La description

Features
     â— Spans a range of *2 FXS ports
     â— Flexible hardware configuration, easy to expansion
     â— Support T.*8 & Pass-through real-time fax, which can continually fax multiple pages
     â— VAD, CNG, PLC, Dynamic Jitter Buffer L2/L3
     â— Call hold, Call waiting, Call forward, Do not disturb, Blind transfer, Attended transfer, *-way conference
     â— Perfect interoperable with leading Softswitch and IPPBX suppliers worldwide
 
Specification
Interfaces
     â— Telephony Interfaces: *2 FXS lines
     â— Network Interfaces: 4**0/**0M Base-TX RJ**5
     â— LED Indicators: Power, Run and Line LEDs
 
Voice Processing
     â— Voice Packet Capabilities: G.**8 with *2, *4, or **8 ms tail length; CNG, VAD, PLC, AJB
     â— Voice Codec: G.**1A/U low, G.**3.1, G.**9AB
     â— QoS: Diff Serve, Tos, **2.1P/Q VLAN Tagging
 
Call Features
     â— Calling Type: Voice/FAX
     â— IVR Voice Prompt: FXO second stage dialing, Private service IVR
     â— Call Handling: One stage dialing, Configurable dial plan, up to **0 dial rules
     â— FAX over IP: T.*8/Pass-through/Modem FAX mode, Up to *4.4kbps
     â— DTMF: RFC***3, SIP INFO, INBAND
     â— Call Features: Caller ID of block, Call waiting, Blind or attended call transfer, Call forward, Do not disturb, *-way conference