One server?(EPS-104) is placed in Peking(or HK), four ATAs(EPT-101) placed at other offices. Using DDNS, you can connect these 5 offices and use the PSTN@Peking(HK). No VPN required! http://item.taobao.com/item.htm? ... x&id=3360689625
Wondering if the PSTN call forwarding feature is included.