Rebooting the deskphone

Polycom Soundpoint IP 331

Press the following key combination

Menu -> 3 -> 1 -> 6 -> Yes

Polycom VVX 201

Press the following key combination:

Home -> Setting -> 1 -> 7 -> Yes

Polycom VVX 250

Press the following key combination:

Home -> 7 -> 1 -> 7 -> Yes

General (for phone not listed here)

Menu (or Home button) -> Setting -> Basic -> Restart Phone -> Yes