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How to configure T3 Series for 3CX

This guide applies to v15.5 only.

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How to configure T3 Series for 3CX

Supported Models Yealink T3 series (End Of Life)

Step 1: Upgrade to the Required firmware

Step 2: Factory Reset the IP Phone

Step 3: Provision the phone

Local LAN or SBC: Provision via Plug’n’Play

Remote phones: Provision with the Manual Provisioning Link

Step 4: Extended Phone Configuration

Important note about BLF Layout

Known Limitations

Supported Models Yealink T3 series (End Of Life)

  • Yealink T32G **See Limitations
  • Yealink T38G **See Limitations

Step 1: Upgrade to the Required firmware

Ensure that the phone is running on the required firmware by 3CX. In case the device needs manual updating download the latest distributed required firmware by 3CX here. Read how to check what firmware the phones are running on and how to upgrade them in this guide: How to manual upgrade Yealink IP phones.

Step 2: Factory Reset the IP Phone

Before provisioning the IP phone, the phone must be brought back to factory defaults in case the device has residual settings of a previous configuration. To reset the device read our how to factory Reset Yealink Phones document.

Step 3: Provision the phone

There are several methods to provision a phone:

  • Plug & Play -  For phones on the local LAN or behind the 3CX SBC.
  • Manual Provisioning - For phones on remote networks that will connect directly to 3CX and use STUN.

For more information, see When can I use which provisioning method?

Local LAN or SBC: Provision via Plug’n’Play

  1. Connect the phone to the network. A PnP request will be sent automatically to 3CX.
  2. Go to the 3CX Management Console ⇒ “Phones” page. The new phone will be marked in Bold.

  1. Click on the BOLD entry and choose between “Assign Ext” or “Add Ext”, depending on whether you want to assign the phone to an existing extension or create a new one.

  1. All major provisioning settings are pre-populated. If your PBX has multiple network cards, select to which network this IP phone is connected.
  2. Click “OK”. The phone will configure automatically and will reboot to finalize the setup.

Remote phones: Provision with the Manual Provisioning Link

In order to provision the device for STUN (Teleworker) usage, the device must be provisioned using the Manual Link Provisioning method outlined here.

Step 4: Extended Phone Configuration

IP phones can be tweaked to match the user’s needs. Those might be skipped if they are not desired and the phone will be rolled out in a default configuration.

Important note about BLF Layout

  • Yealink T32 has the first 3 BLFs locked to Line keys
  • Yealink T38 has the first 6 BLFs locked to Line keys

Known Limitations

  1. End Of Life models:
  • No support for CTI via uaCSTA
  • No direct UI login
  • No support for “Let’s encrypt”
    (certificate check needs to be disabled manually if used as remote extension)
  • No RPS Support
  • In STUN provisioning assign a minimum of 12 RTP ports
  • Incompatible with secure "SSL Transport and Ciphers" setting

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