User guide
Table Of Contents
- 3Com Wireless 8760 Dual-radio 11a/b/g PoE Access Point
- Contents
- Introduction
- Installing the Access Point
- Installation Requirements
- Power Requirements
- Safety Information
- Deciding Where to Place Equipment and Performing A Site Survey
- Before You Begin
- Connecting the Standard Antennas
- Connecting Power
- Checking the LEDs
- Wall, Ceiling, or Electrical Box Mounting
- Flat Surface Installation
- Selecting and Connecting a Different Antenna Model
- Installing Software Utilities
- Initial Configuration
- System Configuration
- Command Line Interface
- Using the Command Line Interface
- General Commands
- System Management Commands
- System Logging Commands
- System Clock Commands
- DHCP Relay Commands
- SNMP Commands
- snmp-server community
- snmp-server contact
- snmp-server location
- snmp-server enable server
- snmp-server host
- snmp-server trap
- snmp-server engine-id
- snmp-server user
- snmp-server targets
- snmp-server filter
- snmp-server filter-assignments
- show snmp groups
- show snmp users
- show snmp group-assignments
- show snmp target
- show snmp filter
- show snmp filter-assignments
- show snmp
- Flash/File Commands
- RADIUS Client
- 802.1X Authentication
- MAC Address Authentication
- Filtering Commands
- WDS Bridge Commands
- Spanning Tree Commands
- Ethernet Interface Commands
- Wireless Interface Commands
- interface wireless
- vap
- speed
- turbo
- multicast-data-rate
- channel
- transmit-power
- radio-mode
- preamble
- antenna control
- antenna id
- antenna location
- beacon-interval
- dtim-period
- fragmentation-length
- rts-threshold
- super-a
- super-g
- description
- ssid
- closed-system
- max-association
- assoc-timeout-interval
- auth-timeout-value
- shutdown
- show interface wireless
- show station
- Rogue AP Detection Commands
- Wireless Security Commands
- Link Integrity Commands
- IAPP Commands
- VLAN Commands
- WMM Commands
- Troubleshooting
- Index
4-44
CHAPTER 4: SYSTEM CONFIGURATION
Super Mode – The Atheros proprietary Super G performance enhancements
are
supported by the access point. These enhancements include bursting,
compression, fast frames and dynamic turbo. Maximum throughput ranges
between 40 to 60 Mbps for connections to Atheros-compatible clients.
(Default:
Disabled)
Radio Channel – The radio channel that the access point uses to communicate
with wireless clients. When multiple access points are deployed in the same area,
set the channel on neighboring access points at least five channels apart to avoid
interference with each other. For example, in the United States you can deploy up
to three access points in the same area (e.g., channels 1, 6, 11). Also note that
the channel for wireless clients is automatically set to the same as that used by
the access point to which it is linked. (Range: 1-11; Default: 1)
Auto Channel Select – Enables the access point to automatically select an
unoccupied radio channel. (Default: Enabled)
Maximum Transmit Data Rate – The maximum data rate at which the
access point transmits unicast packets on the wireless interface. The
maximum transmission distance is affected by the data rate. The lower the
data rate, the longer the transmission distance. (Default: 54 Mbps)
Preamble Length – Sets the length of the signal preamble that is used at
the start of a data transmission. (Default: Long)
Short: Sets the preamble to short (96 microseconds). Using a short
preamble can increase data throughput.
Long: Sets the preamble to long (192 microseconds). Using a long
preamble ensures the access point can support all 802.11b and 802.11g
clients.
Auto: Sets the preamble according to the capability of clients that are currently
asscociated. Uses a short preamble (96 microseconds) if all associated clients
can support it, otherwise a long preamble is used. The access point can increase
data throughput when using a short preamble, but will only use a short
preamble if it determines that all associated clients support it.
CONFIGURING WI-FI MULTIMEDIA
Wireless networks offer an equal opportunity for all devices to transmit data from
any type of application. Although this is acceptable for most applications,
multimedia applications (with audio and video) are particularly sensitive to the
delay and throughput variations that result from this equal opportunity wireless
access method. For multimedia applications to run well over a wireless network, a
Quality of Service (QoS) mechanism is required to prioritize traffic types and
provide an enhanced opportunityî wireless access method.