USED IP PBX Asteristk VoIP System.

Built-in configurable Asterisk IP PBX
Astfin GUI
High performance OSLEC (Open Source Line Echo Canceller)
Voice mail
Call forward, call waiting, call transfer
Call conference
Call queues
SIP trunking, IAX trunking
PSTN analog trunk (up to four PSTN trunks)
Flexible dial plan
Configurable IVR menu.

System: uClinux/Astfin

Interfaces

2 X RJ45 port (1WAN + 1LAN with router)
1 X power port.
8 X RJ11 ports(8 X FXO/FXS/LifeLine modules slots)

Hardware:

CPU: 400MHz Blackfin 532 Chip
Four analog (FXO/FXS) module interfaces.

The PL-600 IP-PBX is a complete Asterisk powered IP-PBX with 8 FXS/FXO/LifeLine modules, It is an embedded system with built-in SIP/IAX proxy server and NAT functions. It provide a solid, uniform platform for traditional PSTN communications as well as VoIP communications