Compex Systems 802.11N - Manual (Page 11)

Station WDS Mode
Station WDS mode is similar to Station mode. The difference is Station WDS
must connect to access point configured to Access Point WDS (or RootAP)
mode.
Station WDS is mainly use for point-to–point connection between 2 buildings or
locations as far as several kilometer away.
Point-to-Point
Point-to-MultiPoint
An access point setup as Access Point WDS
(or RootAP) and other as Station WDS
(Transparent Client). An access point setup as Access Point WDS
(or RootAP) and several other devices as
Station WDS (or Transparent Client).
This mode is generally used for outdoor connections over long distances, or for
indoor connections between local networks.