Mediant 800B with 6 Active/Standby pairs of FE/GE interfaces and 0 SBC sessions, upgradeable to 250.Includes Mediant 800B chassis, 2 pairs of GE ports and 4 pairs of FE ports, and single AC power supply. The maximum supported SBC sessions depends on hardware configuration and software version.One Year Manufacturer's Warranty - Support and Installation services are offered at an additional cost. See technical support options listed above.