Yealink user guide
Yealink MP54&T55A Skype for Business Edition User Guide V9.17
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About this user guide
About the MP54&T55A Skype for Business Edition User Guide V9.17
Yealink's user guide for the Yealink T55A Skype for Business, covering everyday calling, contacts, voicemail and phone settings (97 pages). This is version 9.17, last updated by Yealink on November 3, 2025, and you can read it right here or download it.
The T55A Skype for Business has been discontinued by Yealink, but it's still widely used, and this document is still the reference for setting it up. The Tech Team™ supports end-of-life Yealink phones and can help you plan a replacement when you're ready.
T55A Skype for Business is end of life. Support options, dates and replacementsWhat’s inside
- About This Guide
- Related Documentations
- Getting Started
- T55A Hardware
- MP54 Hardware
- Overview of Phone Screens
- Idle Screen
- Dialing Screen
- Favorites Screen
- History Screen
- Contacts Screen
- Calls Screen
- Icon Introductions
- Icons in the Status Bar
- Icons in the Main Window
- LED Instructions
- Power Indicator LED
- Entering Data and Editing Fields
- Using the Onscreen Keyboard
- Using the Onscreen Dial Pad
- Using the Phone Keypad
- Signing into and Locking Your Phone
- Multi-Factor Authentication (MFA)
- Binding Online Account with Your Mobile Phone Number
- Passing Multi-Factor Authentication
- Signing into Your Phone
- Sign in Using Your Skype for Business User Credentials
- Sign in Using BToE
- Sign in Using Your PIN Authentication Credentials
- Sign in Using Web
- Signing out of the Phone
- Using a Common Area Phone (CAP)
- Setting a Common Area Phone
- Signing into a Common Area Phone
- Signing out of the Common Area Phone
- Using Hot Desking Feature
- Sign in as a Guest User
- Signing out of the Guest User
- Disabling Hot Desking
- Phone Lock
Phones covered
Yealink phones this user guide covers
FAQ
Questions about this document
Quick answers, and The Tech Team™ is a call away if you need more.
Need help with your T55A Skype for Business?
The Tech Team™ can provision, update and troubleshoot your Yealink phones, and move your office onto smplVoice cloud voice.
Yealink and Yealink product names are trademarks of Yealink Network Technology Co., Ltd. Product information, images and documents are published by Yealink and provided here for reference by smplVoice. Firmware and documents are Yealink’s original, unmodified files.


