Configure 802.1Q VLAN on D-LINK switches

I am looking for some help on configuring 2 D-LINK switches (DGS 1510-52X on one side and DGS 1210-52 on the other) for my network needs.

WAN LINKS on router are actually 2:

• First is WAN with NAT translation to company LAN network, having VLAN ID 1, Un-Tagged on port LAN1 on router going to Port 1 on SWITCH A
• Second is IPSec VPN link with NAT translation, which should not interfere with LAN and is used on some trusted devices and equipment. This one has VLAN ID 2 on router port 2, Un-Tagged and goes to Port 48 of SWITCH A

Both switches should be configured pretty much the same, using only Level 2 configuration and VLAN 802.1Q, having:

• Ports 1 to 39 for LAN computers
• Ports 40 to 48 for VPN devices

Only SWITCH A is connected to router, while SWITCH B is connected to SWITCH A using SPF connected Fiber optics cable from SW A port 52 to SW B port 52.

Here's the simple scheme: 2 Switchec with router

Now, the goal is to have Un-Tagged devices on both switches, using LAN on ports 1-39 and VPN on ports 40-48.

Could somebody help me configure those ports, as I have no idea how to properly Tag/Untag/Group ports on both switches. Thank you!

• ROUTER Port 1 -- LAN, VID 1, Untagged.
• ROUTER Port 2 -- VPN, VID 2, Tagged? Untagged? SW A Port 1 connected to Router Port 1
• SW A Ports 1-39 for LAN -- connected to ROUTER Port 1, Untagged
• SW A Ports 40-48 for VPN -- connected to ROUTER Port 2, Tagged?
• SW A Port 52 SPF fibre -- Accept any VID, Untagged? SW B is not directly connected to router, only Fiber optics cable
• SW B Ports 1-39 for LAN -- connected to ROUTER Port 1, Untagged
• SW B Ports 40-48 for VPN -- connected to ROUTER Port 2, Tagged?
• SW B Port 52 SPF fibre -- Accept any VID, Untagged?