Tonmind IP Speaker can support IP direct call from IP Phone. The stepls are as below setting Yealink IP Phone as example.

1. Add contact info in IP Phone, set name and IP Address, the IP Address format is like 123@ Tonmind SIP Speaker IP Address, for example, 123@192.168.5.200

2. Find Contact Menu in IP Phone, find the name you just set, press and it will dial to Tonmind Network Speaker.