looks like switch-option works at least I can type it and no sytax error, but now:
set interfaces ge-2/0/15 unit 0 family ethernet-switching
set interfaces ge-2/0/15 unit 0 family ethernet-switching vlan members "v20-2nd-floor"
set switching-options voip interface ge-2/0/15.0 vlan 80 <= should be vlan 80 or "v80-voide" ???????
edit ethernet-switching-options
set voip interface ge-2/0/15.0 forwarding-class ezqos-voice-fc