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Fundamentals of VoIP
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The Future of Telephony-VoIP
A vibrant present sets the stage for a glorious future. The Ip phone systems and cellular systems are slowly increasing their reach
in the market. In the modernized countries there is saturation in
the number of connections and the number of connections is growing
in the developing countries.
A telephone is now an essential means
of communication and the mobile revolution is carrying the concept
of communication to greater vistas. Internet revolution has carried
through the concept of information explosion and is now being promoted
as replacement for the Traditional telephone system.
VoIP has still to find popular acceptance. Its rate of acceptance
is increasing. It is evident in the increased sales and market shares
of Voice over internet telephony related products. Mobile and Cellular
companies are joining the band wagon by enabling voip facilities
on their mobiles. Yet in all the hype of the market, the question
asked is that: Is this new technology voip beneficial to me? Voip
benefits are being marketed by voip service providers and manufacturers.
With ever increasing traffic volumes on the net and security problems
newer standards and solutions need to be offered. This is the delay
in universal acceptance.
Weighing The Benefits of VoIP
Problems exist in every scenario and choice is based on the fact of
advantages of voip and its disadvantages.
POTS and Its Problems
Looking at the old telephone system and its services
- Toll charges in long distance carriers are quite substantial
- You pick up your telephone and your connection is to a PSTN
exchange over a line of small bandwidth
- Your analog voice gets converted to digital signal only
at the Central Office.
- Your call goes across various lines and exchanges belonging
to various companies who collect toll charges.
- Your dedicated line cost much because it is not optimally
used. Thus there is wastage of bandwidth and time on a single call.
You pay for this wastage.
- You cannot have a voice conference or video conference on
your traditional phone since it is dedicated connection between
two persons only.
- Even the POTS or an ISDN line can be used to link to the
internet. The major disadvantage is that they are too slow to download
large files of high resolution graphics and cannot be used in real
time applications reliably.
Telephony Features
Best features of telephony are as follows
Traditional Telephony
The traditional telephone offers three main features. Call processing,
maintenance and providing a continued connection during call. Other
additional features provided free or for some basic payment are
- Call transfer
- Direct Inward Dialing
- Customised Abbreviated dialing (Speed Dialing)
- Voice mail
- Follow-me
- Call forwarding on absence
- Call forwarding on busy
- Music on hold
- Automatic ring back
- Night service
- Call distribution (ACD, fixed sequences, ...)
- Call waiting
- Call pick-up
- Call park
- Call conferencing
- Custom greetings
- Shared message boxes (where a department can have a shared
voicemail box)
- Automated directory services (where callers can be routed
to a given employee by keying or speaking the letters of the employee's
name)
- Call accounting
- Caller ID
VoIP Telephones
- Caller ID
- Call Waiting
- Conference Calling
- Call Forwarding
- Redial last outgoing number
- Call Transfer
- Call Logs
- ; Message Waiting Light
- Hold
- One touch access to Voice Mail messages
- Speed Dial Lists
- Call blocking feature to block calls from anonymous callers
- Customized ringing tones
- Line indicators on multi-line sets show when a line is used
and which line has a voice mail message.
Continue to : Voip Advantages Disadvantages
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Wireless VOIP – Is It Really Secure?
What Do I Need For VoIP?
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