Yealink SIP-T21P User Manual

Customizing Your Phone
49
DTMF
You can use this key feature to send the specification of arbitrary key sequences via
DTMF.
Dependencies: Type (Key Event)
Key Type (DTMF)
Value (DTMF sequence)
Usage: Press the DSS key during an active call to send the key sequence specified in the
Value field.
Note
Prefix
You can use this key feature to add a specified prefix number before the dialed number.
Dependencies: Type (Key Event)
Key Type (Prefix)
Value (the prefix number)
Usage: Press the DSS key when the phone is idle, then the phone will enter into the
dialing screen and display the prefix number which you specified in the Value field. You
can enter other digits and then dial out.
Local Group
You can use this key feature to access the group in the local directory quickly. For more
information, refer to Local Directory on page 28.
Dependencies: Type (Key Event)
Key Type (Local Group)
Local Group (the group you want to access)
Usage: Press the DSS key to access the group specified in the Local Group field.
XML Group
You can use this key feature to access the remote group in your corporate directory
quickly. You should configure remote phone book in advance. For more information,
refer to Remote Phone Book on page 40.
Dependencies: Type (Key Event)
Key Type (XML Group)
Phone Book Name (the remote group you want to access if the remote
phone book is configured)
Usage: Press the DSS key to access the remote group specified in the Phone Book Name
field.
DTMF sequence only contains "0-9", "*", "#" and "A-D".

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