Yealink SIP-T21P User Manual

Overview
7
Options
Phone User Interface
Web User Interface
--Intercom
√
--Multicast Paging
--Music on Hold
--ACD
√
--Messages
√
SIP Account
√
--User Options
--Register Status
√
--Activation
√
--Label
√
--Display Name
√
--Register Name
√
--User Name
√
--Password
√
--SIP Server1/2
√
--Server Option
--Server Port
--Outbound Status
√
--Outbound Proxy
√
--NAT Traversal
--STUN Status
√
--STUN Server
√
Note
The table above lists most of the feature options. Please refer to the relevant sections for
more information.

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