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Yealink T41S&T42S-Skype for Business Edition User Guide V9.45

Yealink's user guide for the Yealink SIP-T41S and SIP-T42S, covering everyday calling, contacts, voicemail and phone settings (192 pages).

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About this user guide

About the T41S&T42S-Skype for Business Edition User Guide V9.45

Yealink's user guide for the Yealink SIP-T41S and SIP-T42S, covering everyday calling, contacts, voicemail and phone settings (192 pages). This is version 9.45, last updated by Yealink on October 21, 2025, and you can read it right here or download it.

These phones have been discontinued by Yealink, but they're still widely used, and this document is still the reference for setting them up. The Tech Team™ supports end-of-life Yealink phones and can help you plan a replacement when you're ready.

SIP-T41S is end of sale. Support options, dates and replacements

What’s inside

  1. About This Guide
  2. In This Guide
  3. Summary of Changes
  4. Changes for Release 9, Guide Version 9.45
  5. Changes for Release 9, Guide Version 9.30
  6. Overview
  7. Hardware Component Instructions
  8. Icons Instructions
  9. LED Instructions
  10. Power LED Indicators
  11. Line Key LED
  12. User Interfaces
  13. Phone User Interface
  14. Web User Interface
  15. Features Configurable via Phone/Web User Interface
  16. Documentations
  17. Getting Started
  18. Phone Initialization
  19. Signing into Skype for Business
  20. PIN Authentication
  21. User Sign-in
  22. Web Sign-In
  23. Signing in via PC
  24. Multi-factor Authentication
  25. Binding Your Mobile Phone with Online Account
  26. Passing MFA
  27. Signing Out of Skype for Business
  28. Presence Status
  29. Changing Presence Status
  30. Resetting Presence Status
  31. Idle Screen
  32. Entering Data and Editing Fields
  33. Phone Status
  34. Viewing the Phone Status
  35. Basic Network Settings
  36. Configuring the DHCP
  37. Configuring the Static IPv4 Address
  38. Configuring the Static IPv6 Address
  39. Customizing Your Phone
  40. General Settings

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-T41S?

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.