System → Device Preferences → Keys → M55/M56/M58 PFK → Type
N/A
cordless.x.pfk.y.feature = VALIDVALUE
On handset/deskset x, assign a programmable feature type to the Programmable Feature Key (PFK) y.
where:
x = Device number (1-48) Note: The M500 supports a maximum of 16 devices in dual cell mode.
y = PFK number (1-6 for handset, 1-24 for deskset)
unassigned, keyline, line, call list, dialing line, dir, call log, redial, messages, dnd, cfwd all, cfwd busy, cfwd no answer, setting, speed dial list, intercom call list, callback missed, speed dial, intercom call, paging, paging list, dtmf, silent ringer, silent mode, dect busy monitoring
keyline (with x=1-48, y=1-4)
unassigned (with x=1-48, y=5-24)