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Page 96 / 130 Scroll up to view Page 91 - 95
95
Click
Apply
to configure the advanced wireless options.
Option
Description
Band
The new amendment allows IEEE 802.11g units to fall back to
speeds of 11 Mbps, so IEEE 802.11b and IEEE 802.11g devices can
coexist in the same network. The two standards apply to the 2.4
GHz frequency band. IEEE 802.11g creates data-rate parity at 2.4
GHz with the IEEE 802.11a standard, which has a 54 Mbps rate at
5 GHz. (IEEE 802.11a has other differences compared to IEEE
802.11b or g, such as offering more channels.)
Channel
Drop-down menu that allows selection of a specific channel.
Auto Channel
Timer (min)
Auto channel scan timer in minutes (0 to disable)
54g Rate
Drop-down menu that specifies the following fixed rates:
Auto:
Default.
Uses the 11 Mbps data rate when possible but drops to
lower rates when necessary.
1 Mbps, 2Mbps, 5.5Mbps, or 11Mbps
fixed rates.
The appropriate setting is dependent on signal
strength.
Multicast Rate
Setting multicast packet transmit rate.
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96
Basic Rate
Setting basic transmit rate.
Fragmentation
Threshold
A threshold, specified in bytes, that determines whether packets
will be fragmented and at what size.
On an 802.11 WLAN, packets
that exceed the fragmentation threshold are fragmented, i.e., split
into, smaller units suitable for the circuit size.
Packets smaller
than the specified fragmentation threshold value are not
fragmented.
Enter a value between 256 and 2346.
If you experience a high packet error rate, try to slightly increase
your Fragmentation Threshold.
The value should remain at its
default setting of 2346.
Setting the Fragmentation Threshold too
low may result in poor performance.
RTS Threshold
Request to Send, when set in bytes, specifies the packet size
beyond which the WLAN Card invokes its RTS/CTS mechanism.
Packets that exceed the specified RTS threshold trigger the
RTS/CTS mechanism.
The NIC transmits smaller packet without
using RTS/CTS.
The default setting of 2347 (maximum length)
disables RTS Threshold.
DTIM Interval
Delivery Traffic Indication Message (DTIM), also known as Beacon
Rate.
The entry range is a value between 1 and 65535. A DTIM is
a countdown informing clients of the next window for listening to
broadcast and multicast messages.
When the AP has buffered
broadcast or multicast messages for associated clients, it sends the
next DTIM with a DTIM Interval value.
AP Clients hear the
beacons and awaken to receive the broadcast and multicast
messages.
The default is 1.
Beacon Interval The amount of time between beacon transmissions.
Each beacon
transmission identifies the presence of an access point.
By
default, radio NICs passively scan all RF channels and listen for
beacons coming from access points to find a suitable access point.
Before a station enters power save mode, the station needs the
beacon interval to know when to wake up to receive the beacon
(and learn whether there are buffered frames at the access point).
The entered value is represented in ms. Default is 100.
Acceptable entry range is 1 to 0xffff (65535)
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97
Xpress
TM
Technology
Xpress Technology is compliant with draft specifications of two
planned wireless industry standards.
54g
TM
Mode
Set the mode to 54g Auto for
the widest compatibility. Select the mode to
54g Performance for the fastest performance
among 54g certified equipment. Set
the mode to 54g LRS if you are experiencing
difficulty with legacy 802.11b equipment.
54g Protection
In Auto mode the router will use
RTS/CTS to improve 802.11g performance in
mixed 802.11g/802.11b networks. Turn
protection off to maximize 802.11g throughput
under most conditions.
Preamble Type Short preamble is intended for application where maximum
throughput is desired but it doesn’t cooperate with the legacy.
Long preamble interoperates with the current 1 and 2 Mbit/s DSSS
specification as described in IEEE Std 802.11-1999
Transmit Power The router will set different power output (by percentage)
according to this selection.
WMM (Wi-Fi
Multimedia)
The technology maintains the priority of audio, video and voice
applications in a Wi-Fi network. It allows multimedia service get
higher priority.
WMM No
Acknowledgem
ent
Refers to the acknowledge policy used at the MAC level. Enabling
no Acknowledgement can result in more efficient throughput but
higher error rates in a noisy Radio Frequency (RF) environment.
WMM APSD
This is Automatic Power Save Delivery. It saves power.
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98
7.6 Station Info
This page shows authenticated wireless stations and their status.
MAC
Lists the MAC address of all the stations.
Associated
Lists all the stations that are associated with the Access
Point, along with the amount of time since packets were transferred
to and from each station. If a station is idle for too long, it is removed
from this list.
Authorized
Lists those devices with authorized access.
SSID
Lists which SSID of the modem that the stations connect to.
Interface
Lists which interface of the modem that the stations connect to.
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99
Chapter 8
Diagnostics
The Diagnostics screen provides feedback on the connection status of the router and
the ADSL link.
The individual tests are listed below. If a test displays a fail status,
click the
Test
button, to determine whether the fail status is consistent. If the test
continues to fail, click
Help
and follow the troubleshooting procedures.
Test
Description
Ethernet Connection
Pass:
indicates that the Ethernet interface from your
computer is connected to the LAN port of your router. A
flashing or solid green LAN LED on the router also signifies
that an Ethernet connection is present and that this test is
successful.
Fail:
Indicates that the router does not detect the Ethernet
interface on your computer.
USB Connection
Pass:
Indicates that the USB interface from your computer is
connected to router properly.
Down:
Indicates that the router does not detect the signal
from USB interface.
Wireless Connection
Pass:
Indicates that the Wireless interface from your
computer is connected to the wireless network.
Down:
Indicates that the ADSL router does not detect the
wireless network.
ADSL
Synchronization
Pass:
Indicates that the router has detected an ADSL signal
from the telephone company.
A solid WAN LED on the router
also indicates the detection of an ADSL signal from the
telephone company.
Fail:
Indicates that the router does not detect a signal from
the telephone company’s DSL network.
The WAN LED will
continue to flash green.

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