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Yealink SIP-T21P User Manual

Yealink SIP-T21P
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User Guide for the SIP-T21P IP Phone
104
automatically answer an incoming intercom call while there is already an active call on
the phone, the active call is placed on hold.
Intercom features you need to know:
Intercom Feature
Description
Accept Intercom
Enable or disable the IP phone to automatically
answer an incoming intercom call.
Intercom Mute
Enable or disable the microphone on the IP phone for
intercom calls.
Warning Tone
Enable or disable the IP phone to play a warning
tone when it receives an incoming intercom call.
Intercom Barge
Enable or disable the IP phone to automatically
answer an incoming intercom call while there is
already an active call on the phone.
To configure intercom features via phone user interface:
1. Press Menu->Features->Intercom.
2. Make the desired changes (Press or to switch between different intercom
features).
3. Press the Save soft key to accept the change or the Back soft key to cancel.
These specific parameters are configurable via web user interface at the path
Features->Intercom.
Accept Intercom
You can enable or disable the phone to automatically answer an incoming intercom call.
If Accept Intercom is enabled, the phone automatically answers an incoming intercom
call. If Accept Intercom is disabled, the phone rejects incoming intercom calls and sends
a busy message to the caller. Accept Intercom is enabled by default.
Note
Intercom Mute
You can mute or un-mute the microphone on the phone for intercom calls automatically.
If Intercom Mute is enabled, the microphone is muted for intercom calls. If Intercom
Your administrator can set a delay time before the phone automatically answers
intercom calls. Contact your system administrator for more information.

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Yealink SIP-T21P Specifications

General IconGeneral
Display132 x 64-pixel graphical LCD
Network10/100 Mbps Ethernet
SIP Accounts2
Wall MountableYes
Audio FeaturesHD Voice
ProtocolsSIP v1 (RFC2543), v2 (RFC3261)
Voice CodecsG.711(A/μ), G.729AB, G.726, G.722
Phonebook1000 entries
Call FeaturesCall hold, call waiting, call transfer, call forward, 3-way conferencing
SecuritySRTP, TLS, 802.1x, HTTPS
Ethernet Ports2 x RJ45 10/100 Mbps
Power SupplyPower over Ethernet (PoE) or optional power adapter
Operating Humidity10% to 90% (non-condensing)
LanguagesSupports multiple languages
PoEYes (802.3af)
Operating Temperature-10°C to 50°C

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