Hello and thanks you for Reply. Yes i have to connect two promises places 300 m far from each other. I have devices to be connected to different network s:
surveillance camera s to a simple web internet
Monitoring system, plant plc to company software vpn. This have firewall safeguard.
These two Lan must not conflict, overlap or interfere each other.
Transferred data are different
The question that needs to be asked is, do these two networks need to be isolated from each other?
If the answer is yes, then the typical implementation would be a managed switch at each end of the fiber with VLANs. Cameras are in VLAN10 and other traffic is in VLAN20 (for example). The switch remote switch has a trunk port (the fiber port) that allows both VLAN10 and 20. The core switch gets VLAN10 and 20 in on fiber and sends them to unique output ports to keep them separated.
The cost of fiber is not significantly different between single mode and multimode fiber. The optics for single mode may be slightly more expensive, but if you use single mode fiber, you can increase you bandwidth without worrying if the fiber can handle it. 300M is at the extreme end for 10GE on multimode (OM3) fiber.