Yealink SIP-T21P User Manual

Basic Call Features
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Auto answer is configurable via web user interface at the path Account->Basic.
Note
You can enable auto redial to redial the phone number automatically when the called
party is busy. You can also configure the times settings for auto redial and the time to
wait between redial attempts.
To configure auto redial via phone user interface:
1. Press Menu->Features->Auto Redial.
2. Press or , or the Switch soft key to select Enable from the Auto Redial field.
3. Enter the desired time in the Interval field.
The default time interval is 10s.
4. Enter the desired times in the Times field.
The default times are 10.
5. Press the Save soft key to accept the change or the Back soft key to cancel.
Auto redial is configurable via web user interface at the path Features->General
Information.
To use auto redial:
When the called party is busy, the following prompt will appear on the LCD screen of the
phone:
Auto answer is only applicable when there is no other call in progress on the phone.

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