Dtim Interval - NetComm NB9 User Giude

Basic Rate
Fragmentation Threshold
RTS Threshold

DTIM Interval

Beacon Interval
NB9/NB9W ADSL2+ VoIP Router
YML790 Rev1
Leave as default
Enter a value between 256 (min) and 2346 (max).
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.
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
unless you are troubleshooting wireless network
issues. Setting the 'Fragmentation Threshold' too low
may result in poor performance.
Request To Send, set in bytes, specifies the packet
size beyond which the WLAN Card invokes its
RTS/CTS (Clear To Send) mechanism. Packets that
exceed the specified RTS threshold trigger the RTS/
CTS mechanism. The NIC (Network Interface Card)
transmits smaller packet without using RTS/CTS.
The default setting of 2347 (maximum length)
disables RTS Threshold.
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 NB9W
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.
The amount of time between beacon transmissions.
Each beacon transmission identifies the presence
of an wireless client (or access point). By default,
WLAN passively scan all RF channels and listen for
beacons coming from access points to find a suitable
access point.
Before a station (wireless client) 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).
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