Radio over IP Cross Network VoIP Gateway Radio repeater can link up the civilian radio network, internet, and cellular phone.

Talkback/Radio Repeater/Cross-Network Gateway RoIP302M (Radio over IP)

RoIP 102  ATA Cross-Network Radio VoIP Gateway/Talkback

The fundamental of RoIP(Radio over IP)technology is to convert the audio and PTT signals in a radio terminal into IP packets and then transmit the data via the IP networks. The challenge in this technology is to insure that the audio is transmitted in real time and the PPT control signal is transmitted immediately and reliably. The radio range is general limited by the restricted transmitting power, the antenna sensitivity, and other environmental factors.

Key FeaturesOpen Standard VoIP Protocols (IETF SIP V2)Two 10/100 Ethernet for WAN / LAN connectionsSupply dynamic DNS serviceSpeech quality ensured by QoS at the Ethernet and IP layers and comprehensive jitter bufferLine Echo CancellationVLAN and QoS supportNAT Transversal and Router functionsSupport IP voice stream to via a recording serverHighly stable embedded Linux operating system in high performance ARM 9 Processor

Basic Features Two RJ-11 FXS port for traditional phone set or PBX's trunk lineSupport three PTT portLEDs for Power, Ready, Status, WAN, PC, FXSCall Forward, Call Hold, Call TransferDial PlanCaller ID

Enhanced Features

Dynamic selection of codecAdvanced jitter bufferAutomatic traversal of NAT and firewallVLAN / QosRouterEcho cancellation for SpeakerphoneComfort noise generation (CNG)Voice activity detection (VAD)Auto provisioning (requires auto provisioning server)On line firmware upgradeMulti-language support: English and Chinese

Supported Standards

ITU: H.323 V4, H.225, H.235, H.245, H.450RFC 1889 - RTP/RTCPRFC 2327 – SDPRFC 2833 – RTP Payload for DTMF Digits, Telephony Tones and Telephony SignalsRFC 2976 – SIP INFO MethodRFC 3261 – SIPRFC 3264 – Offer/Answer model with SDPRFC 3515 – SIP REFER MethodRFC 3842 – A Message Summary and Message Waiting IndicatorRFC 3489 – Simple Traversal of User Datagram Protocol (UDP) Through Network Address Translators (NATs)RFC 3891 – SIP “Replaces” HeaderRFC 3892 – SIP Referred-By Mechanismdraft-ietf-sipping-cc-transfer-04 –  Session Initiation Protocol Call Control - TransferCodec: G.711 (A/µ law), G.729A/B, G.723.1DTMF: RFC 2833, In-band DTMF, SIP INFO 

Talkback/Radio Repeater/Cross-Network Gateway RoIP302M (Radio over IP)