 40 percent of all
international calls will be carried over IP by 2004. While Deltathree.com
estimates that IP telephony will account for 35 percent of international traffic
by 2005, Analysys think that it would reach 25 percent by 2004.
How AT&T found a New Opportunity in IP Telephony |
Acknowledging that IP Telephony would allow increased innovation and new communications applications, AT&T, a PSTN monolith, began IP telephony operations in 1997. Even though it accepted that price was a key driver in the IP telephony market, more strong was the realization that the very future of IP telephony depended, in part, on the development of compelling applications that benefit from the integration of voice and data on a single network and user interface, leveraging the significant investments that businesses are making in their IP networks. Two years after the first PC to PC call was made, AT&T started its IP telephony services in August 1997, by introducing AT&T @phone Service to Japanese customers. AT&T @phone is based on the Phone to Phone call type and provides a calling-card-like experience, terminating calls to 140 countries. To date, AT&T claims that the service is routing millions of minutes per month over AT&T’s IP network and is growing at more than 20 percent, month after month. In May 1998, AT&T started offering Voice over IP services to US consumers through AT&T Connect ‘N Save® Service Launched in three US cities, and currently available in seven, this service also uses a multistage, calling-card-like dialing scenario. In June 1998, AT&T |
According to a survey conducted by iLocus.com, there are over 1,600 companies
offering Internet telephony, of which 50 percent are backed by financial
institutions. The global IP market is growing at a rate of 120 percent annually,
with PC to phone traffic reaching 280 million minutes per month.
According to the survey, the manufacturing sector in IP networks is growing
at 149 percent annually, but soon the services growth figures will take over the
equipment growth rate.
For the telecom regulators, this fast paced growth of IP telephony has posed
many questions, fueling a debate on whether to embrace and then regulate it or
just ignore it or prohibit it completely. While IP Telephony is permitted
unconditionally in the USA, it is permitted in the European Union countries only
when the voice traffic is not real time. Countries like Japan, New Zealand,
Poland (Phone to Phone by mobile operators only), Czech Republic (except Phone
to Phone by other than the incumbent), Hong Kong SAR, Singapore and Switzerland
permit real time IP telephony, with certain light conditions. In Australia,
Canada and South Korea it is permitted and treated on par with other voice
telecommunications services. Acknowledging its inability to check proliferation
of clandestine Internet telephony operations, China opened its IP telephony
market in April 1999, with licenses to three state-owned carriers to roll out
services.
Many countries, mostly developing ones, do not allow any type of voice
traffic that bypasses circuit-switched networks largely because competition with
incumbent carriers is prohibited. However, many of these may be tolerating PC to
Phone calls because it is not considered voice telephony at all by them.
Besides, many others have liberalized services like Fax-over-IP (FoIP). The
International Telecommunications Union (ITU) has noted that many developing
countries are following "asymmetric policies" with a view to
maximizing incoming settlement payments. This, according to ITU, means that many
countries permit (or even encourage) use of the Internet to carry outgoing
international calls (thereby bypassing the accounting rate system), while
insisting that carriers making incoming international calls pay the full inward
settlement rate.
Interestingly enough, even though the US Federal Communications Commission
(FCC) has ruled that Phone to Phone IP telephony (both true Internet telephony
and VoIP) appears to be functionally equivalent to PSTN voice services; they are
not governed by any telecommunication regulations. Incidentally, the US is also
the country of origin of the highest number of IP telephony voice calls.
While users have benefited from the cheap IP telephony based long distance
calls, for incumbent carriers, especially in countries where IP telephony is
allowed, this has forced a number of complex issues. While on the one hand a new
set of pure IP-based service providers, with no legacy networks, have
cannibalized their revenues, on the other hand, it has left them wondering
whether to move towards providing telephony services over an IP platform and at
what speed. This is largely because many of the incumbent operators who planned
to implement VoIP, matching the quality and reliability of circuit switched
networks, found the price advantage disappearing in the face of dampening prices
for traditional telephony. For instance, long distance calls in the US are now
down to 5 cents per minute from around 25 cents per minute a couple of years
back. In places like Hong Kong, where a call to the US cost 20 cents per minute
a year back, it now costs 3 cents per minute. PSTN calls to the US during the
night in Hong Kong, cost as little as one cent per minute.
VoIP, however, has certainly forced the incumbent carriers to reorient their
business strategy and technological inclinations away from a circuit-switched
environment. In most cases traditional carriers are looking at migration to an
IP-based platform as a step towards facilitating integrated voice, data and
video services, thereby opening new revenue opportunities. Cheap voice as a
business case is already out of favor with these carriers. These include
carriers like AT&T, BT, KPN, Deutsche Telekom, Telekom, Telenor, Telia,
Sonera, Telstra, KDD, NTT, Korea Telecom, Sprint, Japan Telecom, China Telecom,
etc. These carriers are mostly looking at combining the values of traditional
telephony—reliability and quality of service–with the convergence-multimedia
opportunities offered by IP.