The IPR Remote family can be used under three general scenarios:
- Remote radio access
- Leased Line Replacement
- Radio bridging via IP
Remote Radio Access
An operator can control and monitor a remote transceiver across a LAN or a 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.
Multiple Omnitronics handsets and consoles can be multi-dropped to provide shared access to the transceiver by a number of operators from remote locations. The IPR range can also be used in conjunction with legacy, 3rd party consoles.
More sophisticated applications can be supported using Omnitronics SIP compatible consoles. These consoles enable operators to select multiple remote channels for communications.
The IPR110Plus provides connection to a private SIP PBX or to a public VoIP service provider. In the example below, the radio connected to the IPR110Plus 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. Operators using the radio network are able to make PSTN calls by keying pre-defined DTMF or SELCALL strings.
The above example demonstrates how organizations can extend radio network access to an office environment through a SIP PBX or even to users at home using third-party VoIP providers. Compliance with the industry standard protocol of SIP is what makes this radio-telephony application possible.
Replace Leased Lines or a UHF/VHF Link
Two radios can be connected back-to-back over an IP link. This can typically be used to interconnect two repeater sites over a Wide Area Network. The PTT and COS signals are transported over the link as data messages. The IPR100 will provide a configurable PTT output to the radio. It will also accept a configurable COS input from the radio. An active COS signal from the radio will enable the transmission of voice packets over the IP network and generate a PTT output at the opposite end.
Where the communications equipment is not able to provide a COS output, the VOX function of the IPR100 can be used. When a voice signal is detected at the radio port of the IPR100, an internal COS signal is generated and transmitted to the destination IPR100. This will also enable the transmission of voice packets over the IP network. A configurable hang period is automatically applied to the VOX function.
This application in this example could also be achieved using other devices in the IP Remote family.
Radio bridging across IP
The third application scenario makes best use of the multicasting technique. The IPR100 allows a number of transceivers to be interconnected over a LAN or WAN. Each IPR100 unit is linked to a common multicast group address. When one transceiver receives audio, voice packets are transmitted to the multicast address. Any other IPR100 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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