Problems with HTTPS for Yealink T4x series: With firmware version x.73.x.x or higher, the Login for Yealink T4x phones is based on an Internet Explorer component. Therefore, make sure first that you can log on to the Yealink phone via Internet Explorer.
If the login with Internet Explorer fails due to HTTPS certificate problems, the following restrictions apply:
- The Action URLs cannot be set automatically.
(The Action URLs are required for the call display.)- The Action-URI-Allow-IP-List (CTI Remote Control) cannot be set automatically.
- The initial status of call forward / DND cannot be determined.
- Call forwarding cannot be set.
Solution 1: Turn off HTTPS in Yealink
- The setting for HTTP / HTTPS can be found in the Yealink web configuration under [Network > Advanced > Web server type].
- Here you may need to deactivate HTTPS.
- If the Yealink is configured automatically by your telephone provider (auto-provisioning):
- HTTPS would have to be switched off in the web portal by your telephone provider and then the Yealink would have to be restarted.
- Placetel: Under [Telephone system > Telephone security] you should switch from "http_https" to "http".
- Peoplefone: Under [Autoconfiguration - Additional options > Network], "HTTPS WUI" must be set to "disable".
- nfon: Unfortunately, there is no option to switch off HTTPS.
- 3CX: Unfortunately, there is no option to switch off HTTPS.
- You can also switch off auto-provisioning in the Yealink under: [Settings > Autoprovisioning > PNP = Off].
Solution 2: Manually configure Action URLs in the phone
- The prerequisite is that the computer has a static IP address. If the computer receives changing IP addresses via DHCP, the Action URL configuration would have to be carried out anew each time.
- In the CTI Client, under [Options > PhoneDialog (TAPI device) > Driver configuration > Action URLs], the mode must be set to "Action URLs are already configured in the phone".
- Click on "Create configuration file ..."
Open the Yealink web configuration in your web browser and go to [Settings > Configuration > CFG Configuration].
- Click here on "Import..." and select the previously created configuration file.
- Scroll to the bottom of the website and click "Confirm".
- Auf dem Tab "Verbindung" können Sie nun HTTP oder HTTPS auswählen.
- Bei Verwendung von HTTPS reagiert das Telefon leicht verzögert auf CTI-Kommandos.
- Die Verwendung von HTTP ist nur möglich, wenn in der Yealink Web-Konfiguration unter [Netzwerk > Erweitert > Webserver] HTTP mit freigeschaltet ist.
- Hint: Wenn im Yealink HTTP und HTTPS freigeschaltet sind, dann können CTI-Kommandos auch per HTTP ausgeführt werden. Der Zugriff auf die Web-Konfiguration ist aber nur per HTTPS möglich.
- In the mode "Action URLs are already configured in the phone", a click on the test button on the "Connection" tab should now produce an "OK". Der Test erfolgt hier per HTTP/HTTPS-CTI-Kommando.