voip, ip pbx,voip pbx,china voip manufacturer Houyuan Techology (HK) Limited ( houyuanhk.com ) produce IP PBX,VOIP products,RFID and other elecronic products. The IP PBX is a complete Asterisk Appliance with one XO or FS module .Tt is an embedded open source Linux system with built-in SIP/IAX2 proxy server and NAT funtiongs. Tt provides a solid,uniform platform for traditional PSTN communications as well VoIP communications. Hardware .CPU: 400MHz Blackfin 522 Chip .Flash :256 MB .SDPAM:64MB .LED .Programmable[...]