NetComm 3G21WE, User Manual

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20
Etisalat HSPA+ WiFi Router USER GUIDE
Option Description
Band The new amendment allows IEEE 802.11g units to fall back to speeds of 11 Mbps,
so IEEE 802.11b and IEEE 802.11g devices can coexist in the same network. The
two standards apply to the 2.4 GHz frequency band. IEEE 802.11g creates data-
rate parity at 2.4 GHz with the IEEE 802.11a standard, which has a 54 Mbps rate
at 5 GHz. (IEEE 802.11a has other differences compared to IEEE 802.11b or g,
such as offering more channels.)
Channel Drop-down menu that allows selection of a specific channel.
Auto Channel
Timer (min) Auto channel scan timer in minutes (0 to disable)
802.11n/EWC
With drop-down menu, “Auto” is for 11n and “Disable” is for 11g
Bandwidth Drop-down menu specifies the following bandwidth: 20MHz and 40MHz.
Control
Sideband This is available for 40MHz. Drop-down menu allows selecting upper sideband or
lower sideband
802.11n Rate Drop-down menu specifies the following fixed rates. The maximum rate for
bandwidth, 20MHz, is 130MHz and the maximum bandwidth, 40MHz, is 270MHz
802.11n
Protection
It is similar as 802.11g protection. In Auto mode the router will use RTS/CTS
to improve 802.11n performance in mixed 802.11n/ 802.11g/ 802.11b networks.
Turn protection off to maximize 802.11n throughput under most conditions.
Support
802.11n client
only
Drop-down menu allows selecting “On/Off”. Choosing “On” allows the client with
11n only to connect, not for 11g or 11b; choosing “Off” allows the client with
11n/11g/11b to connect
54g Rate
Drop-down menu that specifies the following fixed rates: Auto: Default. Uses
the 11 Mbps data rate when possible but drops to lower rates when necessary.
1 Mbps, 2Mbps, 5.5Mbps, or 11Mbps fixed rates. The appropriate setting is
dependent on signal strength.
Multicast Rate
Setting multicast packet transmit rate.
Basic Rate Setting basic transmit rate.
Fragmentation
Threshold
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. Enter a value between 256 and 2346. 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. Setting the
Fragmentation Threshold too low may result in poor performance.
RTS Threshold Request to Send, when set in bytes, specifies the packet size beyond which the
WLAN Card invokes its RTS/CTS mechanism. Packets that exceed the specified
RTS threshold trigger the RTS/CTS mechanism. The NIC transmits smaller packet
without using RTS/CTS. The default setting of 2347 (maximum length) disables
RTS Threshold.
DTIM Interval 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 AP 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.
Beacon Interval The amount of time between beacon transmissions. Each beacon transmission
identifies the presence of an access point. By default, radio NICs passively
scan all RF channels and listen for beacons coming from access points to find
a suitable access point. Before a station 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). The entered
value is represented in ms. Default is 100. Acceptable entry range is 1 to 0xffff
(65535)
Global Max
Clients The device can support 4 SSID, and each SSID can set its own max clients, but
it can’t be bigger than Global max clients. “Global Max Clients” limits the total
associated clients of the 4 SSID.
Xpress
TM
Technology
XpressTM Technology is compliant with draft specifications of two planned
wireless industry standards.
Transmit Power The router will set different power output (by percentage) according to this
selection.
WIFI