Yealink SIP-T21P User Manual

Getting Started
15
Port.
2. Press or to select IPv4, IPv6 or IPv4 & IPv6 from the IP Mode field.
3. Press the Save soft key to accept the change or the Back soft key to cancel.
To configure a static IPv4 address via phone user interface:
1. Press Menu->Settings->Advanced Settings (password: admin) ->Network->WAN
Port->IPv4->Static IP Client.
2. Enter the desired values in the IP Address, Subnet Mask, Default Gateway, Pri.DNS
and Sec.DNS fields respectively.
3. Press the Save soft key to accept the change or the Back soft key to cancel.
To configure a static IPv6 address via phone user interface:
1. Press Menu->Settings->Advanced Settings (password: admin) ->Network->WAN
Port->IPv6->Static IPv6 Client.
2. Enter the desired values in the IPv6 , IPv6 Prefix, IPv6 Gateway, IPv6 Pri.DNS and
IPv6 Sec.DNS fields respectively.
3. Press the Save soft key to accept the change or the Back soft key to cancel.
If you are using an xDSL modem for IPv4 network connection, you can connect your
phone to the Internet via PPPoE mode. Set the WAN port as a PPPoE port. The PPPoE port
will perform a PPP negotiation to obtain the IP address. Contact your system
administrator for the PPPoE user name and password.

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