SMC Networks SMC2664W - Manual (Page 25)

S
ETTING
W
IRELESS
P
ROPERTIES
15
12. “Preamble Type” offers a dropdown list with three options: Auto,
Long, or Short (see “Terminology” on page 46 for an explanation of
“Preamble Type.)” If you aren't sure whether all the Clients and
Access point radios in your wireless network support the Short RF
preamble, then leave this setting on “Auto” (Default.)