cisco terminal console connection

You can find the relevant pinout information on the RJ45 port on the 4000 series here: https://support.f5.com/kb/en-us/products/big-ip_ltm/manuals/product/b4000-platform/1.html (over half way down).

These seem to match the Cisco cable specification I found here (granted for DB25 connectors but I'm sure nothing has changed but that): http://www.cisco.com/c/en/us/support/docs/dial-access/asynchronous-connections/14958-24.html and as the cables are 'rolled' I think you should be just fine without any adapters.