Yealink SIP-T21P User Manual

Customizing Your Phone
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5. Click Confirm to accept the change.
Note
Physically connect your headset and activate the headset mode for use. For more
information on physically connecting a headset, refer to Phone Installation on page 11.
To activate the headset mode:
1. Press on the phone.
The headset icon on the idle screen indicates that the headset mode is activated.
Press the line key or the Answer soft key to answer a call. The call will connect to
your headset automatically. Enter the desired number and press the Send soft key,
then the phone will place a call using the headset automatically. For more
information on using the headset to place a call, refer to Placing Calls on page 65.
To deactivate the headset mode:
1. Press again on the phone.
The headset icon disappears from the idle screen indicates the headset mode is
deactivated.
You can use headset in priority when enabling headset prior. This feature is especially
useful for permanent or full-time headset users.
To enable headset prior via web user interface:
1. Click on Features->General Information.
The logo file format must be *.dob, contact your system administrator for more
information.
Logo customization is configurable via web user interface only.

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