HP DS20L - Manual (Page 79)

Remote Management 4-7
4.3.7 Environment Variables
The following command enables or disables the wake-on-LAN feature on the
target system. Valid values are
on and off .
wol_enable
NOTE: This is a system console variable, not a Tru64 UNIX environment
variable. Section 4.3.1 tells you how to enable the wake-on-LAN feature
on the target system. You must enable this feature before you use the
WOL utility.