... card for asterisk,elastix IPPBX the card can be GSM + FXO + FXS mixed ports easy to install ... Feathers:* Support the access of wireless(GSM and CDMA), PSTN, Phone.* Supports GSM, CDMA two kinds of wireless ... communication standard.* Support GSM: 850M/900M/1800M/1900M, CDMA: 800M.* ... . Model list:1 channel GSM+1 channel FXO+2 channels FXS2 channels GSM+1 channel FXO+1 channel ...