Polycom VVX 201 Getting Started page 17

Place and Resume A Call on Hold
You can place any active call on hold:
From Lines or Calls view, press the Hold soft key (VVX 201)
From Calls view, be sure to highlight the call first
To resume a held call:
From Lines view, press the Resume soft key the last call you held will be
resumed
use the up and down arrow keys to highlight the call,
From Calls view,
and press the Resume soft key