In this hotspot Wi-Fi architecture, wireless users in each hotspot are authenticated
by the AG and the backend RADIUS server (i.e., WiNOC)
residing in the WISP headquarter. Authentication is based on the Web redirection
technology as well. By Web redirection, WISP can force its subscribers trying to
wirelessly access the Internet to see online advertisements, so that additional
revenues are possible by selling advertisement spaces on the Web page shown after
For a small hotspot, an AG with built-in AP functionality is enough to provide full
RF coverage in the venue. For a larger hotspot, several APs may be needed to provide
complete RF coverage.
If the APs support the IEEE 802.3af PoE (Power over Ethernet) standard, power can
be supplied through Ethernet cables from a PoE hub/switch rather than by alternate
current (AC). Therefore, power cabling is not necessary; only Ethernet cabling is
needed. Thus cabling costs can be reduced. Another benefit of employing PoE is when
any AP hangs up due to firmware bugs, PoE can be used to restart the AP.
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