Features (some features listed are optional):

• DECT Multi-Cell Wireless
• VoIP Gateway with QSIG(Enhanced System Networking)
• Caller ID (Name and Number)
• Support ISDN Primary Rate Interface(PRI) with QSIG, SIP and T1 Trunks
  
• Networking with Centralized Voice Mail
• Enhanced Voice Messaging(VMA)
  
• Uniform Call Distribution(UCD)
• Direct Inward System Access(DISA)
• Voice Mail integration
• Centralized voice mail support
• Supports Analog, Digital, IP Phone or SIP Phone Extensions
• CommunicationsAssistant Productivity Application Suite
• VM Assistant-Flexible, easy-to-use, Unified Messaging
• Built-in Call Center functions

Specifications:

• Max CO Lines: 128
• Max Analog CO's: 96
• Max VoIP (H.323) trunks: 32
• Max VoIP (SIP) trunks: 32
• Max Total Extensions: 128
• Max Analog Proprietary Extensions: 24
• Max Single Line Telephones: 96
• Max Digital Proprietary extensions: 128 (DT300, T7600 series)
• Max IP Proprietary Phone extensions: 192
• Max SIP extensions: 128
• Multi-Cell Wireless Compatible: Yes
• Maximum Cell Stations (Antennas): 32
• Maximum Portable Handsets: 128
• Direct Station Select (DSS) Consoles: 8

Optional Cards:

KX-TDA0108--S-Type Power Supply
KX-TDA0104--M-Type Power Supply
KX-TDE0110--16-Channel VoIP DSP Card
KX-TDE0111--64 Channel VoIP DSP Card
KX-TDA0143--4 Port Cell Station Interface Card
KX-TDA0144--8 Port Cell Station Interface Card
KX-TDA0170--8 Port Digital Hybrid Line Card
KX-TDA0172--16 Port Digital Line Card
KX-TDA0177--16 Port SLT w/CID Card
KX-TDA0470--16 Channel IP Extension Card
KX-TDA1080--8 Port Loop Start Co Trunk Card
KX-TDA0181--16 Port Loop Start Co Trunk Card
KX-TDA0187--T1 Trunk Card
KX-TDA0290--ISDN Primary Rate Interface
KX-TDA0484--4 Channel IP Gateway Card
KX-TDA0490--16 Channel IP Gateway Card
KX-TDA0161--4 Port Doorphone Card
KX-TDA0164--4 EIO Card
KX-TDA0168--Single Line Extension Caller ID Card
KX-TDA0190--Optional 3-slot Base Card
KX-TDA0191--4 Channel Message Card
KX-TDA0193--8 Port Caller ID Card
KX-TDA0194--4 Channel Enhanced Message Card