HP ProCurve 530 NA (J8986A) Management And Configuration Manual page 286

Special Features
Wireless Distribution System (WDS) and Spanning Tree Protocol (STP)
Figure 8-3. Wired Access Point Provides Wireless WDS Links to Wireless Access Points
8-16
At least one Access Point 530 must be connected to the network by means of
a wired Ethernet connection. This Access Point 530 can then provide wireless
WDS links for up to six other Access Point 530 units. In this configuration, the
connected Access Point 530 (the one with the Ethernet connection) serves as
a central access point to pass traffic to and from the other remote access
points. This configuration is illustrated in Figure 8-3.