NethCTI: Click2call not working on Yealink T33G with firmware 124.87.0.15

[viktec]

Steps to reproduce

1. Configure a Yealink T33G with firmware 124.87.0.15 as a desk phone for NethLink.

2. Attempt a Click2Call action from the NethLink desktop client.

3. Observe the system behavior and logs.

---

Expected behavior

The Click2Call request should successfully trigger an outbound call on the Yealink T33G.

---

Actual behavior

• The call is not triggered.

• Windows shows a notification badge.

• NethLink logs display an error such as:

  [backendpage*] ERROR {}
  

• Click2Call fails because firmware 124.87.0.15 disables HTTP access by default, allowing only HTTPS.

• The current phone URL configuration uses an HTTP endpoint, which the device no longer accepts.

• Example of the required working HTTPS URL format:

• Example

  curl -v -X GET https://$PHONE_USER:$PHONE_PASS@$PHONE_IP/servlet?key=number=$NUMBER&outgoing_uri=$ACCOUNT@$SERVER
  

[viktec]

I tested a Yealink T31G with firmware 124.86.0.5, and using HTTP links, the requests work correctly, including functions such as mute and pause.

Additionally, besides the T33G, this issue has also been reported on T31G and T42U with the following firmware versions:

Yealink T31G: 124.87.0.15 and 124.86.0.40

Yealink T42U: 108.86.0.70

[mgarra]

Also Yealink T43U: 108.87.0.15