Yealink SIP-T21P User Manual

User Guide for the SIP-T21P IP Phone
134
Message Waiting Indicator 114
Multicast Paging 105
Music on Hold 108
N
Network Conference 87
Network Connection 11
No answer Forward 78
O
Outgoing Intercom Calls 103
Overview 1
P
Packaging Contents 9
Phone Initialization 13
Phone Installation 11
Phone Status 13
Phone User Interface 5
Placing Calls 65
Placing Calls to Contacts 34
Programmable Keys 53
R
Receiving RTP Stream 107
Recent Call In Dialing 69
Redialing Numbers 69
Registration 16
Regulatory Notices 129
Remote Phone Book 40
Replace Rule 56
Ring Tones 25
S
Safety Instructions 129
Search Source List in Dialing 35
Searching for Contacts 35
Semi-attended Transfer 84
Sending RTP Stream 105
Service Agreements 129
Short Message Service (SMS) 111
System Customizations 44
T
Time and Date 19
Time Zones 131
Troubleshooting 119
V
Voice Mail 113
Volume 24
W
Warranty ii
Web User Interface 5
WEEE Warning iii

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