You can hold one or more calls.

The held call will still occupy the appearance button on which it was made or answered.
The caller will hear music on hold. If your system does not have music on hold available, the caller will hear double beep tones every few seconds.
If you have more than one held call, or one held call and a connected call, pressing the Conference soft key will start a conference between yourself and the calls.

 

Calls that you have held will return to your phone (when idle) if they remain on hold for too long. The default return delay is 15 seconds. Your hold recall can be changed by the system administrator. Returning calls ignore any forwarding or do not disturb settings.

Important - Holding Conference Calls

You can hold a conference call in the same way as holding a normal call. Holding the conference call does not affect the other conference parties who can continue talking. You will also still be listed as a member of the conference call in the conference details.

Warning: This only applies to conference calls hosted by your own telephone system. Holding your call to a conference hosted on another telephone system may cause that conference to hear your system's music on hold.