D-Link DWL-2600AP User Manual - page 616

Configuring Advanced Settings

D-Link

Unified Wired and Wireless Access System 

Oct. 2015

Page 616

D-Link UWS User Manual

APSD Mode

Select Enable to enable Automatic Power Save Delivery (APSD), which is a power 

management method. APSD is recommended if VoIP phones access the network 

through the AP.

Bonjour Across VLan

Bonjour enables end users to discover Services on their local network. While Bonjour 

is focused on smaller networks (e.g. Home Networks) with the advent of mobile 

customers wanting to discover services in close proximity, Bonjour becomes an ideal 

option to facilitate that. However, as Bonjour utilizes mDNS which is constrained to 

a single VLAN, customers are not able to discover services across multiple VLANs by 

default. This setting enables Bonjour to support service across different VLANs. This 

feature is disabled by default.

Frag Threshold

The fragmentation threshold limits the size of packets transmitted over the network. 

Acceptable values are 

even

 numbers from 256-2345. Packets that are under the 

configured size are not fragmented. A value of 2346 means that packets are not 

fragmented.

Short Retries

The value in this field indicates the maximum number of transmission attempts on 

frame sizes less than or equal to the RTS Threshold. The range is 1-255.

Long Retries

The value in this field indicates the maximum number of transmission attempts on 

frame sizes greater than the RTS Threshold. The range is 1-255.

Transmit Lifetime

Shows the number of milliseconds to wait before terminating attempts to transmit 

the MSDU after the initial transmission.

Receive Lifetime

Shows the number of milliseconds to wait before terminating attempts to 

reassemble the MMPDU or MSDU after the initial reception of a fragmented 

MMPDU or MSDU.

Station Isolation

When this option is selected, the AP blocks communication between wireless clients. 

It still allows data traffic between its wireless clients and wired devices on the 

network, but not among wireless clients. This feature is disabled by default.

• To enable Multicast and Broadcast Rate Limiting, click Enabled.

• To disable Multicast and Broadcast Rate Disabled, click Disabled.

Primary Channel

This setting is editable only when a channel is selected and the channel bandwidth is 

set to 40

MHz. A 40-MHz channel can be considered to consist of two 20-MHz 

channels that are contiguous in the frequency domain. These two 20-MHz channels 

are often referred to as the Primary and Secondary channels. The Primary Channel is 

used for 802.11n clients that support only a 20-MHz channel bandwidth and for 

legacy clients.

Use this setting to set the Primary Channel as the upper or lower 20-MHz channel in 

the 40-MHz band.

Short Guard Interval

The guard interval is the dead time, in nanoseconds, between OFDM symbols. The 

guard interval prevents Inter-Symbol and Inter-Carrier Interference (ISI, ICI). The 

802.11n mode allows for a reduction in this guard interval from the a and g definition 

of 800 nanoseconds to 400 nanoseconds. Reducing the guard interval can yield a 10% 

improvement in data throughput. 

Select one of the following options:

• Enable —

  The AP transmits data using a 400 ns guard Interval when 

communicating with clients that also support the 400 ns guard interval. 

• Disable —

  The AP transmits data using an 800 ns guard interval.

Table 355:  Radio Settings (Cont.)

Field

Description