Lancom 821 ADSL/ISDN Manual page 14

LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN
Chapter 1: Introduction
to the original investment costs, ongoing costs are also incurred for the
administration and maintenance of this equipment.
Networking via the Internet
The following structure results when using the Internet instead of direct con-
nections :
All participants have fixed or dial-up connections to the Internet. Expensive
dedicated lines are no longer needed.
The Internet is available virtually everywhere and typically has low access
costs. Significant savings can thus be achieved in relation to switched or ded-
icated connections, especially over long distances.
The physical connection no longer exists directly between two participants;
instead, the participants rely on their connection to the Internet. The access
technology used is not relevant in this case: ideally is the use of broadband
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Head Office
Subsidiary
All that is required is the Internet connection of the LAN in the headquar-
ters. Special switching devices or routers for dedicated lines to individual
participants are superfluous.
The subsidiary also has its own connection to the Internet.
The RAS PCs connect to the headquarters LAN via the Internet.
LAN
Internet
Workstation in remote
access