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LANCOM 1811 Wireless DSL – LANCOM 1821+ Wireless ADSL
Chapter 9: Options and accessories
The LANCOM Public Spot Option is the optimal solution for public Wireless
LANs. Wireless LANs are very suitable for company networks and for wireless
networking at home. But for public access services, there is a lack of mecha-
nisms for authentication and billing of single users (AAA - Authentication /
Authorisation / Accounting). This lack remedies the LANCOM Systems Open
User Authentication (OUA), the main part of the LANCOM Public Spot Option.
The OUA procedure realizes the authentication of all wireless clients via user
name and password, and checks the authorization of single users via RADIUS.
Accounting data (online time and data volume) can be transferred per user
and per session to a central RADIUS server. Client PCs need only radio card
(e.g. AirLancer), TCP/IP and an Internet browser. Additional software is not
needed. Therefore, the public spot option is ideally suitable to install wireless
Internet access services in hotels, restaurants, cafés, airports, stations, exhi-
bition centres or universities.
With the LANCOM Public Spot Option you extend a base station additionally
with these functions and upgrade it to a Wireless Public Spot.
9.3
LANCOM VoIP Basic Option and LANCOM VoIP
Advanced Option
The term Voice over IP (VoIP) refers to voice communications over computer
networks based on the Internet protocol (IP). The core idea is to provide the
functions of traditional telephony via cost-effective and wide-spread
networking structures such as the Internet. VoIP itself is not a standard, rather
it is a collective term for the various technologies (equipment, protocols, voice
encoding, etc.) which make voice communications in IP networks possible.
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Authentication
Mobile user
HTTP/
HTTPS
Authorisation,
Service-
Accounting
Provider
RADIUS-
RADIUS
Router
Server
Internet
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