Benefits and Features of RoIP
Replace Leased Lines
Connect Remote Radios
Understanding RoIP Networks
Radio over IP differs from Voice over IP technology in a variety of ways. This White Paper explains those differences and the various considerations the IT team and systems integrators need to understand in order to create effective RoIP networks that meet their needs.
Interconnect Multiple Digital and Analog Radio Types
By using a gateway infrastructure you can also connect operators on PC consoles to radios of multiple radio types: analog or digital; conventional or trunked; open-standard or proprietary. The DRG range digital radio gateway can be programmed with a wide variety of digital protocols whilst the IPR range can connect analog radios to the same network.
Operator Access to Remote Radios
By using IP gateways, operators on PC-based or hardware dispatch consoles can connect to Analog Radios across a LAN or WAN without the need for backroom equipment. The transmit and receive audio, along with the PTT and Busy/COS signals, are transported over the link transparently. SELCAL, ANI and DTMF are also transported reliably, regardless of the level of compression that is employed.
Radio to Phone Connectivity
The IPR110+ SIP compatible gateway provides a connection to a private SIP PBX or to a public VoIP service provider. This diagram shows how the radio connected to the IPR110+ becomes an extension on the SIP server’s database. It is given a phone number that enables calls to be routed between it and the PBX or the PSTN. Phone users accessing the radio network are able to make PSTN calls by keying pre-defined DTMF or SELCALL strings.
Replace Leased Lines or a UHF/VHF Link
Two or more radios can be connected back-to-back over an IP link. This can typically be used to interconnect repeater sites over a Wide Area Network. The PTT and COS signals are transported over IP as data messages. The IP gateway will then provide a configurable output to the radio.
Radio Bridging across IP
The IPR range of gateways can support radios on multiple frequency bands. Each IPR unit is linked to a common multicast group address. When one transceiver receives audio, voice packets are transmitted to this multicast address. Any other IPR unit that is linked to that address will accept those VoIP packets and re-transmit the audio to its respective radio.
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