Yealink SIP-T21 - Registration; Language; Time & Date; Key as Send

User Guide for the SIP-T21P/SIP-T21 IP Phone
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address (e.g., http://192.168.0.10 or 192.168.0.10) in the address bar of web browser on
your PC. The default administrator user name and password are both “admin”
(case-sensitive).
The options you can use to customize the IP phone via phone user interface and/or via
web user interface are listed in the following table:
Options
Phone User Interface
Web User Interface
Status
√
√
--IP Address
--MAC
--Firmware
--Network
--Phone
--Accounts
Basic Phone Settings
--Contrast
√
√
--Language
√
√
--Time & Date
√
√
--Administrator Password
√
√
--Key as Send
√
√
--Keypad Lock
√
√
-- Volume
√
--Ring Tones
√
√
--Contact Management
--Directory
√
--Local Directory
√
√
--Blacklist
√
√
--Remote Phone Book
√
--Call History Management
√
√
--Logo Customization
√
--Headset Prior
√
--DSS Keys
√
√
--Account Registration
√
√
--Dial Plan
√
--Emergency Number
√
--Live Dialpad
√
--Hotline
√
√
Basic Call Features
√
--Recent Call In Dialing
--Auto Answer
√
--Auto Redial
√
--Call Completion
√
--Call Return
√