HP ProCurve Wireless Access Point 420 - Hewlett Packard

Modifying Radio Settings
Access Point Configuration
Modifying Radio Settings
The access point can operate in three standard modes, IEEE 802.11b only,
802.11g only, or a mixed 802.11b/802.11g mode.
Not e Both the IEEE 802.11g and 802.11b standards operate within the 2.4 GHz band.
In a wireless LAN environment there can often be interference from other
2.4 GHz devices, such as cordless phones. If you experience poor wireless
LAN performance, try to limit any possible sources of radio interference
within the service area.
The IEEE 802.11g standard is an extension of the IEEE 802.11b standard and
enables client stations with 802.11b wireless network cards to associate to an
802.11g access point. However, the 802.11b standard uses Complementary
Code Keying (CCK) modulation technology to achieve a communication rate
of up to 11 Mbps, whereas 802.11g uses Orthogonal Frequency Division
Multiplexing (OFDM) to reach rates of up to 54 Mbps. (Note that the 802.11g
standard is backward-compatible with 802.11b and therefore includes the
ability to use OFDM or CCK modulation.) To support both 802.11g and 802.11b
clients, the access point has to first communicate with all clients using CCK
and only switch to OFDM for data transfers between 802.11g-compatible
clients. This mechanism has the effect of reducing the maximum throughput
for 802.11g clients in the network.
Working in its mixed “b/g” mode, the access point will experience reduced
data throughput, even if there are no 802.11b clients active in the network. To
achieve a higher throughput, you can set the access point to operate in 802.11gonly
mode, which ignores all 802.11b clients in the service area.
Not e Both the IEEE 802.11g and 802.11b standards operate within the 2.4 GHz band.
If you are operating in “802.11g-only” mode, any 802.11b devices in the service
area will contribute to the radio frequency noise and affect network performance.
Web: Modifying the Radio Working Mode and Settings
The Port/Radio Settings window on the Configuration tab provides the basic
settings for the access point’s radio operation.
The access point’s radio channel settings are limited by local regulations,
which determine the number of channels that are available.
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