New Yealink Redirection Service: What do SwyxON customers need to bear in mind?

The information in this article applies to the following products:

• Yealink Desktop Phone T41S
• Yealink Desktop Phone T42S
• Yealink Desktop Phone T46S
• Yealink Desktop Phone T48S
• Yealink Conference Phone CP925
• Yealink Conference Phone CP965 (WiMi)
• SwyxON 
• AddOn "Swyx RemoteConnector for Yealink"

SUMMARY

On January 1st, 2026, Yealink will launch a new redirection server (RPS) that will play a key role in the initial provisioning (‘auto-provisioning’) of Yealink phones in the SwyxON context. 
This modernisation of the Yealink backend has no further consequences for the provisioning of phones from the current T3 and T5 series, but for phones from the legacy T4 series, it must be ensured that the current firmware 66.85.133.13 is installed on the phones.

Note: The new RPS only comes into effect when a telephone is set up for the first time, e.g. after a factory reset. Telephones already connected to a SwyxON tenant will continue to function.

This article describes which telephones are affected and to what extent, and provides corresponding workarounds.

INFORMATION

The Yealink Redirection Server (RPS) is essential for commissioning (‘zero-touch provisioning’) a Yealink telephone on SwyxOn. When commissioning a new device, e.g. after a factory reset, the telephones contact the Yealink RPS via a URL contained in the firmware and receive the necessary information (provisioning URL) for their SwyxON tenant. Customers with an on-prem Swyx installation (SwyxFlex, Swyx purchase) do not use the RPS, as the telephones find their server using a different mechanism.

The RPS has no effect on the normal operation of the telephones on Swyx, not even when a user logs in or out, for example. The RPS only comes into play when setting up a new telephone, e.g. after a factory reset or when activating the remote connector for Yealink.

Yealink introduced a new RPS during the course of the year, which can be accessed via a new URL and is (still) running in parallel with the old RPS. For security reasons, however, the outdated RPS will be switched off on 1 January 2026.

Older Yealink phones that do not know the URL of the new RPS and/or do not meet the current security requirements of the new RPS will then no longer be able to obtain their provisioning URL via Yealink RPS and will therefore no longer be able to connect automatically to SwyxON.

This change affects the T4S family of telephones approved for use with Swyx, as well as the old CP920 and CP960 conference telephones.

Current portfolio products are NOT affected: The T31G, the T5 desktop telephone series, the CP925 and CP965 conference phones, and the AX83H and AX86R WiFi handsets are compatible with the new RPS and also meet the increased security requirements.

To ensure that old Yealink telephones can continue to be auto-provisioned in future, the following should be ensured

T4xS desktop phone series

• Update to the new firmware 66.85.133.13: The firmware will be communicated via the Swyx Firmware Information Service in the next few days and will then be available for distribution to all Swyx users in the SCC. With the new firmware, the phones recognise the new RPS and can query their provisioning URL for SwyxON as usual. 
  Telephones that are initially connected to SwyxON after January 1st and are still running old firmware must be updated manually via the web front end of the respective telephone (see below).
• When connecting to the new RPS for the first time, older models of the T4 series (2020 and older) have another special feature. For secure authentication, a new PIN prompt appears. The user is asked to enter the last digits of the phone's serial number. The serial number (not to be confused with the MAC) can be found on a white sticker on the back of the device. This PIN must be entered once during the initial login. 

CP920 and CP960 conference phones

• There is currently no firmware that supports the new Yealink RPS. The phones must therefore be provisioned manually for initial setup on SwyxON. 
  • Create the phone as usual with the MAC address in Swyx Control Centre.
  • Then copy the provisioning URL (General Settings/System/Provisioning) from your SwyxON tenant into the web front end of the phone.
  • Restart the phone (no factory reset!).