ZyXEL Communications ZyAir Access Point Series User Manual page 24

ZyAIR Access Point Series User's Guide
DATA RATE (MBPS)
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2
5.5 / 11
The ZyAIR may be prone to RF (Radio Frequency) interference from other 2.4 GHz
devices such as microwave ovens, wireless phones, Bluetooth enabled devices,
Output Power Management
Output Power Management is the ability to set the level of output power.
There may be interference or difficulty with channel assignment when there is a high density of APs within a
coverage area. In this case you can lower the output power of each access point, thus enabling you to place
access points closer together.
Multiple ESS
The ZyAIR's Multiple ESS (Multi-ESS) function allows multiple ESSs to be configured on just one access
point (the ZyAIR). Different wireless stations can use different ESSIDs to associate with the same AP. Only
wireless stations with the same ESSID can communicate with each other. This allows the AP to logically
group wireless stations in a manner similar to VLAN (Virtual LAN). This feature is not available on all
models.
VLAN
A VLAN (Virtual Local Area Network) allows a physical network to be partitioned into multiple logical
networks. Only stations within the same group can talk to each other. Stations on a logical network can
belong to one or more groups. The ZyAIR supports 802.1Q VLAN tagging. Tagged VLAN uses an explicit
tag (VLAN ID) in the MAC header of a frame to identify VLAN membership. The ZyAIR can identify
VLAN tags for incoming Ethernet frames and add VLAN tags to outgoing Ethernet frames.
Configure VLAN (virtual LAN) with multi-ESS to extend the wireless logical grouping to the wired
network. Each ESS is assigned a unique VLAN ID. This feature is not available on all models.
Limit the number of Client Connections
You may set a maximum number of wireless stations that may connect to the ZyAIR. This may be necessary
if for example, there is interference or difficulty with channel assignment due to a high density of APs within
a coverage area.
1-4
IEEE 802.11b
DBPSK (Differential Binary Phase Shift Keyed)
DQPSK (Differential Quadrature Phase Shift Keying
CCK (Complementary Code Keying)
and other wireless LANs.
MODULATION
Getting to Know Your ZyAIR
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