Sparklan WVTR-141, Руководство пользователя

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Ch. 1 Introduction to VoIP
VoIP stands for Voice over Internet Protocol, which means transmitting voice over the
most widely accepted network protocol around the world. Internet Protocol networking
is widely supported by almost all kinds of networks. VoIP, however, can also be
implemented inside LAN only without Internet involved if proper LAN environment is
ready. In addition, with improvements, business class VoIP system can integrate data,
voice, and video in the same network. This takes simplified management rules into
three different systems / networks and results in enhanced performance for all kinds of
organizations.
Later on, this chapter will guide you through the basic elements of the VoIP and some
related terms involved as below:
z
Advantages of VoIP to Businesses
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SIP – Most Popular VoIP Protocol
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VoIP-Friendly Networking Concepts
1.1 Advantages of VoIP to Businesses
Telephony system was invented around 100 years ago by Alexander Graham Bell.
Though telephones expedite the business communications, it’s expensive especially
for international phone calls. Internet Protocol has become the world wide standard.
With remarkable improvements in broadband access, VoIP technology and IP
Telephony, it is about time to provide businesses high quality IP phone calls at
comparably low cost with good reliability. Since voice is transmitted over the Internet
there is no demarcation of any physical boundary, this dissolves any need of being
charged at very high rate for making international phone calls.
IP Telephony focuses on using your existing telephony resources to build a vibrant
communications network that enhances productivity. A common business class VoIP
system provides all the features you’ve been familiar with—voicemail, call waiting, call
forwarding, to name a few—as well as many new exciting features such as making
LOCAL calls at whatever location you may be in the world.
Business world needs reliability and productivity as well. In conventional way,
telephony system and computer-based system are two different networks. Hence, the
two different networks require normally two times of man-power to manage, and they
are hardly managed under a set of unified managing principles. Business class VoIP
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