Network Functions Virtualization (NFV) decouples network functions from proprietry hardware and systems so that network services like firewalls, routers, load balancers etc can be virtualised using COTS x86 or ARM commodity hardware.
This results in CAPEX savings in that proprietry hardware is not needed and your dependency on hardware and software release cycles is removed bringing increased agility and flexibility. OPEX is also reduced because the data centre footprint is reduced- multiple VMs can run on one server, and services can scale to meet peak demand rather than needing built-in overcapacity (often required by proprietry systems).
Get in touch if you have a bespoke requirement like this.