Yealink T27P Administrator's Guide

Configuring Basic Features
181
A user can activate or deactivate DND using the DND key or DND soft key. The
server-side DND feature disables the local DND and call forward settings. If the
server-side DND feature is enabled on any of the IP phone’s registrations, the other
registrations are not affected. For more information on call forward, refer to Call
Forward on page 208.
The DND on code and DND off code configured on IP phones are used to
activate/deactivate the server-side DND feature. They may vary on different servers.
Return Message When DND
This feature defines the return code and the reason of the SIP response message for the
rejected incoming call when DND is enabled on the IP phone. The caller’s phone LCD
screen displays the received return code.
Procedure
DND can be configured using the configuration files or locally.
Configuration File
<MAC>.cfg
Configure DND in the custom
mode.
Parameters:
account.X.dnd.enable
account.X.dnd.on_code
account.X.dnd.off_code
<y0000000000xx>.cfg
Assign a DND key.
Parameters:
linekey.X.type/
programablekey.X.type
Configure the DND mode.
Parameter:
features.dnd_mode
Configure DND in the IP phone
mode.
Parameters:
features.dnd.enable
features.dnd.on_code
features.dnd.off_code
Specify the return code and the
reason of the SIP response
message when DND is enabled.
Parameter:
features.dnd_refuse_code

Yealink T27P Specifications

General

Wall Mountable	Yes
Local Phonebook	1000 entries
Bluetooth	No
Wi-Fi	No
Gigabit Ethernet	No
Display	3.66" 240x120 pixel graphical LCD with backlight
Audio Features	HD voice, Full-duplex speakerphone
Network	Dual-port 10/100 Ethernet switch
Protocols	SIP v1 (RFC2543), v2 (RFC3261)
Power	IEEE 802.3af PoE
Connectivity	2 x RJ45 10/100M Ethernet ports
Voice Codecs	G.711(A/μ), G.722, G.723, G.729AB, G.726
EHS	Supports EHS with Plantronics headsets
Headset Port	Yes
Power Adapter	5V DC (optional)