Includes two modules with 4 BRI Ports each (16 calls). Upgradeable to 20 BRI spans (40 calls). Dual 10/100BaseT Ethernet and single AC power supply. Supports mixed configurations of Analog and Digital voice modules. Control protocol: SIP, including G.711/723.1/726/727/729AB Vocoders. This product is end-of-life and limited quantities are available. Existing installed base will be supported by AudioCodes up to software Version 6.6 (SIP protocol based). This product has been replaced by the Mediant 1000B.