ZyXEL Communications ZYWALL USG 20 Manual page 251

Table 58 Configuration > Network > Interface > WLAN
LABEL
QoS
802.11n Settings
Aggregation
MSDU(A-
MSDU)
Auto Block
ACK
Guard Interval
Add
Edit
Remove
Activate
Inactivate
Object
References
#
Status
Name
SSID
ZyWALL USG 20/20W User's Guide
DESCRIPTION
Select the Quality of Service priority for this traffic.
• If you select WMM (Wi-Fi Multimedia) from the QoS list, the priority
of a data packet depends on the packet's IEEE 802.1q or DSCP
header. If a packet has no WMM value assigned to it, it is assi g ned the
default priority.
• If you select NONE, the ZyWALL applies no priority to traffic on this
SSID.
This field is available only when 802.11b+g+n or 802.11g+n is
selected as the 802.11 Band.
Check this to allow the grouping of several A-MSDUs (Aggregate MAC
Service Data Units) into one large A-MPDU (Aggregate MAC Protocol
Data Unit). This function allows faster data transfer rates.
This field is available only when 802.11b+g+n or 802.11g+n is
selected as the 802.11 Band.
Check this to add the block ACK (BA) mechanism, in which multiple
frames can be streamed out and acknowledged by a single frame. This
function allows cutting the wait time between frames and increasing the
data throughput.
This field is available only when 802.11b+g+n or 802.11g+n is
selected as the 802.11 Band.
Select Short to increase data throughput. However, this may make data
transfer more prone to errors.
Select Long to prioritize data integrity. This may be because your
wireless network is busy and congested.
The guard interval is the gap introduced between data transmission from
users in order to reduce interference. Reducing the GI increases data
transfer rates but also increases interference. Increasing the GI reduces
data transfer rates but also reduces interference.
Click this to create a new WLAN interface.
Double-click an entry or select it and click Edit to open a screen where
you can modify the entry's settings.
To remove an entry, select it and click Remove. The ZyWALL confirms
you want to remove it before doing so.
To turn on an entry, select it and click Activate.
To turn off an entry, select it and click Inactivate.
Select an entry and click Object References to open a screen that
shows which settings use the entry. See
an example.
This field is a sequential value, and it is not associated with any
interface.
This icon is lit when the entry is active and dimmed when the entry is
inactive.
This field displays the name of the WLAN interface.
This is the SSID (Service Set IDentity) of the WLAN interface.
Chapter 11 Interfaces
Section 11.3.2 on page 232 for
251