I have a small size business where we have around 22 PCs.
At present, I have the internet connected directly to a switch1 (We use dedicated leased line and I have been provided with 5 static IPs by my ISP).
From the switch I have connected a line directly to my asterisk server with a static IP provided by my ISP.
Then, from switch1 another line is connected to a router (Netgear WNDR3700v2).
In the router, I have configured one live IP and enabled DHCP with IP range between 192.168.0.20 to 192.168.0.80.
From the router, I have connected a line to another 24 port switch which distributes internet to all the PCs. We use Windows 7 Pro for all the PCs.
Now, I have taken another office in the opposite building where I will be running around 20 PCs. From Swtich1, I am connecting a line to a router (Netgear WNDR3700v2) in the new office.
In the new office router, I am configuring another live IP provided by my ISP and enabled DHCP with IP range between 192.168.0.100 to 192.168.0.150.
From the router, I am connecting a line to a switch and distributing internet in the new office.
I do not have any Microsoft server at moment.
How do I connect this 2 network together, so that we can share files, printers and NAS. I do not want to connect via wireless.