HP 420 User Manual

Wireless Interface Configuration
Configuring Radio Settings
access point. Individual SSID interfaces do not have a limit. Therefore, if
one interface has the maximum number of clients associated, other SSID
interfaces will not be able to associate any clients.
■ Slot Time: Sets the basic unit of time the access point uses for calculating
waiting times before data is transmitted.
• Short: Sets the slot time to short (9 microseconds). A short slot time
can increase data throughput on the access point, but requires that
all clients can support a short slot time (that is, 802.11g-compliant
clients must support a short slot time).
• Long: Sets the slot time to long (20 microseconds). A long slot time
is required if the access point has to support 802.11b clients.
• Auto: Sets the slot time according to the capability of clients that are
currently asscociated. When the Working Mode is set to g only mode
or b & g mixed mode the access point initially uses a short slot time,
but if an 802.11b client attempts association, it automatically changes
to using a long slot time. When the Working Mode is set to b only mode,
the access point always uses a long slot time.
■ Preamble: Sets the length of the signal preamble that is used at the start
of a data transmission. Using a short preamble (96 microseconds) instead
of a long preamble (192 microseconds) can increase data throughput on
the access point, but requires that all clients can support a short preamble.
• Long: Sets the preamble to long. Using a long preamble ensures the
access point can support all 802.11b and 802.11g clients.
• Short or Long: Sets the preamble according to the capability of
clients that are currently asscociated. Uses a short preamble if all
associated clients can support it, otherwise a long preamble is used.
To Modify Radio Settings:
1. Select the Configuration tab.
2. Click the [
Port/Radio Settings] button.
3. To enable the radio, check the Enable check box next to Radio.
4. Select Enable for Auto Channel Select, or select a specific number for the
Radio Channel. If you are deploying access points in the same area, be sure
to select channel numbers that are at least five apart (for example,
channels 1, 6, 11).
5. Modify other radio parameters, if appropriate.
6. Click the
[Apply Changes] button.
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HP 420 Specifications

General

Model	HP 420
Category	Wireless Access Point
Data Link Protocol	IEEE 802.11b/g/n
Frequency Band	2.4 GHz
Security Features	WPA, WPA2
Power Source	Power over Ethernet (PoE)
Operating Temperature	0°C to 40°C