This Sangoma Netborder SBC comes with 500 call path license and software upgradeable to 2000 call paths. Comes in a 1U form factor with a Dual AC power supply. The most cost effective, easiest to provision, and easiest to manage line of Session Border Controllers on the market. Sangoma?s NetBorder Carrier SBC provides full featured, carrier class security and interconnection at the edge of carrier networks.