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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.
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 ChineseSupported 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