Yealink T42S User Manual

Yealink T4 Series IP Phones User Guide
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Multicast Paging
Multicast Paging allows you to broadcast instant audio announcements to users who are listening to a specific mul-
ticast group on a specific channel.
The phone supports the following 31 channels:
l 0: Broadcasts are sent to channel 0. Note that the Yealink IP phones running firmware version 80 or earlier can be
regarded as listening to channel 0. It is the default channel.
l 1 to 25: Broadcasts are sent to channel 1 to 25. We recommend that you specify these channels when broadcasting
with Polycom IP phones which have 25 channels you can listen to.
l 26 to 30: Broadcasts are sent to channel 26 to 30. We recommend that you specify these channels when broad-
casting with Yealink IP phones running firmware version 81 or later.
Note
All IP phones in the multicast paging group must be deployed in the same subnet since a broadcast is used. The phone can
only send/receive broadcasts to/from the listened channels. Other channels’ broadcasts will be ignored automatically by
the IP phone.
Topics
Sending Multicast Paging
Receiving Multicast Paging
Managing a Paging Call
Sending Multicast Paging
Your phone supports up to 31 groups for paging. You can assign a label to each group to identify the phones in the
group, such as All, Sales, or HR.
You can set a line key as Multicast Paging key or Paging List key on the phone, which allows you to send announce-
ments to the phones with pre-configured multicast address(es) on specific channel(s).
Note
Multicast RTP is one way only from the sender to the multicast address(es) (receiver). For outgoing RTP multicasts, all other
existing calls on the phone will be placed on hold.
Topics
Setting a Multicast Paging Key
Setting a Paging List Key
Sending Pages by a Paging List Key
Setting a Paging Group
Sending a Paging by a Multicast Paging Key
Deleting a Paging Group
Setting a Multicast Paging Key
You can set a Multicast Paging key for a paging group, which allows you to send announcements quickly on the idle
screen.
Before You Begin
Get the multicast IP address and port number from your system administrator.
Procedure

Yealink T42S Specifications

General

Manual	Yes
Cables included	LAN (RJ-45)
Number of handles included	1 pc(s)
Lines quantity	12 lines
Phonebook capacity	1000 entries
Number of VoIP accounts	12
Mounting	Desk/Wall
Handset type	Wired handset
Product type	IP Phone
Product color	Black
Voice codecs	CNG, G.711Mu, G.711a, G.723.1, G.726, G.729ab, VAD, iLBC
Operating temperature (T-T)	-10 - 50 °C
Operating relative humidity (H-H)	10 - 95 %
Display diagonal	2.7 \
Display resolution	192 x 64 pixels
AC adapter input voltage	100 - 240 V
AC adapter output current	1.2 A
AC adapter output voltage	5 V
Dual-Tone Multi-Frequency (DTMF) modes	In-band, Out-of band, SIP info
Volume control	Digital
Number of programmable keys	6
USB 2.0 ports quantity	1
Ethernet LAN (RJ-45) ports	2
Networking standards	IEEE 802.3af
Ethernet LAN data rates	10, 100 Mbit/s
Ethernet LAN interface type	Fast Ethernet
Supported network protocols	SIP v1, SIP v2, LLDP/CDP/DHCP, OpenVPN, IEEE802.1X, IPv6, FTP/TFTP/HTTP/HTTPS

Weight and Dimensions

Depth	189 mm
Width	212 mm
Height	175 mm
Package depth	223 mm
Package width	246 mm
Package height	120 mm