Yealink SIP-T21P User Manual

User Guide for the SIP-T21P IP Phone
6
Options
Phone User Interface
Web User Interface
--Contrast
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--Language
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--Time & Date
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--Administrator Password
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--Key as Send
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--Keypad Lock
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-- Volume
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--Ring Tones
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--Contact Management
--Directory
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--Local Directory
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--Blacklist
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--Remote Phone Book
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--Call History Management
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--Logo Customization
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--Headset Prior
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--DSS Keys
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--Account Registration
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--Dial Plan
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--Emergency Number
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--Live Dialpad
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--Hotline
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Basic Call Features
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--Recent Call In Dialing
--Auto Answer
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--Auto Redial
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--Call Completion
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--Call Return
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--DND
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--Call Forward
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--Call Transfer
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--Call Waiting
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--Conference
--Call Park
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--Call Pickup
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--Anonymous Call
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--Anonymous Call Rejection
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Advanced Phone Features
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--BLF
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--Call Recording
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--Hot Desking
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Yealink SIP-T21P Specifications

General

Display	132 x 64-pixel graphical LCD
Network	10/100 Mbps Ethernet
SIP Accounts	2
Wall Mountable	Yes
Audio Features	HD Voice
Protocols	SIP v1 (RFC2543), v2 (RFC3261)
Voice Codecs	G.711(A/μ), G.729AB, G.726, G.722
Phonebook	1000 entries
Call Features	Call hold, call waiting, call transfer, call forward, 3-way conferencing
Security	SRTP, TLS, 802.1x, HTTPS
Ethernet Ports	2 x RJ45 10/100 Mbps
Power Supply	Power over Ethernet (PoE) or optional power adapter
Operating Humidity	10% to 90% (non-condensing)
Languages	Supports multiple languages
PoE	Yes (802.3af)
Operating Temperature	-10°C to 50°C