Yealink T27P Administrator's Guide

Administrator’s Guide for SIP-T2_Series_T4_Series IP Phones
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Users can send an RTP stream without involving SIP signaling by pressing a configured
multicast paging key or a paging list key. A multicast address (IP: Port) should be
assigned to the multicast paging key, which is defined to transmit RTP stream to a group
of designated IP phones. When the IP phone sends the RTP stream to a pre-configured
multicast address, each IP phone preconfigured to listen to the multicast address can
receive the RTP stream. When the originator stops sending the RTP stream, the
subscribers stop receiving it.
Procedure
Configuration changes can be performed using the configuration files or locally.
Configuration File
<y0000000000xx>.cfg
Specify a multicast codec for the IP
phone to use for multicast RTP.
Parameter:
multicast.codec
Assign a multicast paging key.
Parameters:
linekey.X.type
linekey.X.value
Assign a paging list key.
Parameter:
linekey.X.type
Configure the multicast IP address
and port number for a paging list
key.
Parameter:
multicast.paging_address.X.ip_ad
dress
Configure the multicast paging
group name for a paging list key.
Parameter:
multicast.paging_address.X.label
Local
Web User Interface
Assign a multicast paging key or a
paging list key.
Navigate to:
http://<phoneIPAddress>/servlet?p
=dsskey&q=load&model=0
Specify a multicast codec for the IP

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)