Mediant 1000B (M1KB) VoIP SIP gateway chassis, 6 x Gigabit Ethernet, dual AC power supplies and fans, 2 x T1 / E1 spans, OSN3B. Supports SBA for Microsoft Lync and VoIP gateway functionality. SBC capabilities can be enabled using orderable software options. Support up to 1000 Lync users. Preloaded with AudioCodes� Communications-Enabled Business Processes (CEBP) applications. license for CEBP applications can be ordered separately.