ZyXEL Communications NBG-417N User Manual
Chapter 7 Wireless LAN
NBG-417N User’s Guide
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7.7 Quality of Service (QoS) Screen
The QoS screen allows you to automatically give a service (such as e-mail, VoIP or FTP) a priority
level.
level.
Fragmentation
Threshold
Threshold
The threshold (number of bytes) for the fragmentation boundary for directed
messages. It is the maximum data fragment size that can be sent. Enter an even
number between 256 and 2346.
messages. It is the maximum data fragment size that can be sent. Enter an even
number between 256 and 2346.
This field is not available when Super Mode is selected.
Beacon
Interval
Interval
When a wirelessly networked device sends a beacon, it includes with it a beacon
interval. This specifies the time period before the device sends the beacon again.
The interval tells receiving devices on the network how long they can wait in low-
power mode before waking up to handle the beacon. This value can be set from
20ms to 1000ms. A high value helps save current consumption of the access point.
interval. This specifies the time period before the device sends the beacon again.
The interval tells receiving devices on the network how long they can wait in low-
power mode before waking up to handle the beacon. This value can be set from
20ms to 1000ms. A high value helps save current consumption of the access point.
DTIM
Delivery Traffic Indication Message (DTIM) is the time period after which broadcast
and multicast packets are transmitted to mobile clients in the Active Power
Management mode. A high DTIM value can cause clients to lose connectivity with
the network. This value can be set from 1 to 100.
and multicast packets are transmitted to mobile clients in the Active Power
Management mode. A high DTIM value can cause clients to lose connectivity with
the network. This value can be set from 1 to 100.
Preamble
A preamble affects the timing in your wireless network. There are two preamble
modes: long and short.
modes: long and short.
If a device uses a different preamble mode than the NBG-
417N does, it cannot communicate with the NBG-417N.
CTS Protection
When set to None, the NBG-417N protects wireless communication against
interference.
interference.
When set to Always, the NBG-417N improves performance within mixed wireless
modes.
modes.
Select Auto to let the NBG-417N determine whether to turn this feature on or off in
the current environment.
the current environment.
Tx Power
This field controls the transmission power of the NBG-417N. When using the NBG-
417N with a notebook computer, select a lower transmission power level when you
are close to the AP in order to conserve battery power.
417N with a notebook computer, select a lower transmission power level when you
are close to the AP in order to conserve battery power.
Enable Intra-
BSS Traffic
BSS Traffic
A Basic Service Set (BSS) exists when all communications between wireless clients
or between a wireless client and a wired network client go through one access point
(AP).
or between a wireless client and a wired network client go through one access point
(AP).
Intra-BSS traffic is traffic between wireless clients in the BSS. When Intra-BSS is
enabled, wireless client A and B can access the wired network and communicate
with each other. When Intra-BSS is disabled, wireless client A and B can still access
the wired network but cannot communicate with each other.
enabled, wireless client A and B can access the wired network and communicate
with each other. When Intra-BSS is disabled, wireless client A and B can still access
the wired network but cannot communicate with each other.
Apply
Click Apply to save your changes back to the NBG-417N.
Reset
Click Reset to reload the previous configuration for this screen.
Table 29
Network > Wireless LAN > Advanced
LABEL
DESCRIPTION