Mitel 6800i Series Administrator's Manual page 37

IP Phone Models
KEY DESCRIPTION
Top Softkeys - 12 programable keys that allow you to easily perform up to 44
specific functions and access enhanced services provided by third parties
(e.g. XML applications).
Bottom Softkeys - 5 programmable keys that support up to 24 functions.
These keys also act as state-based keys allowing you to easily perform
context-senstive functions during specific states (i.e. when the phone is an
idle, connected, incoming, outgoing, or busy state).
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