Yealink Yealink SIP-T42G User manual

Version 1
Yealink SIP-T42G IP Phone
User Guide

User Guide for SIP-T42G IP Phone 2
E Mark Warning
This device is marked with the CE mark in compliance with EC Directives 2014/35/EU and 2014/30/EU.
Part 15 FCC Rules
Any Changes or modifications not expressly approved by the party responsible for compliance could void the
user’s authority to operate the equipment. This device complies with Part 15 of the FCC Rules. Operation is
subject to the following two conditions:
1. This device may not cause harmful interference, and
2. This device must accept any interference received, including
interference that may cause undesired operation.
Class B Digital Device or Peripheral
Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant
to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful
interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy
and, if not installed and used in accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not occur in a particular installation. If
this equipment does cause harmful interference to radio or television reception, which can be determined by
turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the
following measures:
1. Reorient or relocate the receiving antenna.
2. Increase the separation between the equipment and receiver.
3. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
4. Consult the dealer or an experienced radio/TV technician for help.
WEEE Warning
To avoid the potential effects on the environment and human health as a result of the presence of
hazardous substances in electrical and electronic equipment, end users of electrical and electronic
equipment should understand the meaning of the crossed-out wheeled bin symbol. Do not dispose
of WEEE as unsorted municipal waste and have to collect such WEEE separately.

User Guide for SIP-T42G IP Phone 3
GNU GPL Information
Yealink SIP-T42G IP phone firmware contains third-party software under the GNU General Public License (GPL).
Yealink uses software under the specific terms of the GPL. Please refer to the GPL for the exact terms and
conditions of the license.
The original GPL license, source code of components licensed under GPL and used in Yealink products can be
downloaded online:
http://www.yealink.com/GPLOpenSource.aspx?BaseInfoCateId=293&NewsCateId=293&CateId=293.
About This Guide
Thank you for choosing the SIP-T42G IP phone, an ultra-elegant Gigabit IP phone which is exquisitely designed
to provide business telephony features, such as Call Hold, Call Transfer, Busy Lamp Field, Multicast Paging and
Conference over an IP network.
This guide provides everything you need to quickly use your new phone. First, verify with your system
administrator that the IP network is ready for phone configuration. Also be sure to read the Packaging Contents
and Regulatory Notices sections in this guide before you set up and use the SIP-T42G IP phone.

User Guide for SIP-T42G IP Phone 4
About This Guide
Thank you for choosing the SIP-T42G IP phone, an ultra-elegant Gigabit IP phone which is exquisitely designed
to provide business telephony features, such as Call Hold, Call Transfer, Busy Lamp Field, Multicast Paging and
Conference over an IP network.
This guide provides everything you need to quickly use your new phone. First, verify with your system
administrator that the IP network is ready for phone configuration. Also be sure to read the Packaging Contents
and Regulatory Notices sections in this guide before you set up and use the SIP-T42G IP phone.

User Guide for SIP-T42G IP Phone 5
Table of Contents
GNU GPL Information.............................................................................................. 3
About This Guide..................................................................................................... 4
Overview................................................................................................................. 7
Hardware Compenent Instructions..................................................................................................................... 7
Icon Instructions.................................................................................................................................................. 9
LED Instructions................................................................................................................................................ 11
Getting Started ..................................................................................................... 13
Packaging Contents .......................................................................................................................................... 13
Phone Installation ............................................................................................................................................. 14
Phone Initialization............................................................................................................................................ 16
Phone Status ..................................................................................................................................................... 17
Entering Data and Editing Fields ...................................................................................................................... 17
Customizing Your Phone ....................................................................................... 20
General Settings................................................................................................................................................ 20
Audio Settings ................................................................................................................................................... 22
Contact Management ........................................................................................................................................ 24
Directory ............................................................................................................................................................ 24
Local Directory .................................................................................................................................................. 24
Blacklist............................................................................................................................................................. 30
Call History Management.................................................................................................................................. 31
System Customizations..................................................................................................................................... 33
Hotline ............................................................................................................................................................... 34
Basic Call Features............................................................................................... 35
Placing Calls...................................................................................................................................................... 35
Answering Calls ................................................................................................................................................ 36
Ending Calls....................................................................................................................................................... 37
Redialing Numbers ........................................................................................................................................... 38
Auto Answer ...................................................................................................................................................... 39

User Guide for SIP-T42G IP Phone 6
Auto Redial ........................................................................................................................................................ 39
Call Mute ........................................................................................................................................................... 40
Call Hold/Resume ............................................................................................................................................. 40
Do Not Disturb (DND)........................................................................................................................................ 41
Call Forward ...................................................................................................................................................... 42
Call Transfer...................................................................................................................................................... 47
Call Waiting........................................................................................................................................................ 48
Conference ........................................................................................................................................................ 48
Call Park............................................................................................................................................................ 49
Call Pickup......................................................................................................................................................... 50
Anonymous Call................................................................................................................................................. 50
Anonymous Call Rejection ................................................................................................................................ 51
Advanced Phone Features .................................................................................... 52
Messages........................................................................................................................................................... 52
Voice Mail........................................................................................................................................................... 52
Message Waiting Indicator (MWI)...................................................................................................................... 53
Troubleshooting.................................................................................................... 54
General Issues................................................................................................................................................... 54
Display Issues.................................................................................................................................................... 54
Call Issues ......................................................................................................................................................... 54
Headset & Handset Issues................................................................................................................................ 55
Regulatory Notices ............................................................................................... 56
Service Agreements .......................................................................................................................................... 56
Limitations of Liability....................................................................................................................................... 56
Safety Instructions ............................................................................................................................................ 56
Appendix A - Time Zones ...................................................................................... 58

User Guide for SIP-T42G IP Phone 7
Overview
This chapter provides the overview of the SIP-T42G IP phone.
Hardware Compenent Instructions
The main hardware components of the SIP-T42G IP phone are the LCD screen and the keypad.

User Guide for SIP-T42G IP Phone 8
Hardware component instructions of the SIP-T42G IP phone are:
Item Description
1 LCD Screen
Shows information about calls, messages, soft keys, time, date and other
relevant data:
• Call information—caller ID, call duration
• Icons (for example, )
• Missed call text or second incoming caller information
• Prompt text (for example, “Saving config file!”)
• Time and date
2 Power Indicator LED
Indicates phone power and some feature statuses.
• Receives an incoming call—fast flashing
• Receives a voice mail or text message, slow flashing
3Line Keys Use these keys to activate up to twelve lines and assign various features.
4
(Mute Key) Toggles and indicates mute feature.
(Headset Key) Toggles and indicates the headset mode.
(Message Key) Accesses voice mails.
(Redial Key) Redials a previously dialed number.
5 Speakerphone Key Toggles and indicates the hands-free speakerphone mode.
6 Volume Key Adjusts the volume of the handset, headset, speaker, and ringer.
7 Keypad Provides the digits, letters, and special characters in context-sensitive
applications.
8
Scroll through the displayed information.
Confirms actions or answers incoming calls.
Cancels actions or rejects incoming calls.

User Guide for SIP-T42G IP Phone 9
9 Soft Keys Label automatically to identity their context-sensitive features.
10 Speaker Provides hands-free (speakerphone) audio output.
11 Hookswitch Tab
Secures the handset in the handset cradle when the IP phone is mounted
vertically. For more information on how to adjust the hookswitch tab, refer
to Yealink Wall Mount Quick Installation Guide for Yealink IP Phones.
12 Hookswitch
Picking up the handset from the handset cradle, the hookswitch bounces
and the phone connects to the line, laying the handset down on the
handset cradle, the phone disconnects from the line.
Icon Instructions
Icons appearing on the LCD screen are described in the following table:
Icon Description
Network is unavailable
The line registers successfully
Registration failed
Registering
The shared/bridged line registers successfully
Hands-free speakerphone mode
Handset mode
Headset mode
Voice Mail

User Guide for SIP-T42G IP Phone 10
Auto Answer
Do Not Disturb
Call Hold
Call Mute
Ringer volume is 0
Phone Lock
Call Forward/Forwarded Calls
Missed Calls
Received Calls
Placed Calls
Recording box is full
A call cannot be recorded
Recording starts successfully
Recording cannot be started
Recording cannot be stopped
The contact icon

User Guide for SIP-T42G IP Phone 11
LED Instructions
Power Indicator LED
LED Status Description
Solid red The phone is initializing.
Fast flashing red (300ms) The phone is ringing.
Slow flashing red (1s) The phone receives a voice mail.
Off
The phone is powered off.
The phone is idle.
The phone is busy.
The call is placed on hold or is held.
The call is muted.
Line key LED
LED Status Description
Solid green The line is seized.
The line is in conversation.
Fast flashing green The line receives an incoming call.
Slow flashing green The call is placed on hold.
Off The line is inactive.
Line key LED
(configured as a BLF key or BLF List key)
LED Status Description
Solid green The monitored user is idle.
Fast flashing red (200ms) The monitored user receives an incoming call.

User Guide for SIP-T42G IP Phone 12
Solid red
The monitored user is busy.
The monitored user’s conversation is placed on hold
(This LED status requires server support).
Slow flashing red (1s) The call is parked against the monitored user’s phone number.
Off The monitored user does not exist.

User Guide for SIP-T42G IP Phone 13
Getting Started
This chapter provides the following basic installation instructions and information for obtaining the best
performance with the SIP-T42G IP phone.
Packaging Contents
The following components are included in your SIP-T42G IP phone package:
• SIP-T42G IP Phone
• Phone Stand

User Guide for SIP-T42G IP Phone 14
• Handset & Handset Cord
• Power Adapter
• Ethernet Cable
• Quick Start Guide
Check the list before installation. If you find anything missing, contact your system administrator.
Phone Installation
This section introduces how to install the phone:
1. Attach the stand
2. Connect the handset and optional headset
3. Connect the network and power

User Guide for SIP-T42G IP Phone 15
1) Connect the handset and optional headset
Note EHS36 is used for connecting the phone and a compatible wireless headset. For more
information on how to use EHS36, refer to Yealink EHS36 User Guide.
2) Connect the network and power
You have two options for power and network connections. Your system administrator will advise you which one to
use.
• AC power (Optional)
• Power over Ethernet (PoE)
AC Power (Optional)
To connect the AC power:
1. Connect the DC plug on the power adapter to the DC5V port on the phone and
connect the other end of the power adapter into an electrical power outlet.
2. Connect the included or a standard Ethernet cable between the Internet
port on the phone and the one on the wall or switch device port.

User Guide for SIP-T42G IP Phone 16
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.
Power over Ethernet
With the included or a regular Ethernet cable, the SIP-T42G IP phone can be powered from a PoE-compliant
switch or hub.
To connect the PoE:
1. Connect the Ethernet cable between the Internet port on the phone
and an available port on the in-line power switch.
Note If in-line power is provided, you don’t need to connect the phone to the power adapter. Make
sure the switch/hub is PoE-compliant.
The phone can also share the network with another network device such as a PC (personal
computer). This is an optional connection.
Important! Do not remove power from the phone while it is updating firmware and
configurations.
Phone Initialization
After your phone is powered on, the system boots up and performs the following steps:
Automatic Phone Initialization
The phone finishes the initialization by loading the saved configuration. The LCD screen displays “Welcome
Initializing…please wait” during this process.

User Guide for SIP-T42G IP Phone 17
DHCP (Dynamic Host Configuration Protocol)
The phone attempts to contact a DHCP server in your network to obtain valid IPv4 network settings (e.g., IP
address, subnet mask, default gateway address and DNS address) by default.
Note If your network does not use DHCP, contact your system administrator.
Phone Status
You can view phone status via phone user interface. Available information of phone status includes:
• Network status (e.g., IPv4 status, IP mode, MAC address).
• Phone status (e.g., product name, hardware version, firmware version, product ID, MAC address and
device certificate status).
• Account status (e.g., register status of SIP account).
To view the phone status via phone user interface:
1. Press , or press Menu->Status.
2. Press or to scroll through the list and view the specific information.
Idle Screen
If the phone has successfully started up, the idle LCD screen will be displayed as below.
The idle screen displays the label of the current account, time and date, and four soft keys.
Entering Data and Editing Fields
You can enter data and edit fields using the phone keypad.
Keypad on the phone provides different characters (or numbers) when using the 2aB, abc, Abc, ABC or 123 input
mode. You can change the following input modes to enter data and edit fields on your phone. When your phone

User Guide for SIP-T42G IP Phone 18
keypad matches the input mode, you can press the keypad repeatedly to view the character (or numbers) options
and stop to select. When the character (or numbers) you want to enter displays in the field, wait one second, and
enter the next character (or numbers).
The following table lists the input modes and character (or numbers) options for the keypad:
Input Mode
Keypad
2aB abc Abc
(initials in capitals)
ABC 123
1 1
2abcABC abc2äæå
àáâãç
abc2äæå
àáâãç
ABC2ÄÆÅ
ÀÁÂÃÇ 2
3defDEF def3èéêë
ð
def3èéêë
ð
DEF3ÈÉÊË
Ð
3
4ghiGHI ghi4ìíîï ghi4ìíîï GHI4ÌÍÎÏ 4
5jklJKL jkl5£ jkl5£ JKL5£ 5
6mnoMN O mno6öøò
óôõñ
mno6öøò
óôõñ
MNO6ÖØ
ÒÓÔÕÑ 6
7pqrsPQR S pqrs7ßS pqrs7ßS PQRS7S 7
8tuvTUV tuv8ùúûü tuv8ùúûü TUV8ÙÚÛ
Ü
8
9wxyzWX YZ wxyz9ýÞ wxyz9ýÞ WXYZ9ÝÞ 9
0 space space space 0
*.,’?!\-()@/:
_;+&%=<
>
£$¥¤[]{}
~^¡¿§#”|
*.,’?!\-()@/:
_;+&%=<
>
£$¥¤[]{}
~^¡¿§#”|
*.,’?!\-()@/:
_;+&%=<
>
£$¥¤[]{}
~^¡¿§#”|
*.,’?!\-()@/:
_;+&%=<
>
£$¥¤[]{}
~^¡¿§#”|
.*:/@[]
# # # # #

User Guide for SIP-T42G IP Phone 19
To enter or edit data:
Do one of the following:
If you want to Then you can
Enter only digits
(1), uppercase
(A) characters,
lowercase (a)
characters, or
alphanumeric (2aB)
characters.
Press a keypad key one or more times (depending what input mode you’re in) to
enter the characters that is displayed on the keypad key.
You can press the abc soft key one or more times to switch among uppercase
(ABC soft key), numeric (123 soft key), alphanumeric (2aB soft key), uppercase and
lowercase (Abc soft key) and lowercase (abc soft key) input modes.
For example, if the input mode is ABC:
• To enter “A”, press once.
• To enter “B”, press twice quickly.
• To enter “C”, press three times quickly.
• To enter “2ÄÆÅÀÁÂÃÆ”, press more than three times quickly.
Note: When you are in the uppercase (ABC soft key), uppercase and lowercase
(Abc soft key) or lowercase (abc soft key) input mode, is not available.
Enter special
characters. Press the keypad key or , or press .
For Key:
If it is in the uppercase (ABC soft key), uppercase and lowercase (Abc soft key) or
lowercase (abc soft key) input mode, it will provide the space character.
If it is in the numeric (123 soft key) or alphanumeric (2aB soft key) input mode, it will
only provide the digit 0.
For key:
It only provides the pound character #.
For key:
If it is in the uppercase (ABC soft key),lowercase (abc soft key), uppercase and
lowercase (Abc soft key) or alphanumeric (2aB soft key) input mode, it will provide
the following special characters: *.,?!\-()@/:_;+&%=<>£$¥¤[]{}~^¡¿§#”|.
If it is in the numeric (123 soft key) input mode, it will provide the following special
characters: .*:/@[].
Delete text you entered. Press or to position the cursor to the right of the text you want to delete,
and then press the Delete soft key to delete one character at a time.

User Guide for SIP-T42G IP Phone 20
Customizing Your Phone
You can customize your SIP-T42G IP phone by personally configuring certain settings, for example, time & date
and ring tones. You can add contacts to the phone’s local directory manually or from call history. You can also
personalize different ring tones for different callers.
General Settings
Back Light
You can configure the backlight to adjust the brightness of the LCD screen. Backlight status on the LCD screen
can be configured from the following options:
• Always On: Backlight is on permanently.
• Always Off: Backlight is off permanently.
• 15s, 30s, 60s, 120s, 300s, 600s or 1800s: Backlight is turned off when the phone is inactive after the
designated time (in seconds).
To configure the backlight via phone user interface:
1. Press Menu->Settings->Basic Settings->Display->Backlight.
2. Press or , or the Switch soft key to select the desired time from the Backlight Time field.
3. Press the Save soft key to accept the change or the Back soft key to cancel.
Language
The default language of the phone user interface is English.
To change the language for the phone user interface:
1. Press Menu->Settings->Basic Settings->Language.
2. Press or to select the desired language.