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Yealink T5 Series IP Phones User Guide V84 10

Yealink's user guide for the Yealink SIP-T54S, covering everyday calling, contacts, voicemail and phone settings (135 pages).

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About this user guide

About the T5 Series IP Phones User Guide V84 10

Yealink's user guide for the Yealink SIP-T54S, covering everyday calling, contacts, voicemail and phone settings (135 pages). This copy, last updated by Yealink on October 22, 2025, and you can read it right here or download it.

The SIP-T54S 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.

SIP-T54S is end of life. Support options, dates and replacements

What’s inside

  1. About This Guide
  2. Related Documentation
  3. In This Guide
  4. Getting Started with Your Phone
  5. Hardware Overview
  6. T5X Series Hardware
  7. Power LED Indicator
  8. Line Key LED
  9. Screen and Icons
  10. Idle Screen
  11. Dialing/Pre-dialing Screen
  12. Calls Screen
  13. Icons in the Status Bar
  14. Line Key Icons
  15. Call History Icons
  16. Entering Characters
  17. Customizing Your Phone
  18. Changing the Administrator Password
  19. Wallpaper
  20. Changing Wallpaper on Idle Screen
  21. Adding a Wallpaper from a USB Flash Drive
  22. Adjusting Transparency
  23. Screen Saver
  24. Changing the Waiting Time for Screen Saver
  25. Enabling or Disabling Time & Date and Status Icons Display
  26. Adding a Screen Saver from a USB Flash Drive
  27. Setting the Screen Saver Type
  28. Changing the Screen Backlight Brightness and Time
  29. Changing the Language
  30. Time & Date
  31. Disabling Idle Clock Display
  32. Setting the Time and Date Manually
  33. Changing the Time and Date Format
  34. Setting a Key as Send
  35. Phone Lock
  36. Phone Lock Types and Waiting Time
  37. Setting the Phone Lock
  38. Locking Your Phone Manually
  39. Unlocking Your Phone
  40. Changing Your Phone Unlock PIN

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 SIP-T54S?

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.