Yealink T48G-SKYPE FOR BUSINESS EDITION User Manual page 156

User Guide for the T48G Skype for Business phone
Add the contacts in the Team-Call Group. All members in the group will ring
simultaneously when you receive an incoming call. The phone of the members in the
group will ring after the time specified by you.
When simultaneously ring feature is enabled, the touch screen is shown as below:
If one member answers the call, other phones will stop ringing.
142