Panasonic KX-NCP500 Hybrid IP PBX Control Unit with 5 Free Slots.

• Network Communication Platform with up to 172 extensions and 128 COs
• Choose between fixed, mobile, and touch screen IP proprietary phones
• Integrated support for Communication Assistant application suite
• Empower remote workers with IP phones and softphones
• Built-in 2 channel voice messaging and DISA
• For unified messaging, add TVM50 or TVM200 voice processing systems
• Built-in SIP trunking
• Leverage existing investments with digital extensions and ISDN trunks
• Maximum CO Lines: 128
• Maximum Analog COs: 64
• Maximum VoIP H.323 Trunks: 32
• Maximum VoIP SIP Trunks: 64
• Maximum Total Extensions: 172
• Maximum Single Line Telephones: 36
• Maximum Digital Proprietary Extensions: 40
• Maximum IP Proprietary Phone Extensions: 128
• Maximum SIP Extensions: 128
• 2 Regular free slots, 3 small free slots