How to click one button to call several persons by phone

[jmwinternationa]

Dear Team,
I would like to build an App that has two two tables, Table 1 is for the Callers, and Table 2 is for that persons to be called. When a Caller from Table 1 is pushing button, this action will call several persons in the same group in Table 2. Could anyone show me how to do this?
Thanks for your help and advices!
John W