Description: 3-PPT Port with GSM Module Cross-Network Gateway RoIP302M is developed based on the RoIP technology to bridge voice communications across multiple networks. It can connect up to 3 radio stations operated at different frequency bands simultaneously. These 3 radio stations can be configured in a single or multiple groups to communicate with another group which is defined in another RoIP device. This enables a very flexible configuration among various radio stations in order to form a single or multiple RoIP networks. With the built-in GSM and VoIP interfaces, RoIP-302 can also bridge voice communications among these networks. Key Features: Open Standard VoIP Protocols (IETF SIP V2) Two 10/100 Ethernet for WAN / LAN connections Supply dynamic DNS service Speech quality ensured by QoS at the Ethernet and IP layers and comprehensive jitter buffer Line Echo Cancellation VLAN and QoS support NAT Transversal and Router functions Support IP voice stream to via a recording server Highly stable embedded Linux operating system in high performance ARM 9 Processor Enhanced Features: Dynamic selection of codec Advanced jitter buffer Automatic traversal of NAT and firewall VLAN / Qos Router Echo cancellation for Speakerphone Comfort noise generation (CNG) Voice activity detection (VAD) Competitive Advantage: Support standard SIP protocol,DDNS Support ulaw alaw g.729 g723 etc code Built in Linux OS Peer to Peer provided 3 PPT Ports Send SMS Manage 12 units RoIP
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