... 1.32 Port GSM/GPRS FWT,capable of 128 sim cards,4 sim card slots of every port.2.You can ... plus bulk SMS , two in one machine,built-in usb dongle key,plug-play,4.32 RJ11 interface,you can connect ... ports FXS interfaces;2) Each port has 4 sim cards, 4 sim cards can rotate by using time or call out ... adjust voice volume by setting up from telephone set;9) SIM card supported (1.8V, 3V);8) Caller ID display ...