KX-NCP (Network Communication Platform) Hybrid IP PBX Control Unit with up to 108 Extensions and 84 COs. Hybrid IP PBX Control Unit Features: IP Phones for Local and Off-Premise Extensions Immediately Available Desktop Application Software Scalable Local, National, or Global NCP Clustering Remotely Upgradeable to Future Software Releases SIP and H.323 Compliant Complete Integration Pathway to Proprietary Cellular Phones Compatible with Panasonic Door Phones and other Add-on Devices Extensions Specifications: System Total: 108 IP Proprietary Telephones (IP-PT): 64 SIP Extensions: 64 Single Line (a/b) Telephones: 36 Digital Proprietary Telephones (DPT) - DXDP: 40 Analog Proprietary Telephones (APT): 4 Direct Station Select (DSS) Consoles: 8 Voice Processing Systems (VPS): 2 CO Line Specifications: Analog COs: 16 ISDN Trunk - PRI: 46 SIP Trunks: 32 Control Unit Contains: (1) Cabinet with 7 Free Slots (1) Main Processor Unit with 1 SD Card (4) Virtual Extension Slots (4) Virtual CO Slots Enhanced Simplified Voice Mail