LevelOne VOI-7011 - Manual (Page 39)

33
Flash Time
Pressing quick on and off-hook (Flash) allows you to use
special features of your host PBX such as transferring an
extension call, or accessing optional telephone services such
as Call Waiting. The flash time depends on your telephone
exchange or host PBX.
Note
The Flash Time depends on your telephone
exchange or Telephone Company. Check system
administrator for more information