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 |
|
to be interconnected across the room or around the world. NXU-2采用VoIP技術發送與接收數字話音信號。VoIP是指話音通過互聯網協議傳輸,它是一種將話音信號數字化的方式,并將其通過數字網絡加以傳輸。這一數字網絡可以是LAN(局域網),WAN(廣域網)或是互聯網。 | |
ADVANTAGES (NUX-2的優點):
|
|
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. |
|
圖1:基本的NXU-2結構圖
|
|
一、APPLICATIONS (應用): 1、SIMPLE NXU-2 RADIO YSTEM (單一NXU-2無線通信系統) 圖2:舉例說明單個通訊收發信機通過一個網絡與遠端話音控制臺連接的一個基本的NXU-2的應用。發射/接收的話音和PTT/COR信號被數字化地通過網絡傳輸,并且清晰地出現在另一端。在話音控制臺的操作者使用遠端的無線電臺就好像電臺就在身邊一樣。 |
|
2、REMOTE ACU-1000 CONTROL (遙控ACU-1000控制): 圖3:說明一臺用于傳輸話音的NXU-2通過一臺控制電腦和一臺遠端的ACU-1000進行數字通信的一個的應用。利用本地電腦通過一對無線LAN發送/接收單元進行遠端ACU/NXU通訊。該電腦需配備有兩套軟件:NXU控制軟件在同NXU-2通訊時運行并管理著連接狀態以及提供ACU完全控制的ACU控制軟件。位于指揮部電腦旁的操作者能夠控制ACU并監控它的工作狀態,同時還可以利用它發送和接收話音。 |
|
3、MULTIPLE RADIO CONTROL (多臺ACU-1000控制): 圖4:這是一個多臺電腦控制多臺ACU-1000的系統。若每臺設備相距幾百英尺,就可以如圖所示地利用一個帶有以太網集線器和CAT 5電纜的LAN將它們連接 起來。如果一些設備必須被放置在其他地點,一個WAN將可以替代以太網絡集線器。電腦在Windows界面下運行NXU和ACU控制軟件包。 |
|
4、MULTIPLE RADIO CONTROL (多臺電臺控制): 圖5:說明多臺遠端位置的收發信機通過網絡連接到一臺分配的電腦上的通訊應用。該電腦運行NXU控制軟件,該軟件允許操作者管理在網絡中任何一臺無線電臺的連接情況。 |
|
二、NETWORK DETAILS (網絡詳情): 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是一臺10BASE-T以太網絡設備,每一臺設備都具有各自唯一的以太網絡地址和一個RJ-45物理接口插頭。一臺10BASE-T設備在10Mbps下操作并采用標準的CAT 5雙絞線連接到一個集線器上。一臺NXU-2和它的集線器端口之間的最大長度為100米。利用正確的連接設備(由JPS公司推薦或提供),NXU-2以太網絡接口可以同無論是何種拓撲結構或電纜系統的LAN,WAN或互聯網連接。 三、SYSTEM OVERVIEW (系統總攬): 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. |
|
四、SPECIFICATIONS (技術規范): | |
點擊這里打開圖表 |