Set up a Remote SIP Phone via Yeastar FQDN

A Yeastar-supplied Fully Qualified Domain Name (FQDN) frees you from complicated network settings and helps you quickly establish a secure tunnel for remote SIP access, therefore it is more secure and convenient to set up a remote SIP phone using Yeastar FQDN. This topic takes Yealink T53W IP phone as an example to describe how to register a remote SIP phone via Yeastar FQDN.


  • You have subscribed Enterprise Plan or Ultimate Plan.

  • Make sure the following required FQDN settings are ready.
    • The Yeastar FQDN domain name is available.
    • The extension account to be registered can perform remote SIP registration via FQDN.
    For detailed configurations, see Configure Network for Remote SIP Access by a Yeastar FQDN.


Step1. Gather information for extension registration

Step2. Register the extension on an IP phone

Step3. Confirm the extension's registration status

Step1. Gather information for extension registration

Log in to PBX web portal, and gather the required credentials.

  • The FQDN of PBX (Path: System > Network > Yeastar FQDN)

    In this example, the PBX FQDN is

  • Remote SIP registration port (Path: System > Network > Yeastar FQDN > Features > SIP Access)

  • Transport protocol (Path: Extension and Trunk > Extension > Advanced > Transport)

  • Extension information (Path: Extension and Trunk > Extension > User)
    • Extension number
    • Registration name
    • Registration password

Step2. Register the extension on an IP phone

  1. Log in to phone web interface, go to Account > Register.
  2. From the Account drop-down list, select an available account.
  3. Set Line Active to ON.
  4. Fill in the required information to register the SIP extension.

    • Label: Specify the name to be displayed on the LCD screen of IP phone.
    • Display Name: Specify the display name of the account when sending a call.
    • Register Name: Enter the registration name of the extension.
    • Username: Enter the extension number of the extension.
    • Password: Enter the registration password of the extension.
    • Server Host: Enter the FQDN of the PBX.
    • Port: Enter the remote SIP registration port.
    • Transport: Select the same transport as that of the extension.
  5. Click Confirm.

Step3. Confirm the extension's registration status

You can confirm the extension's registration status in one of the following ways:
  • On the phone's web interface, check if the extension is registered.
  • Log in to PBX web portal, go to Extension and Trunk > > Extension, check if the endpoint icon displays in the Online Status column.


The SIP phone is ready for use. Users can use the SIP phone to make and receive calls.