888 / 955 / 5155 hellospoke.comYealink T55ADUAL REGISTEREDOFFICIAL USER GUIDE

Yealink T55A Official User Manual

Introduction

Recommended References

Loading the ROM File

Verifying Startup

Importing license Configuration

IP Addressing Mode Configuration

IPv6 Configuration

DHCP Option for IPv4

DHCP Option 160 and Option 161

DHCP Option 42 and Option 2

DHCP Option for IPv6

LLDP Configuration

Manual VLAN Configuration

DHCP VLAN

Wi-Fi

Internet Port and PC Port

x Authentication

Phone Provisioning

Configuration Files

Resource Files

Files Download Process

Manual Provisioning

Central Provisioning

Setting Up a Provisioning Server

Supported Provisioning Protocols

Configuring a Provisioning Server

Provisioning Phone on the Microsoft Teams & Skype for Business Admin Center

Customizing the Displayed Elements of Devices

Diagnostic Devices

Configuration Profiles Management

Assigning Configuration Profile to Devices

Firmware Upgrade Configuration

Language Display Configuration

Language Customization

Example: Setting a Custom Language for Phone Display

Backlight

Backlight Brightness and Time Configuration

Time Zone

NTP Settings

DST Settings

Time and Date Manual Configuration

Tones

Tones Configuration

Power Saving

Power LED Indicator

Power LED Indicator Configuration

Bluetooth Configuration

User and Administrator Identification Configuration

User Access Level Configuration

Transport Layer Security (TLS)

Supported Trusted and Server Certificates

TLS Configuration

Encrypting Configuration Files

Configuration Files Encryption and Decryption

Example: Encrypting Configuration Files

Hybrid Mode

SIP Account Registration Configuration

Account Codec Configuration

Local Directory Configuration

Troubleshooting Methods

Syslog Log

Packets Capture

Ethernet Software Capturing Configuration

Analyzing Configuration Files

Exporting All the Diagnostic Files

Viewing the Phone Status

Resetting the phone to Custom Factory Settings

Phone Reboot

Enabling the Screen Capture via Phone User Interface

Troubleshooting Solutions

Specific format in configuring IPv6 on Yealink IP phones

Firmware and Upgrading Issues

Restore the administrator password

T55A Teams