The NXU-2 uses VoIP technology to send and receive digital voice audio. VoIP stands for Voice over Internet Protocol, which is a means of digitizing voice signals and sending them over a digital network. The digital network can be a LAN (Local Area Network), WAN (Wide Area Network), or the internet itself. The NXU-2 embodies this VoIP technology in a way that enables communications radios |
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to be interconnected across the room or around the world. NXU-2采用VoIP技术发送与接收数字话音信号。VoIP是指话音通过互联网协议传输,它是一种将话音信号数字化的方式,并将其通过数字网络加以传输。这一数字网络可以是LAN(局域网),WAN(广域网)或是互联网。 | |
ADVANTAGES (NUX-2的优点):
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One of the JPS family of products, the NXU-2 connects communications equipment to a digital network using VoIP technology. It is intended for use with radio communications consoles, communications radios, and JPS products such as the ACU-1000 Interconnect Unit and the SNV-12 Voter. The NXU-2 is a general-purpose stand-alone device that interfaces full duplex audio, one RS-232 port, and four status bits onto an Ethernet network.. A pair of NXU-2s can form a simple system that creates a transparent communications link between the two. The unit at the far end is the sever, the one at the near end is the client. The audio, RS-232, and status bits appear to be simply extended between the server and the client. |
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图1:基本的NXU-2结构图
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一、APPLICATIONS (应用): 1、SIMPLE NXU-2 RADIO YSTEM (单一NXU-2无线通信系统)
图2:举例说明单个通讯收发信机通过一个网络与远端话音控制台连接的一个基本的NXU-2的应用。发射/接收的话音和PTT/COR信号被数字化地通过网络传输,并且清晰地出现在另一端。在话音控制台的操作者使用远端的无线电台就好像电台就在身边一样。 |
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2、REMOTE ACU-1000 CONTROL (遥控ACU-1000控制):
图3:说明一台用于传输话音的NXU-2通过一台控制电脑和一台远端的ACU-1000进行数字通信的一个的应用。利用本地电脑通过一对无线LAN发送/接收单元进行远端ACU/NXU通讯。该电脑需配备有两套软件:NXU控制软件在同NXU-2通讯时运行并管理着连接状态以及提供ACU完全控制的ACU控制软件。位于指挥部电脑旁的操作者能够控制ACU并监控它的工作状态,同时还可以利用它发送和接收话音。 |
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3、MULTIPLE RADIO CONTROL (多台ACU-1000控制):
图4:这是一个多台电脑控制多台ACU-1000的系统。若每台设备相距几百英尺,就可以如图所示地利用一个带有以太网集线器和CAT 5电缆的LAN将它们连接 起来。如果一些设备必须被放置在其他地点,一个WAN将可以替代以太网络集线器。电脑在Windows界面下运行NXU和ACU控制软件包。 |
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4、MULTIPLE RADIO CONTROL (多台电台控制):
图5:说明多台远端位置的收发信机通过网络连接到一台分配的电脑上的通讯应用。该电脑运行NXU控制软件,该软件允许操作者管理在网络中任何一台无线电台的连接情况。 |
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二、NETWORK DETAILS (网络详情): The NXU-2 is an 10BASE-T Ethernet device and each unit has a unique Ethernet address and an RJ-45 physical interface jack. A 10BASE-T device operaters at 10Mbps and interconnects to a hub(star topology) using standard CAT 5 twisted pair cable. The maximum cable length between an NXU-2 and its hub port is 100 meters. With the right connective equipment(recommended or supplied by JPS), the NXU-2's Ethernet port can be linked up virtually any other kind of LAN, WAN, or the Internet, no matter which topology or cabling system is in use. NXU-2是一台10BASE-T以太网络设备,每一台设备都具有各自唯一的以太网络地址和一个RJ-45物理接口插头。一台10BASE-T设备在10Mbps下操作并采用标准的CAT 5双绞线连接到一个集线器上。一台NXU-2和它的集线器端口之间的最大长度为100米。利用正确的连接设备(由JPS公司推荐或提供),NXU-2以太网络接口可以同无论是何种拓扑结构或电缆系统的LAN,WAN或互联网连接。 三、SYSTEM OVERVIEW (系统总揽): Any NXU-2 can be set up as a sever or a client depending on system needs. The RS-232 connection allows for different baud rates between the sever and client. The NXU-2 monitors its network connection and adiusts its parameters automatically to provide optimum performance under varying network conditions. Front Panel indicators display the unit's status. Initial configuration is done throught the NXU-2's serial port, but once set up, a standard web browser can be used over the unit's settings and to perform diagnostics. The NXU-2 provides a number of different voice compression settings to accommodate a wide range of applications from voice-only to voice plus tone signalling. Designed for years of continuous operation in mission-critical applications and remote locations, the NXU-2 has no moving parts and requires no periodic shutdown or maintenance. Start up upon power on is typically 5 seconds. |
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四、SPECIFICATIONS (技术规范): | |
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