MTG200 PRI VoIP gateway provides the ability to terminate (or originate) T1/E1 circuits directly into IP telephony system or call center, Asterisk-based distributions such as Elastix, FreePBX, etc., or Freeswitch. It provides the ability to handle 120 concurrent calls maximum with G711 codec and 64 concurrent calls with G729. It supports ISDN PRI, SS7, and R2 signaling so that provides good connectivity to different PBX system.