Configuration Port vlan S3148P

Dears,

Good Morning. At present i'm whit a problem trying solve aboute voice vlan on switch Dell S3148P. I've got configurate on device two kynd of VLAN. Production VLAN e VOICE Vlan, but, i'm not geeting tag the voice vlan on the interfaces.The behavior now are my ip phone and the work  station whith the same adrress range (production vlan). And in a soon future i'll run a Fortnac on network. Acoording the document, i need the ip phone on voice vlan and the work station on production VLAN.

Anybody can help me?