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NXU-2B – Radio over IP (RoIP) Gateway

The NXU-2B Network Extension Unit uses JPS’ proprietary Radio over Internet Protocol (RoIP) technology to transfer voice communications and serial data. It is a drop-in replacement for the NXU-2A, with additional features.

 

NXU-2B Radio over IP

Additional Information:

Application Notes:

The NXU-2B is a general purpose stand-alone device that interfaces full duplex audio, one RS-232 port and four status bits onto an Ethernet network. It is optimized for use with radios, radio communication consoles, and other JPS products such as the ACU product line The NXU-2B features a variety of codecs, allowing audio links to be configured for the optimal combination of bandwidth and signal quality.  It provides a low cost, flexible method for extending radio communications over existing network infrastructure; eliminating the need for leased lines and microwave sites.

JPS NXU-2B Simple Diagram

A pair of NXU-2Bs can form a simple system that creates a transparent communications link between the two. One of a pair of units is set up as the server, the other as the client. The audio, RS-232, and status bits appear to be simply extended between the two devices.

Benefits:

  • Offers superior audio quality with a minimal use of network bandwidth.
  • Enables the formulation of low cost, extremely flexible radio communications networks.
  • Multiplexes voice audio and data over a standard Ethernet network.
  • Eliminates need for in-band signaling to indicate active PTT condition.
  • Fully compatible with JPS’ WAISACU and PCNXU RoIP interfaces.

The NXU-2B may be used to bring individual talkgroups into a JPS wide-area system:

NXU-2B Block Diagram

The NXU-2B features remotely adjustable advanced optimization settings, including audio level, audio delay, and voice recognition. The NXU-2B’s ability to delay TX and RX audio is ideal for trunking applications where extra delay may be required. Voice recognition (VMR), as with voice operated transmit (VOX), allows the NXU-2B to determine when a radio or other device is receiving with no squelch condition.

The NXU-2B’s ability to support multicast IP is optimal for customers who use multiple NXUs.  Multicast IP reduces the amount of network traffic, which ensures that each unit in the multicast group will receive communication.

Advantages over the NXU-2A:

  • Designed and built with modern components and a smaller footprint
  • Set transmit and receive audio levels remotely (no more manual pots)
  • 600 Ω balanced input and output
  • PTT relay (in addition to solid state keying)
  • Does not require the audio crossover adapter (connects directly to standard JPS cables)
  • Remote reboot and other administrative functions

With seamless audio translation, the NXU-2B is the ideal interface for any push-to-talk over cellular system, such as JPS VIA:

NXU-2B Block Diagram

 

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5800 Departure Drive | Raleigh, NC 27616 | 919.790.1011 | sales@jpsinterop.com

Radio Interoperability

Radio Interoperability Gateway

Radio over IP

RoIP

Voter Comparator

Receiver

Voting

Push To Talk Over Cellular