http://www.alibaba.com/rss/tradelead_cat/50901.rss Marketplace of export & import, offers company directory, catalog, trade leads to importer, exporter, manufacturer, wholesaler. en-us alibaba http://www.alibaba.com/sellinglead-gs/209688868/SIP_IPPBX_with_32_FXS_4.html inside 32FXS+4FXO ports, Support 100 IP extensions by IP phone or FXS gateway, support IVR, SIP trunk, ACD, MOH,Transfer http://www.alibaba.com/sellinglead-gs/209688707/SIP_IP_PBX_with_16_FXS.html inside 16 FXS + 8FXO ports, you can add 20 IP extensions by IP phone or FXS gateway, support IVR, SIP trunk, ACD, MOH,transfer http://www.alibaba.com/sellinglead-gs/209688606/SIP_IP_PBX_with_4_FXS.html inside 4 FXS + 4 FXO ports, you can add 20 IP extensions by IP phone or FXS gateway, support IVR, SIP trunk, ACD, MOH,transfer