How can I use this cable?
Is this usable?
It sure is. But I have not found a really good use for it yet
i found this.
Connect the RJ45F to RJ45M rolled serial adapter to the console port if you are connecting the system to a serial console server with a standard CAT5 cable, and then connect the CAT5 cable to the adapter. The adapter provides the appropriate pinout connection to your equipment.
Manual Chapter: Platform Installation
You need to use this cable if the console connection to F5 appliance is via Console server.
So the connectivity looks like this.
Console Server (Cat 5 cable) --- RJ45F to RJ45M converter --- F5 Console Port.