Yealink T22P

Enterprise IP Phone Using the Basic Call Functions
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--Call Forward
--Call Waiting
--DSS Keys
--Key as Send
--Hot Line
--Anonymous Call
--Auto Redial Settings
--Dial Plan
--Tones
--DND Code
--ReDialTone
--Emergency
--BusyToneDelay
--Return code when refuse
--Return code when DND
--Intercom
--Call Completion
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Basic Phone Functions
--Language
--Time & Date
--Ring Tone
--Phone Volume
--Logo Customization
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Advanced Phone Functions
--Accounts
--Network
--Voice
--Codecs
--Echo Cancellation etc
--Reset to factory
--Set admin password
--Update
--Set AES Key
--Keypad Lock
--Auto Provision
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Other Features
--Messages
--History
--Directory
--Contacts
--Blacklist
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Note:
1. The above table only indicates most of phone functions rather than all of them.