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Page 281 / 357 Scroll up to view Page 276 - 280
Vigor2830 Series User’s Guide
269
Security
There are three types for security,
Disable
,
WEP
and
Pre-shared key
. The setting you choose here will make the
following WEP or Pre-shared key field valid or not. Choose one
of the types for the router.
WEP
Check this box to use
the same key set in
Security Settings
page. If you did not set any key in
Security Settings
page, this
check box will be dimmed.
Pre-shared Key
Type –
There are two types for you to choose.
WPA
and
WPA2
are used for WDS devices (e.g., AP700). For example, if you
have a wireless AP and a Vigor2830n wireless router, you can
set the encryption mode as WPA or WPA2 to establish your
WDS system between AP and the router.
Key -
Type 8 ~ 63 ASCII characters or 64 hexadecimal digits
leading by “0x”.
Bridge
If you choose Bridge as the connecting mode, please type in the
peer MAC address in these fields.
Four peer MAC addresses are
allowed to be entered in this page at one time. Yet please disable
the unused link to get better performance. If you want to invoke
the peer MAC address, remember to check
Enable
box in the
front of the MAC address after typing.
Repeater
If you choose Repeater as the connecting mode, please type in
the peer MAC address in these fields. Four peer MAC addresses
are allowed to be entered in this page at one time. Similarly, if
you want to invoke the peer MAC address, remember to check
Enable
box in the front of the MAC address after typing.
Access Point Function
Click
Enable
to make this router serving as an access point;
click
Disable
to cancel this function.
Status
It allows user to send “hello” message to peers. Yet, it is valid
only when the peer also supports this function.
4.13.7 Advanced Setting
This page allows users to set advanced settings such as operation mode, channel bandwidth,
guard interval, and aggregation MSDU for wireless data transmission.
Operation Mode
Mixed Mode
– the router can transmit data with the ways
supported in both 802.11a/b/g and 802.11n standards. However,
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the entire wireless transmission will be slowed down if 802.11g
or 802.11b wireless client is connected.
Green Field
– to get the highest throughput, please choose such
mode. Such mode can make the data transmission happening
between 11n systems only. In addition, it does not have
protection mechanism to avoid the conflict with neighboring
devices of 802.11a/b/g.
Channel Bandwidth
20-
the router will use 20Mhz for data transmission and
receiving between the AP and the stations.
20/40 –
the router will use 20Mhz or 40Mhz for data
transmission and receiving according to the station capability.
Such channel can increase the performance for data transit.
Guard Interval
It is to assure the safety of propagation delays and reflections for
the sensitive digital data. If you choose
auto
as guard interval,
the AP router will choose short guard interval (increasing the
wireless performance) or long guard interval for data transmit
based on the station capability.
Aggregation MSDU
Aggregation MSDU can
combine frames with different
sizes.
It is used for improving MAC layer’s performance for
some brand’s clients. The default setting is
Enable.
4.13.8 WMM Configuration
WMM is an abbreviation of Wi-Fi Multimedia. It defines the priority levels for four access
categories derived from 802.1d (prioritization tabs). The categories are designed with specific
types of traffic, voice, video, best effort and low priority data. There are four accessing
categories - AC_BE , AC_BK, AC_VI and AC_VO for WMM.
APSD (automatic power-save delivery) is an enhancement over the power-save mechanisms
supported by Wi-Fi networks. It allows devices to take more time in sleeping state and
consume less power to improve the performance by minimizing transmission latency.
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WMM Capable
To apply WMM parameters for wireless data transmission,
please click the
Enable
radio button.
APSD Capable
The default setting is
Disable
.
Aifsn
It controls how long the client waits for each data transmission.
Please specify the value ranging from 1 to 15. Such parameter
will influence the time delay for WMM accessing categories.
For the service of voice or video image, please set small value
for AC_VI and AC_VO categories For the service of e-mail or
web browsing, please set large value for AC_BE and AC_BK
categories.
CWMin/CWMax
CWMin
means contention Window-Min and
CWMax
means
contention Window-Max. Please specify the value ranging from
1 to 15. Be aware that CWMax value must be greater than
CWMin or equals to CWMin value. Both values will influence
the time delay for WMM accessing categories. The difference
between AC_VI and AC_VO categories must be smaller;
however, the difference between AC_BE and AC_BK
categories must be greater.
Txop
It means transmission opportunity. For WMM categories of
AC_VI and AC_VO that need higher priorities in data
transmission, please set greater value for them to get highest
transmission opportunity. Specify the value ranging from 0 to
65535.
ACM
It is an abbreviation of Admission control Mandatory. It can
restrict stations from using specific category class if it is
checked.
Note:
Vigor2830 provides standard WMM configuration in the
web page. If you want to modify the parameters, please refer to
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Vigor2830 Series User’s Guide
272
the Wi-Fi WMM standard specification.
AckPolicy
“
Uncheck” (default value) the box means the AP router will
answer the response request while transmitting WMM packets
through wireless connection. It can assure that the peer must
receive the WMM packets.
“Check” the box means the AP router will not answer any
response request for the transmitting packets. It will have better
performance with lower reliability.
4.13.9 AP Discovery
Vigor router can scan all regulatory channels and find working APs in the neighborhood.
Based on the scanning result, users will know which channel is clean for usage. Also, it can be
used to facilitate finding an AP for a WDS link. Notice that during the scanning process (about
5 seconds), no client is allowed to connect to Vigor.
This page is used to scan the existence of the APs on the wireless LAN. Yet, only the AP
which is in the same channel of this router can be found. Please click
Scan
to discover all the
connected APs.
Scan
It is used to discover all the connected AP. The results will be
shown on the box above this button.
Statistics
It displays the statistics for the channels used by APs.
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Add to
If you want the found AP applying the WDS settings, please
type in the AP’s MAC address on the bottom of the page and
click Bridge or Repeater. Next, click
Add to
. Later, the MAC
address of the AP will be added to Bridge or Repeater field of
WDS settings page.
4.13.10 Station List
Station List
provides the knowledge of connecting wireless clients now along with its status
code. There is a code summary below for explanation. For convenient
Access Control
, you
can select a WLAN station and click
Add to Access Control
below.
Refresh
Click this button to refresh the status of station list.
Add
Click this button to add current typed MAC address into
Access
Control.

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