Yealink SIP-T21P User Manual

User Guide for the SIP-T21P IP Phone
44
The LCD screen prompts "Delete all records?".
5. Press the Ok soft key to confirm the deletion or the Cancel soft key to cancel.
You can upload your custom logo which will be shown on the idle screen.
To upload a custom logo via web user interface:
1. Click on Features->General Information.
2. Select Custom Logo from the pull-down list of Use Logo.
3. Click Browse to locate the logo file from your local system.
4. Click Upload to upload the file.

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