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    NXU-2A Operations Manual 

 

Interoperability Now! 

2-3

 

 

2.5

 

Installation Considerations 

Careful attention to the following installation suggestions should result in the best unit/system 
performance.  Figure 2-1 provides overall unit dimensions. 

The  NXU-2A  must  be  installed  in  a  structure  that  provides  both  protection  from  the  weather 
and  assurance  of  ambient  temperatures  between  -10  and  +55  degrees  C.    Since  the  unit  is 
neither  splash  proof  nor  corrosion  resistant,  it  must  be  protected  from  exposure  to  salt  spray.  
When the unit is mounted in a cabinet with other heat-generating equipment, the use of a rack 
blower is suggested to keep the cabinet interior temperature rise to a minimum. 

NOTE:

 

If the NXU-2A is installed in a high RF environment such as repeater 

system or other transmitter site, it is recommended that all cable assemblies be 
individually shielded, with the shield grounded to the ground pin on the terminal 
block  for  that  module.    For  all  D-subminiature  connector  cable  assemblies, 
cable  shields  should  be  connected  to  connector  shells  so  that  they  make 
contact with the grounded D-subminiature connector shells on the NXU-2A. 

 

NOTE:

 

For the DC input, the plug is the equipment disconnect device. 

REMARQUE: 

Pour  deconnecter  le  DC,  retirez  la  prise  qui  est  couramment 

connecte a l'equipement. 

 

Содержание NXU-2A

Страница 1: ...on and Operation Manual NXU 2A Network Extension Unit JPS Interoperability Solutions 5800 Departure Drive Raleigh NC 27616 919 790 1011 Email sales jpsinterop com support jpsinterop com www jpsinterop...

Страница 2: ...s likely to cause harmful interference in which case users will be required to correct the interference at their own expense CAUTION Changes or modifications to this equipment not expressly approved b...

Страница 3: ...t Point 2 8 2 8 3 Connection to Radio or Other Four Wire Device J7 2 8 2 8 4 Network Connection J3 2 8 2 8 5 Serial Port Connection J4 2 9 2 8 6 Connecting Equipment and Computers to an NXU 2A 2 9 3 C...

Страница 4: ...X Outputs 3 16 4 OPERATION 4 1 4 1 GENERAL 4 1 4 2 FRONT PANEL INDICATORS 4 1 4 2 1 Power LED 4 1 4 2 2 Link Active LED 4 1 4 2 3 Channel Active LED 4 1 4 2 4 Audio Input LED 4 1 4 3 REAR PANEL CONNEC...

Страница 5: ...U 2A SETUP SCREEN 3 12 FIGURE 3 3 NXU 2A TERMINAL SCREEN 3 13 FIGURE 3 4 NXU 2A HISTORY SCREEN 3 14 FIGURE 3 5 NETWORK CONFIGURATION SCREEN 3 15 FIGURE 4 1 NXU 2A CONNECTION MANAGEMENT SCREEN 4 4 FIGU...

Страница 6: ...Local Area Network A group of computers and associated devices that share a common communications line typically within a small geographic area PTT Push to talk A signal to a radio transmitter which c...

Страница 7: ...equirement for pilot tones and other in band signaling Facilitates centralized control of a communications network from a single computer 1 2 2 NXU 2A Description The NXU 2A is intended for use with r...

Страница 8: ...2A is a 10 100BASE T Ethernet device and each unit has a unique Ethernet address and an RJ 45 physical interface jack A 10 100BASE T device operates at either 10 or 100 Mbps and interconnects to an Et...

Страница 9: ...te audio console The transmit receive audio and PTT COR signals are transported digitally across the network and appear at the other end The network data transfer is transparent to the user and the op...

Страница 10: ...cuit Voltage 60 VDC Serial Interface Interface Type RS 232 Asynchronous Full Duplex Baud Rates 300 1200 2400 4800 9600 19200 38400 57600 115200 bps Connector DB 9 Male Standard PC AT DCE Pinout Networ...

Страница 11: ...080000 RS 232 Serial Cable 6 ft 1 0313 080515 Audio Crossover Adapter 1 7 Optional Equipment Not Supplied Table 1 3 Optional Equipment Not Supplied Description JPS P N Operation Maintenance Manual pri...

Страница 12: ...NXU 2A Operations Manual 1 6 Interoperability Now This Page Left Intentionally Blank...

Страница 13: ...odel and Serial Numbers Shipping Agency Date s of Shipment The JPS Customer Service Department can be reached by phone at 919 790 1011 by fax at 919 790 1456 Upon receipt of this information JPS will...

Страница 14: ...ubnet mask and if applicable the gateway address for the unit You may have to contact the network administrator for your organization to obtain this information NOTE Operation of the NXU 2A is not pos...

Страница 15: ...with other heat generating equipment the use of a rack blower is suggested to keep the cabinet interior temperature rise to a minimum NOTE If the NXU 2A is installed in a high RF environment such as r...

Страница 16: ...NXU 2A Operations Manual 2 4 Interoperability Now Figure 2 1 Outline Dimensions...

Страница 17: ...NXU 2A Operations Manual Interoperability Now 2 5 Figure 2 2 Control and Connector Locations...

Страница 18: ...nternal Configuration The illustration below shows the NXU 2A with its top cover and rear panel removed There is normally no reason to remove the top cover as the NXU 2A has no internal user serviceab...

Страница 19: ...uptible power system UPS If the overall site does not have UPS capability the NXU 2A should be plugged into a smaller UPS such as those used for personal computer systems 2 7 Installation Checklist Ta...

Страница 20: ...e using a cable specifically designed to connect an ACU 1000 to that radio The adapter makes the NXU 2A audio connector pinout match the one found on the ACU 1000 If you are wiring your own cable or i...

Страница 21: ...a crossover cable RS 232 serial devices are divided into two types Devices which provide control information are called DTE Data Terminal Equipment devices Devices which accept control information ar...

Страница 22: ...Cable RS232 Null Modem Cable RS232 Null Modem Cable RS232 Straight Through Cable RS232 Null Modem Cable DTE Device DTE Device DTE Device DCE Device DCE Device DCE Device COMP NXU 2 NXU 2 ACU 1000 J4...

Страница 23: ...he above network parameters are compatible with your network then you may attach the NXU 2A to your network and use your web browser or telnet client to configure the NXU 2A as outlined in Section 3 6...

Страница 24: ...on 3 5 2 3 3 1 Configuration Using an RS 232 Terminal Program A terminal program is needed to communicate with the NXU 2A for initial configuration A suitable Windows terminal program MTTTY EXE is inc...

Страница 25: ...our terminal program and they appear on the screen the NXU 2A is already in the COMMAND Mode Configuration Mode Command Set Type HELP and press the ENTER key The NXU 2A should respond with NXU 2A Comm...

Страница 26: ...the serial port data bits DISC Break this client s current connection DUPLEX 0 1 Select either full duplex 0 or half duplex 1 for audio ECHO ON OFF Enables disables character echo to console GATEIP i...

Страница 27: ...ld type MYIP 192 168 1 1 and press ENTER 3 3 4 Setting Unit Subnet Mask and Gateway Address Now set your subnet mask using the SUBNET command If you are using a gateway set the gateway address the add...

Страница 28: ...nd allows you to select the polarity of the COR input If a COR output signal is not available you may select VOX Voice Operated Switching VOX operation uses the detection of an audio signal from your...

Страница 29: ...g and vice versa Consider what can happen when the switch out of the TX mode causes a momentary active COR output Radio 1 COR becomes deactivated so the Radio 2 switches out of the TX mode and activat...

Страница 30: ...est of the ADPCM compression types 5 PCM 64Kbps Suitable for voice or tone signaling Offers the highest quality of all compression methods but provides the least compression You should use this method...

Страница 31: ...rest 100mS interval When additional delay is used the received audio will be delayed before being sent to the network 3 3 20 VMR Voice Modulation Recognition has been added to allow interfacing with r...

Страница 32: ...ocess agent is enabled and running but may be disabled by changing the SECURITY Setting see section on SECURITY The Management Information Database MIB associated with the NXU 2A may be obtained by co...

Страница 33: ...nsists of a multicast UDP channel for VoIP and status bit traffic No serial traffic is exchanged It can be used whenever more than two units wish to hear each other s audio The NXU 2A communications m...

Страница 34: ...ration Using the NXU 2A Setup Utility Included with the NXU 2A is a CD containing a program called NXU 2 Setup Utility This program which runs under Windows 95 98 NT 2000 or XP can be copied to the us...

Страница 35: ...nfiguration information in the NXU 2A The NXU 2A will restart and the new settings will then be in effect The NXU 2A Setup Utility allows the user to see the actual commands being sent to and received...

Страница 36: ...below To add the current unit to the configuration history type a name for the unit into the box beside the Add Current button and click the button The NXU 2A will be added to the list of units shown...

Страница 37: ...on 3 3 except that there is no need to type to enter command mode The telnet connection to the NXU 2A will automatically disconnect after two minutes of no activity or LOGOUT may be typed to disconnec...

Страница 38: ...sible from the rear panel This output provides a 0 dBm nominal level 15 dBm clipping into a 600 ohm load The audio output will supply signal levels from 30 to 11 dBm 3 7 4 COR Input The COR input to t...

Страница 39: ...e an active VoIP connection or the connection has been lost 4 2 3 Channel Active LED This green LED is lit whenever COR is active This also indicates that the NXU 2A is sending audio data across the I...

Страница 40: ...an AC voltmeter to the test point TP1 on the real panel and adjusting the IN LVL control for an average audio level of about 0 2V or 12dBm 4 4 3 COR Input Description The COR input on J7 controls the...

Страница 41: ...lly the NXU 2A client automatically connects to the preprogrammed NXU 2A server when power is applied The user may also manually control the connection state of the NXU 2A client This can be done via...

Страница 42: ...ontrol The NXU 2A client connection may be managed by browsing to the NXU 2A client IP address and selecting the Connection Management menu option The user may then issue connect or disconnect command...

Страница 43: ...example setting the security level to 136 128 8 disables both telnet and HTTP access Setting security to 96 64 32 allows the connection status to be monitored by HTTP but no configuration or connecti...

Страница 44: ...Network Password Dialog In order to access the NXU 2A you must enter the password that was previously programmed using the PASS command The User Name is not required you may enter anything or nothing...

Страница 45: ...ke sure you wait at least 5 seconds and then type three plus signs within 1 second Settings made in Command Mode do not appear to take effect You must issue a SAVE command after making changes in orde...

Страница 46: ...VE indicator is on continuously Verify that the COR polarity is programmed properly See section 3 3 8 If NXU 2A is attached to a radio COR line make sure the radio squelch is set properly Audio has pa...

Страница 47: ...e TCP overhead Can I use the NXU 2A on a dialup connection No The NXU 2A s network connection is via Ethernet Most dialup telephone line modems only provide RS 232 connections but even if an Ethernet...

Страница 48: ...empt to close the IP connection which may take several seconds Then it has to open a new connection This process may take 30 to 45 seconds depending on your network What is the difference between a st...

Страница 49: ...ausing network errors The extreme case would be if an NXU 2A is programmed to have the same IP address as an existing computer on the same network This would likely render that computer unusable for n...

Страница 50: ...h it between the single public IP address it holds and the private IP addresses used by devices on its network This means that no computers behind the NAT router are directly accessible from outside t...

Страница 51: ...gnal into a digital format There are times when the user may want or need higher voice quality or transparency to certain kinds of signaling tones The VOCODER command allows the selection of different...

Страница 52: ...en type three plus signs and nothing else If you type more than three plus signs the procedure won t work Wait a few seconds and try again In addition the three plus signs must be typed within a one s...

Страница 53: ...area of memory with the unit s DSP processor allowing data to be exchanged between the two processors quickly and easily When the network processor sees the unit s COR input line go active it collect...

Страница 54: ...NXU 2A Operations Manual 7 2 Interoperability Now This Page Left Intentionally Blank...

Страница 55: ...6 DTE Versus DCE Serial Cables 2 10 Duplex Setting 3 6 E Equipment and Accessories Supplied 1 5 Ethernet MAC Address 3 8 F Factory Defaults 3 9 Front Panel 4 1 G General Information 1 1 Glossary 1 6 I...

Страница 56: ...t Settings 3 7 Setting Unit IP Address 3 5 Setup Utility 3 2 Specifications 1 4 T TCP 1 6 Telnet Control 4 3 Theory Of Operation 7 1 Troubleshooting 5 1 TX Delay 3 9 U UDP 1 6 Unpacking and Inspection...

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