Create simple Port base VLAN in Powerconnect 2848 Switch

Hi,

Just bought Powerconnect 2848 Switch.

I  wish to create 2 diferent VLANs that share 1 port for the internet router.

first vlan is for the department A, second vlan is for department B

computer on vlan1 will not have access to computers on vlan2 and oposite, but both virtual networks will have access to port 1 that is connected to the internet router

VLAN1: 1, 2-24

VLAN2: 1, 25-48

I had before Netgear switch and it was very simple to implement, but did't manage to create it in this switch.

Please help

-Roei