Are you trying to connect this hub to a or just between two older computers? EtherFast® 10/100 Workgroup Hubs - Linksys
While a standalone PDF for the NH1005 specifically can be hard to find due to its age, it belongs to the EtherFast® 10/100 Workgroup Hubs series, which shares identical setup and operation. Linksys Network Hub Nh1005 Manual Pdf txt
To connect this hub to another hub or a router, use the dedicated Uplink port (usually shared with Port 5 or labeled separately). Are you trying to connect this hub to
Use standard Cat5e or better Ethernet cables to connect your computers, printers, or other network devices to any of the 5 ports. Use standard Cat5e or better Ethernet cables to
Ensure the adapter matches the required voltage (check the bottom of the hub).
Plug the external AC power adapter (typically 9V or 12V) into the hub's power jack, then into a wall outlet.