ISDN also offers other services such as
call waiting, callback, etc. This enables the user surf the Internet
while telephoning and higher data rates than pos-
sible with the analogue connection (64 kBit/s over
one channel).g.
the Internet.
ISDN
(Integrated Services Digital Network System)
In contrast the analogue connection, ISDN allows
two conversations take place the same time via a
special bus system (S0 bus), which provides two
channels.
Telephone systems
In many cases, modern telephone systems also act as
interfaces for number different data services, e. Telecom-
munication means the transmission, over substantial
distance, any kind information via technical infra-
structures. There are three distinctly different essential sys-
tems.3. That includes everything from high-speed
transmissions via optical fibre sending simple fax.2.
Standard analogue connection
Unlike other systems, the standard analogue connec-
tion offers additional services. Access the Inter-
net via separate modem.3 Telecommunications
Today, telecommunications are used all kinds dif-
ferent applications.
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Chapter The internal lightning protection system
. Many terminal devices that enable this ac-
cess are connected into the lines themselves and
must integrated into the surge protection concept
accordingly. there are now number different
systems, these devices must have selective protec-
tion.Protection ISDN DSL connection with TeleDefender
3. Many people associate the term
“telecommunications” only with the traditional tele-
phone, but the spectrum much broader. Because the analogue
connection without technical accessories provides
only one channel, the Internet cannot accessed
while telephoning and likewise, telephone call is
possible while surfing
