Yealink SIP-T21P Quick Start Guide

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G
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3. Connect the network and power, as shown below:
You have two options for network and power connections. Your system administrator will
advise you on which one to use.
A
B
Power Adapter
(DC 5V)
PC Connection
(Optional)
AC Power Option
PoE (Power over
Ethernet) Option
IEEE 802.3af compliant
PoE Hub/Switch
PC Connection
(Optional)
Note:
PoE is only applicable to the SIP-T21P IP phone. If inline power (PoE) is provided, you don’t need
to connect the power adapter. Make sure the Ethernet cable and hub/switch are PoE compliant.
Startup
After the IP phone is connected to the network and
supplied with power, it automatically begins the
initialization process. After startup, the phone is ready for
use. You can configure the phone via web user interface
or phone user interface.
Welcome
Initializing... please wait

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