Category Archives: Yealink

manually download phone firmware for 3cx phone system

You can download the latest supported phone or handset firmware for 3CX from here: https://www.3cx.com/support/phone-firmwares/

troubleshooting Yealink WF50 Wi-Fi USB dongle

The Yealink WF50 is only compatible with the following phones

  • Yealink SIP-T27G
  • Yealink SIP-T41S
  • Yealink SIP-T42S
  • Yealink SIP-T46S
  • Yealink SIP-T48S
  • Yealink SIP-T53

The Yealink phone must also be running version 84 firmware otherwise the WF50 USB Dongle will not be detected by the phone.

At time of writing the following firmware should be running on the phone

  • Yealink SIP-T27G requires firmware 69.84.0.10 or 69.84.0.15 or 69.84.0.35
  • Yealink SIP-T41S requires firmware 66.84.0.10 or 66.84.0.15 or 66.84.0.35
  • Yealink SIP-T42S requires firmware 66.84.0.10 or 66.84.0.15 or 66.84.0.35
  • Yealink SIP-T46S requires firmware 66.84.0.10 or 66.84.0.15 or 66.84.0.35
  • Yealink SIP-T48S requires firmware 66.84.0.10 or 66.84.0.15 or 66.84.0.35
  • Yealink SIP-T53 requires firmware 95.84.0.10 or 95.84.0.15 or 95.84.0.20 or 95.84.0.30 or 95.84.0.35

Firmware can be downloaded directly from Yealink here:

http://support.yealink.com/documentFront/forwardToDocumentFrontDisplayPage

If you are running 3CX then you can download the latest supported firmware from here:

https://www.3cx.com/support/phone-firmwares/

Change of behaviour with TRAN (Transfer) key after upgrading Yealink T3X and Yealink T2X Firmware to V70

I have noticed a change of behaviour with TRAN (Transfer) key after upgrading Yealink T3X and Yealink T2X to the new V70 firmware along with upgrading 3CX Version 11 to Service Pack 3.

It appears that the default DSS Key Transfer Mode is changed from Attended Transfer to Blind Transfer.  An Attended Transfer was always performed when you used the BLF/DSS Keys to perform the Transfer in previous Yealink firmware versions.  For example A calls B wanting to speak with C, B presses TRAN button and then presses the BLF/DSS Key for C.  In this instance B should be able to speak with C (Attended Transfer) to see if they want to take the call rather than A just being passed straight to C (Blind Transfer).

yealink blind transfer

 

You need to login to the Yealink HTTP Interface and then navigate to Phone->Features->Transfer Settings and Change “Transfer Mode via DSSKey” to “Attended Transfer” by using the drop down menu.

yealink attended transfer

So by changing this simple setting you can restore the Attended Transfer function whilst still taking advantage of the V70 Firmware for your Yealink Phone.