- Max CO Lines: 128
- Max Analog CO's: 52
- Max VoIP (H.323) trunks: 32
- Max VoIP (SIP) trunks: 64
- Max Total Extensions: 172
- Max Analog Proprietary Extensions: 4
- Max Single Line Telephones : 36
- Max Digital Proprietary extensions: 40 (DT300, T7600 series)
- Max IP Proprietary Phone extensions: 128 (64 for KX-NT400)
- Max SIP extensions: 128
- Multi-Cell Wireless Compatible: Yes
- Maximum Cell Stations (Antennas): 8
- Maximum Portable Handsets: 64
- Direct Station Select (DSS) Consoles: 8
- Dimensions (H x W x D): 5.1" x 17" x 13.4"
- Weight: under 18 lbs