Aastra 6700i Series Administrator's Manual page 56

IP Phone Models
Key Description
Speaker/Headset Key - Transfers the active call to the speaker or headset, allowing handsfree use of the phone.
Programmable Keys - When programmed, allows you to easily perform up to 8 specific functions (e.g. Services, Directory,
Callers List, Intercom, etc...) and access enhanced services provided by third parties (e.g. XML applications).
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