User guide

BigPond Elite™ Wireless Broadband Network Gateway USER GUIDE
34
Option Descri p t i o n
Band The new amendment allows IEEE 802.11g uni t s t o f a l l b a c k t o sp e e d s o f 11
Mbps, so IEEE 802.11b and IEEE 802.11g device s c a n co e x ist i n t he same
network . T h e t w o st a n d a rd s a p p l y t o t he 2.4 GHz fre q u e n c y b a n d . I E E E
802.11g cre a t e s d a t a - ra t e p a ri t y a t 2 .4 GHz wit h t he IEEE 802.11a standard ,
whic h h a s a 5 4 M b p s ra t e a t 5 G H z . ( I E E E 8 0 2 .11 a h a s o t her differe n ce s
compared to IEEE 802.11 b o r g , su c h a s o f f e ri ng more c h a n n e ls . )
Channel Drop-down menu t ha t a l l o w s selection of a sp e c i f ic c h a n n e l .
Auto Channel
Timer (mi n )
Auto channel sc a n t i m e r i n minutes (0 to disable)
802.11n/EWC Wit h d rop-down menu, “Au t o” is for 11n and “Disable” is for 11g
Bandwidt h Drop-down menu sp e c i f i e s t he following b a n d widt h : 20 M H z a n d 4 0 M H z .
Co n t ro l
Sideband
This is avail a b l e f o r 4 0 M H z . D rop-down menu allows se l e c t i ng u p p e r
sideband or lower sideband
802.11n Rate Drop-down menu sp e c i f i e s t he following f i x e d ra t e s . T h e m a x i m u m ra t e
for bandwidt h , 20MHz, is 130 M H z a n d t he maximum bandwi d t h, 4 0 M H z , is
270 M H z
802.11n
Pro t e c t i o n
It is similar as 802.11g pro t e c t i o n . I n Au t o m o d e t he ro u t e r will use RT S /
CTS to improve 802.11 n p e r f o r m a n ce i n mi x e d 8 0 2 .11n / 8 0 2 .11g/ 802.11b
network s . Turn p rotection off to maximize 802.11 n t hroughput under most
conditions.
Support
802.11n cl i e n t
only
Drop-down menu allows se l e c t i ng “On/O f f ” . C h o o si ng “On” allows t he
client wi t h 11n only to connect, not for 11g or 11b; choosi ng “ O ff ” allows
t h e client wit h 11 n / 11 g / 11 b t o co n n e c t
54g Rate Drop-down menu t h a t specifies t h e f o l l o wing f i x e d ra t e s: Auto: D e f a u l t .
Use s t he 11 Mbps data rate when possible but dro p s t o l o w e r ra t e s
when necessary. 1 M b p s , 2 M b p s , 5 . 5 M b p s , o r 11 M b p s f i x e d ra t e s . T h e
appropria t e setting is d e p e n d e n t o n signal st re ngt h .
Multicast R a t e Setting multic a st p a c ket transmi t ra t e .
Basic Rate Setting basic t ra n smi t ra t e .
Fragmentation
Threshold
A t h re s h o l d , specified in by t e s , t ha t d e t e r mines whet h e r p a c kets wil l b e
fragm e n t e d a n d a t w h a t si z e . O n a n 8 0 2 .11 W L AN, packe t s t ha t e x ce e d
t h e f ragmentation t hreshold are fragmented, i.e., sp l i t i n t o , sm a l l e r
units su i t a b l e f o r t he circ u i t si z e . Packe t s sm a l l e r t han t h e specified
fragm e n t a t i o n t hreshold va l u e a re n o t f ragm e n t e d . En t e r a value between
256 and 2346. If you exp e ri e n ce a hig h p a c ke t e rro r ra t e , t r y t o s l ig h t l y
incre a se your Fragmentation Thre s h o l d . T h e va l u e s h o u l d remain at its
default setting o f 2346. Setting t h e Fragmentation Threshold too low may
resu l t i n p o o r p e r f o r m a n ce .
RTS Thre s h o l d Request to Send, when se t i n by t e s , specifies t h e p a c ke t size beyond
whic h t he WLAN Card i n v o ke s i t s RTS/CTS mechanism. Pa c ke t s t hat
exceed t h e specified RTS t h reshold trigger t he RTS/CTS mechanism. The
NIC transmi t s smaller packe t wi t hout using RT S / C T S . T h e d e f a u l t setting o f
2347 (maximum leng t h) d isables RTS Thre s h o l d .