Yealink SIP-T21P User Manual

User Guide for the SIP-T21P IP Phone
8
The following table shows documentations available for the SIP-T21P IP phone.
Name
Contents
Where found
Format/Language
Quick Installation
Guide
Basic setup of the
phone
In the
package
PDF/English
Quick Reference
Guide
Basic call features and
phone customizations
In the
package
PDF/English
User Guide
Phone/Web user
interface settings
Basic call features and
advanced phone
features
CD attached
in the
package
PDF/English
Note
You can also download the latest documentations online:
http://www.yealink.com/DocumentDownload.aspx?CateId=142&flag=142.

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