Yealink SIP-T42S User Manual

User Guide for the SIP-T42S IP Phone
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The LCD screen displays the amount of new and old voice mails.
2. Select an account and then press the Connect soft key to listen to voice mails.
Message Waiting Indicator (MWI)
The SIP-T42S IP phone supports MWI feature when receiving a new voice message. If someone
leaves you a voice mail, you will receive a message waiting indicator. MWI will be indicated in
three ways: a warning tone, an indicator message (including a voice mail icon) on the LCD screen,
and the power indicator LED slowly flashes red. This will be cleared when you retrieve all voice
mails or delete them.
The MWI service is unsolicited for some servers, so the SIP-T42S IP phone only handles the MWI
messages sent from the server. But for other servers, the MWI service is solicited, so the
SIP-T42S IP phone must enable subscription for MWI.
Note
The MWI subscription parameters you need to know:
Options
Description
Subscribe for MWI
Enable or disable a subscription for MWI service.
MWI Subscription Period
Period of MWI subscription. The IP phone sends a refresh
SUBSCRIBE request before initial SUBSCRIBE expiration.
Subscribe MWI To Voice
Mail
Enable or disable a subscription to the voice mail number
for MWI service.
To use this feature, you should also configure the voice
mail number.
Note
To configure subscribe for MWI via web user interface:
1. Click on Account->Advanced.
2. Select the desired account from the pull-down list of Account.
MWI service is not available on all servers. Contact your system administrator for more
information.
The phone will send SUBSCRIBE messages for the MWI service to the account or the voice
number MWI service depending on the server. Contact your system administrator for more
information.

Yealink SIP-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