Yealink SIP-T21P User Manual

Getting Started
11
If your phone is already installed, proceed to Phone Initialization on page 13.
This section introduces how to install the phone:
1) Attach the stand
2) Connect the handset and optional headset
3) Connect the network and power
1) Attach the stand
2) Connect the handset and optional headset
Note
3) Connect the network and power
You have two options for power and network connections. Your system administrator will
advise you which one to use.
 AC power
 Power over Ethernet (PoE)
A headset is not included in the packaging contents. Contact your system administrator
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