... all the features. . Features:1,Support the access of wireless (GSM ), PSTN, Phone. 2,Supports GSM, ... host processor intervention. 8, It supports all the functions of Asterisk PBX systems needed. Special Features:1, ... be used on GSM800, it reduce users' difficulty of development. 2, GSM800 support 8 channels, user ... artificial factors please inform us within 15 days of receipt. We offer a 100% money back ...