Both really. SBO can be installed on some existing routing hardware (Netgear, Mikrotik, TPLink Routers) however there may be some limits to functionality when loading SBO onto OEM equipment (check with us if you have queries). At the head-end or data center then the appropriate device should be selected to run the SBO provisioning and management software.
All SBO hardware supports:
Full router functions such as policy routing, BGP, stateful firewall, etc
Hardware failover using VRRP
Link bonding and failover, call access control, statistics generation, etc