Yealink SIP-T21P User Manual

Getting Started
9
This chapter provides basic installation instructions and information for obtaining the
best performance with the SIP-T21P IP phone. Topics include:
 Packaging Contents
 Phone Installation
 Phone Initialization
 Phone Status
 Basic Network Settings
 Registration
 Idle Screen
If you require additional information or assistance with your new phone, contact your
system administrator.
The following components are included in your SIP-T21P IP phone package:
 SIP-T21P IP Phone
 Phone Stand

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