The 1-port GSM Gateway (VoIP) bridges the GSM services and the IP networks. key featuresProvide one cellular channels for IP-PBXSupport open standard ... ports for the LAN and an additional deviceGuad band GSM module: support GSM 850MHz, 900 MHz, 1800 MHz, 1900MHzSpeech quality ensured by ... for Power, Ready, Status, WAN, PC, GSM Call forward from GSM to VoIP and VoIP to GSM Dial in mode or dial out ...