highlights:

24 Ports
2 SFP Combo Ports
Power over Ethernet (PoE)
Supports 100 SIP Stations
Supports PBX and key system modes
SIP/PSTN Gateway and DHCP Server
SIP Trunking and Networking
Voice mail and Auto attendant
Dial by name directory
Graphical User Interface (GUI)

Features and Benefits

Voice mail
DHCP Server
Auto attendant
Dial by name directory
Graphical User Interface (GUI)
Shared Line Appearance (SLA)
Supports PBX and key system modes
SIP/PSTN Gateway
Supports SIP Trunking and Networking
Busy Lamp Field/Direct Station Select (BLF/DSS)
IP PBX supports up to 100 SIP stations
Music-on-hold input, paging output, door relay
Supports ADTRAN IP 706/712 and certified Polycom phones
Voice Quality Monitoring (VQM), Mean Opinion Score (MOS) reporting
Wi-Fi access controller for NetVanta wireless access points (eight)