T42S
Ultra-elegant Gigabit IP Phone
SIP-T42S
www.yealink.com
Quick Start Guide
(V81.1)
Packaging Contents
The following items are included in your package. If you find anything missing, contact your system administrator.
IP Phone
T42S
Handset
Handset Cord
Quick Start Guide
Ethernet Cable
Power Adapter
（Optional）
Stand
Wall Mount Bracket
（Optional）
Note: We recommend that you use the accessories provided or approved by Yealink. The use of unapproved
third-party accessories may result in reduced performance.
Assembling the Phone
Assembling the Phone
1. Attach the stand, as shown below:
AAA
404040
BBB
454545
Desk Mount Method
Note: You can also mount the phone to a wall. For more information on how to attach the wall mount bracket, refer
to Yealink Wall Mount Quick Installation Guide for
Yealink IP Phones
.
2. Connect the handset and optional headset, as shown below:
EHS36
Wireless Headset Adapter EHS36
Note: The headset or wireless headset adapter EHS36 should be purchased separately. EHS36 is used for
connecting the phone and a compatible wireless headset. For more information on how to use the EHS36,
refer to Yealink EHS36 User Guide.
1
3. Connect the USB flash driver, as shown below:
Note: The USB port can also be used to connect the Bluetooth USB dongle BT40 or USB headset. The USB flash
driver, BT40 and USB headset should be purchased separately. For more information on how to use the
BT40, refer to Yealink Bluetooth USB Dongle BT40 User Guide.
4. Connect the network and power, as shown below:
You have two options for network and power connections. Your system administrator will advise you which one to use.
PC Connection
(Optional)
A
AC Power Option
B
PoE ( Power over
Ethernet ) Option
PC Connection
(Optional)
Note:
The IP phone should be used with Yealink original power adapter (5V/1.2A) only. The use of the third-party
power adapter may cause the damage to the phone.
If inline power (PoE) is provided, you don’t need to connect the power adapter. Make sure the hub/switch is
PoE-compliant.
Power Adapter
(DC 5V)
IEEE 802.3af compliant
PoE Hub/Switch
2
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