uaCSTA TAPI for Yealink phones

Yealink T2 series

  • Yealink T19-E2, Yealink T21-E2, Yealink T23, Yealink T27, Yealink T29
  • from firmware version x.81.0.15

Yealink T4 series

Yealink phones with firmware V81 or higher support uaCSTA, also:

Yealink VP59, Yealink SIP-T58V, Yealink SIP-T58A, Yealink SIP-T56A, Yealink T57W, Yealink T54W, Yealink T53W, Yealink T53, Yealink SIP-T54S, Yealink SIP-T52S, Yealink SIP VP-T49G, Yealink T4S, Yealink SIP-T48G, Yealink SIP-T46G, Yealink SIP-T42G, Yealink SIP-T41P, Yealink SIP-T40G, Yealink SIP-T40P, Yealink SIP-T29G, Yealink SIP-T27G, Yealink SIP-T23G, Yealink SIP-T23P, Yealink SIP-T21(P) E2, Yealink SIP1TP27TP2

Setup on the phone:

  • Open the browser interface of the phone by entering the IP- address with https: // (Example: https: //, log in and use an account that has not been used so far, in our example account 2
  • account
    • to register
    • Account2
      • Account active: Activated
      • Display name: uaCSTA
      • Registration name: MAC- Address of the phone Example : 805EC00746BF (ablesbar in the menu under Status)
      • Username: MAC- Address of the phone Example : 805EC00746BF (ablesbar in the menu under Status)
      • Password: The password ( stored in the uaCSTA ( under Windows) under "CTI-Settings for desk telephones" under "CTI-Interface password" is explained below. Simply assign a password and remember).
    • Under SIP-Server 1
      • Server Host: DNS-Name or IP- address of the PC and port Example : 55556
      • Transport: Protocol of the telephone interface in uaCSTA Server for SIP Phones. Example : TCP
      • Server is running from : 300
  • Leist. Charm.
    • Remote control :
    • CSTA-Control: Activated 

Settings on the PC:

Under Windows you click on the three dots : in the uaCSTA-Menu

CTI- settings for desk phones : Mac- address and IP- address of the phone can be found in the phone menu under Status

uaCSTA CTI- Settings for desk phones
Make sure to switch the top point from Cisco to Yealink, enter the IP- address of the phone, use port 55556 ( as also stored in the phone under Account), enter the MAC- address of the Yealink phone, set a password that you also use in the phone with uaCSTA- account. Then the account should register. If not, restart the PC and the phone and make sure that the telephony service is set to "automatic" on the PC. If it doesn't work, call us. Telephone number: See under Contact


For a first test click on :

Enter a phone number and click on the green handset . Your phone should now dial :

Test TAPI:

Start Phone.exe from Select under Device "Global IP Tel MultiLine 000" and then click on Start Session . Enter a phone number and click on "Make Call" .

If you can do that, you're done! Then you can z.B. install and enjoy CTI!