More about Internet Telephony
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4 More about Internet Telephony
Voice over IP (VoIP)
Internet telephony has already been in use for years, but
today it allows even private customers the convenience fa-
miliar from conventional telephony, usually at significant-
ly lower prices.
Internet telephony has also made it considerably more
convenient to use applications like conference calls and
answering machines in networks. Further advantages in-
clude global availability at a single telephone number,
and the development of new standards for security and
voice quality.
Data Transfer All kinds of data transmission in the Internet use the Inter-
net Protocol (IP). IP is packet-oriented. This means that
the data are broken down into data packets for transmis-
sion and IP takes care of the transport of the individual da-
ta packets through the Internet. Language is also trans-
mitted in the Internet in this manner.
In opposition to this, fixed-line telephony transmits data
in a line-oriented manner. In this case data are transmit-
ted in a coherent data stream.
4.1 Telephony Scenarios
If you have configured both a fixed-line number and an In-
ternet telephone number in FRITZ!Box, you can make calls
in all directions:
• from the fixed-line network into the fixed-line net-
work
• from the Internet into the fixed-line network
• from the Internet into the Internet
and receive calls from all directions as well.
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