IP Telephony
Integrating telephony and data networks makes corporate-network management
easier, improves scalability and reduces operating costs.
Advantages of IP telephony:
- Savings on national and international telephone calls; voice traffic is transmitted
over wide area networks (WANs).
- Cheap cutting-edge technology due to the rapid development of data network
construction technology.
- Reduced administrative costs due to having one network rather than two. IP
networks’ standard DHCP function means installing an IP telephone is as easy
as simply connecting it to a network port. Users can customize their own telephone’s
functions by adding soft keys and quick dialing buttons using their Web browser.
- Interactive answering machine that turns functions such as voicemail and
enquiry services into applications to interact with standard data-storage and
processing applications. This reduces implementation costs, and also enhances
functionality: For example, users do not have to call their number to listen
to messages on their answering machine. The longer a single network is used,
the lower its operating costs and the easier its operation, and new services
– videoconferencing, multigroup communications, etc. – will as a result become
more and more popular.
Provision of IP telephony is based on packet switching. The IP protocol is
used to transmit voice traffic, functioning as universal transport. IP is not
transport dependent, and provides internetworking on a global scale.
Telephone services can be carried by packet or cell transmission infrastructures,
such as IP, ATM or Frame Relay, retaining call processing control and ensuring
network-wide quality of service. This technology is based on the expansion
of IP networks and their universal diffusion in both LAN and WAN communications.
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