... with 16 or 32 sim cards 2.GSM,CDMA,WCDMA VoIP gatewaty voip gateway Key features:1.4 channels, 8 channels, 8 channels ... SMS batch receiving/sending, AT command compatible 7. Compatible with Asterisk, Elastix etc. 8. 1 WAN 10/100Base-T ethernet(RJ ... , G729, G711 voice compression etc.), fully compatible with Asterisk and wellknown VoIP device providers(Cisco, Huawei etc.), for deploying flexibly many ...