Critical Communications: Dispatch

Question How do I set up IP-223 to RTS Intercom System?   Answer See attached           © Copyright Bosch Security Systems All rights reserved. Text, images, graphics, sound, animations and videos as well as the arrangement of the same in Bosch offline knowledgebase (help file) are protected by copyright and other intellectual property rights. The content of these offline knowledgebase may not be copied, disseminated, altered or made accessible to third parties for commercial purposes. Some Bosch web sites may also contain text, images, graphics, sound, animations and videos subject to third party copyrights. Warranty Note This information is provided by Bosch Security Systems ''AS IS'' and without warranty of any kind, expressed or implied, including (but not limited to) any implied warranties of merchantability, fitness for any particular purpose or non-infringement. While the information provided in believed to be accurate, it may include errors or inaccuracies. Bosch Security Systems will not be liable for any damages of any kind arising from use of this tool, including, but not limited to, direct, indirect, incidental, punitive and consequential damages.  

Question Can I setup for MDC-1200 Encode and Operation?   Answer Yes, see attached           © Copyright Bosch Security Systems All rights reserved. Text, images, graphics, sound, animations and videos as well as the arrangement of the same in Bosch offline knowledgebase (help file) are protected by copyright and other intellectual property rights. The content of these offline knowledgebase may not be copied, disseminated, altered or made accessible to third parties for commercial purposes. Some Bosch web sites may also contain text, images, graphics, sound, animations and videos subject to third party copyrights. Warranty Note This information is provided by Bosch Security Systems ''AS IS'' and without warranty of any kind, expressed or implied, including (but not limited to) any implied warranties of merchantability, fitness for any particular purpose or non-infringement. While the information provided in believed to be accurate, it may include errors or inaccuracies. Bosch Security Systems will not be liable for any damages of any kind arising from use of this tool, including, but not limited to, direct, indirect, incidental, punitive and consequential damages.  

Question How do I set up the DSP-223 for Optimum PTT Decoding?   Answer Figure 1 - A typical legacy analog radio system with a DSP-223 The most critical audio signal level in a legacy analog radio system, is the level of transmit audio from the console. It produces a signal that needs to be within a certain range as it arrives at the DSP-223/radio end of the system. Tone Remote Control (TRC) signaling must be within a certain level window, in order for the DSP-223 to decode it properly and reliably. With normal console functionality, the TRC levels and voice levels are calibrated relative to each other. Adjustment of the composite signal level at the console is sometimes necessary to compensate for line losses in the system. Figure 2 - Diagram of a Tone Remote Control burst Calibration of levels is primarily referenced to the Low Level Guard Tone (LLGT), it is typically -20 dBm. Voice then will fall into the window of approximately -20 to 0.0 dBm. The "Line RX" level pot on the front of the DSP-223 adjusts the Tx audio level coming in from the console. The DSP-223 sees audio from the console as "Line RX Audio".  This audio is then transferred by the DSP-223 to the radio via the Radio Tx line. The Radio Tx level adjustment potentiometer determines the level going into the radio, and thus, transmitter deviation. So decoder input and transmitter deviation are independently adjusted.   To find the optimum level for reliable PTT, first insure that the LLGT level is approximately -20 dbm at the input to the DSP-223. Some Motorola legacy consoles may produce a LLGT lower than -20, but the DSP-223 can work at lower levels if adjusted carefully.   Start with the Rx line level potentiometer at a low level (full ccw) and gradually increase it until the unit begins to decode the tone bursts, and indicated by the PTT led on the front panel. Repeated key ups are required while finding this point as the unit will not key off of just the LLGT itself. It requires the complete tone burst, which occurs then the PTT button is pushed on the console, to initialize a key up sequence. Key up the console at one or two second intervals while moving the Line Rx Level potentiometer, in order to determine the full range of decoding, which will occur over a portion of the potentiometers rotational range. The final set point should be approximately in the center of the arc where the decoding works. This helps insure that if the leased line electrical characteristics shift, as they typically will, the decoding of PTTs will continue to be reliable.               © Copyright Bosch Security Systems All rights reserved. Text, images, graphics, sound, animations and videos as well as the arrangement of the same in Bosch offline knowledgebase (help file) are protected by copyright and other intellectual property rights. The content of these offline knowledgebase may not be copied, disseminated, altered or made accessible to third parties for commercial purposes. Some Bosch web sites may also contain text, images, graphics, sound, animations and videos subject to third party copyrights. Warranty Note This information is provided by Bosch Security Systems ''AS IS'' and without warranty of any kind, expressed or implied, including (but not limited to) any implied warranties of merchantability, fitness for any particular purpose or non-infringement. While the information provided in believed to be accurate, it may include errors or inaccuracies. Bosch Security Systems will not be liable for any damages of any kind arising from use of this tool, including, but not limited to, direct, indirect, incidental, punitive and consequential damages.

Question How do I set up Repeater Mode Linking using two DSP-223s?   Answer Two DSP-223s are capable of creating RF links from console to remote base stations/repeaters, with the use of Repeater Mode. Repeater Mode introduces a 400 Ms delay in the TX path, and removes the Hold Tone/LLGT notch filter. When the DSP-223 at the far end detects the tone sequence, it PTTs the Base Station/Repeater, and passes TX audio, which is broadcast. As long as the hold tone is detected, it will hold the channel open. The reverse takes place with a receive signal present at the base station/repeater. This allows an RF link to be established with two mobile radios and two DSP-223s.  This can be useful as either a primary or backup link. This diagram shows two mobile radios configured to talk to each other.  They are connected to an analog console, and use Tone signaling. This allows control of the base station/repeater with Tone control.       To activate repeater mode, download the current configuration, check the “Repeater Mode” checkbox in the software, and write it back to the DSP-223.                 © Copyright Bosch Security Systems All rights reserved. Text, images, graphics, sound, animations and videos as well as the arrangement of the same in Bosch offline knowledgebase (help file) are protected by copyright and other intellectual property rights. The content of these offline knowledgebase may not be copied, disseminated, altered or made accessible to third parties for commercial purposes. Some Bosch web sites may also contain text, images, graphics, sound, animations and videos subject to third party copyrights. Warranty Note This information is provided by Bosch Security Systems ''AS IS'' and without warranty of any kind, expressed or implied, including (but not limited to) any implied warranties of merchantability, fitness for any particular purpose or non-infringement. While the information provided in believed to be accurate, it may include errors or inaccuracies. Bosch Security Systems will not be liable for any damages of any kind arising from use of this tool, including, but not limited to, direct, indirect, incidental, punitive and consequential damages.  

Question How can I troubleshoot IP Console and Gateway Audio Transport Across a Network?   Answer On initial set up of a console system, often the most frequent problem is the failure of Consoles and IP-223s to communicate across the network.  Common causes of this are: Typos in addressing, such as multicast addresses and port numbers not matching on end to end devices. Firewall turned "ON" in console computers Multicast being blocked across the network due to router settings, etc Use of the Telex “VU Meter” program (download at http://www.telex.com/us/dispatch/file?i=97544&lg=eng) is an excellent and quick way to determine if data is present on the correct port numbers. Open VU Meter with the appropriate multicast address and port number entered in the blanks. Turn the program on. Send a test call on the TX or RX port numbers and see if VU Meter indicates digital audio activity. You may open multiple instances of VU Meter to simultaneously monitor TX and RX port numbers.  Verification that audio data is being sent out on the correct address, but not arriving at the far end of the network may indicate a problem with network configurations, that is, blocking of multicast traffic. Please note that some newer switches are intelligent enough to contain routing functions, which can be unintentionally enabled in some situations.           © Copyright Bosch Security Systems All rights reserved. Text, images, graphics, sound, animations and videos as well as the arrangement of the same in Bosch offline knowledgebase (help file) are protected by copyright and other intellectual property rights. The content of these offline knowledgebase may not be copied, disseminated, altered or made accessible to third parties for commercial purposes. Some Bosch web sites may also contain text, images, graphics, sound, animations and videos subject to third party copyrights. Warranty Note This information is provided by Bosch Security Systems ''AS IS'' and without warranty of any kind, expressed or implied, including (but not limited to) any implied warranties of merchantability, fitness for any particular purpose or non-infringement. While the information provided in believed to be accurate, it may include errors or inaccuracies. Bosch Security Systems will not be liable for any damages of any kind arising from use of this tool, including, but not limited to, direct, indirect, incidental, punitive and consequential damages.  

Question How do I activate paging sidetone on the VoIP consoles?   Answer If your VoIP console does not generate sidetone with paging or DTMF, check the DTMF sidetone box in the System 1 Setup page of the web browser.            © Copyright Bosch Security Systems All rights reserved. Text, images, graphics, sound, animations and videos as well as the arrangement of the same in Bosch offline knowledgebase (help file) are protected by copyright and other intellectual property rights. The content of these offline knowledgebase may not be copied, disseminated, altered or made accessible to third parties for commercial purposes. Some Bosch web sites may also contain text, images, graphics, sound, animations and videos subject to third party copyrights. Warranty Note This information is provided by Bosch Security Systems ''AS IS'' and without warranty of any kind, expressed or implied, including (but not limited to) any implied warranties of merchantability, fitness for any particular purpose or non-infringement. While the information provided in believed to be accurate, it may include errors or inaccuracies. Bosch Security Systems will not be liable for any damages of any kind arising from use of this tool, including, but not limited to, direct, indirect, incidental, punitive and consequential damages.  

Question What does Dispatch products due in the cases of missed packets (lost due to jitter or errors)?   Answer The products have a jitter buffer that allows for packets to be reordered if delivered out of sequence, if this buffer empties due to lost packets the unit will stop and restart once the "Packet delay before playback" buffer is filled.   The product looks at the source and destination address, when a correct incoming port number is recognized the unit will lock in on that source address an ignore packets coming from another source address until the first source stops sending then the second source has access. There is no protection against multiple packets from the same source address with the same multicast and port numbers as this shouldn't happen.  Add to this the same sequence bit in the packet (echoes) should never be allowed. Packets not received or lost before their play sequence (bit) time in the buffer are lost and next packets in the buffer pulled in.           © Copyright Bosch Security Systems All rights reserved. Text, images, graphics, sound, animations and videos as well as the arrangement of the same in Bosch offline knowledgebase (help file) are protected by copyright and other intellectual property rights. The content of these offline knowledgebase may not be copied, disseminated, altered or made accessible to third parties for commercial purposes. Some Bosch web sites may also contain text, images, graphics, sound, animations and videos subject to third party copyrights. Warranty Note This information is provided by Bosch Security Systems ''AS IS'' and without warranty of any kind, expressed or implied, including (but not limited to) any implied warranties of merchantability, fitness for any particular purpose or non-infringement. While the information provided in believed to be accurate, it may include errors or inaccuracies. Bosch Security Systems will not be liable for any damages of any kind arising from use of this tool, including, but not limited to, direct, indirect, incidental, punitive and consequential damages.  

Question Does Telex Communications still make and support the above products?  Can I still get support information?   Answer Edat, Xgen, Zing is no longer a Telex/Bosch product.  The product line was acquired by The Arrington Group, Audio Visual at 918-779-7572 www.tagav.com or email at info@tagav.com          © Copyright Bosch Security Systems All rights reserved. Text, images, graphics, sound, animations and videos as well as the arrangement of the same in Bosch offline knowledgebase (help file) are protected by copyright and other intellectual property rights. The content of these offline knowledgebase may not be copied, disseminated, altered or made accessible to third parties for commercial purposes. Some Bosch web sites may also contain text, images, graphics, sound, animations and videos subject to third party copyrights. Warranty Note This information is provided by Bosch Security Systems ''AS IS'' and without warranty of any kind, expressed or implied, including (but not limited to) any implied warranties of merchantability, fitness for any particular purpose or non-infringement. While the information provided in believed to be accurate, it may include errors or inaccuracies. Bosch Security Systems will not be liable for any damages of any kind arising from use of this tool, including, but not limited to, direct, indirect, incidental, punitive and consequential damages.  

Question Why doesn't my EF Johnson 5300SLES radio power up when using the cable documented in the manual?   Answer EF Johnson Remote Cable Assembly P/N-597-2002-245 is required for RS series radios (connected to J6 and J8 on the Logic PCB). EF Johnson Remote Cable Assembly P/N-597-5357-746 is required for EFJ 53ES series radios, including all EFJ 5300SL and EFJ 5300SL ES radios   Thess can be purchased from EF Johnson.           © Copyright Bosch Security Systems All rights reserved. Text, images, graphics, sound, animations and videos as well as the arrangement of the same in Bosch offline knowledgebase (help file) are protected by copyright and other intellectual property rights. The content of these offline knowledgebase may not be copied, disseminated, altered or made accessible to third parties for commercial purposes. Some Bosch web sites may also contain text, images, graphics, sound, animations and videos subject to third party copyrights. Warranty Note This information is provided by Bosch Security Systems ''AS IS'' and without warranty of any kind, expressed or implied, including (but not limited to) any implied warranties of merchantability, fitness for any particular purpose or non-infringement. While the information provided in believed to be accurate, it may include errors or inaccuracies. Bosch Security Systems will not be liable for any damages of any kind arising from use of this tool, including, but not limited to, direct, indirect, incidental, punitive and consequential damages.  

Question How do I set up TETRA Dispatch Solutions via Sepura Terminal Interface?   Answer See attached           © Copyright Bosch Security Systems All rights reserved. Text, images, graphics, sound, animations and videos as well as the arrangement of the same in Bosch offline knowledgebase (help file) are protected by copyright and other intellectual property rights. The content of these offline knowledgebase may not be copied, disseminated, altered or made accessible to third parties for commercial purposes. Some Bosch web sites may also contain text, images, graphics, sound, animations and videos subject to third party copyrights. Warranty Note This information is provided by Bosch Security Systems ''AS IS'' and without warranty of any kind, expressed or implied, including (but not limited to) any implied warranties of merchantability, fitness for any particular purpose or non-infringement. While the information provided in believed to be accurate, it may include errors or inaccuracies. Bosch Security Systems will not be liable for any damages of any kind arising from use of this tool, including, but not limited to, direct, indirect, incidental, punitive and consequential damages.  

Question How can I set up IP-223 Remote Adapter Panel to control Kenwood TK-863 radio?   Answer See attached           © Copyright Bosch Security Systems All rights reserved. Text, images, graphics, sound, animations and videos as well as the arrangement of the same in Bosch offline knowledgebase (help file) are protected by copyright and other intellectual property rights. The content of these offline knowledgebase may not be copied, disseminated, altered or made accessible to third parties for commercial purposes. Some Bosch web sites may also contain text, images, graphics, sound, animations and videos subject to third party copyrights. Warranty Note This information is provided by Bosch Security Systems ''AS IS'' and without warranty of any kind, expressed or implied, including (but not limited to) any implied warranties of merchantability, fitness for any particular purpose or non-infringement. While the information provided in believed to be accurate, it may include errors or inaccuracies. Bosch Security Systems will not be liable for any damages of any kind arising from use of this tool, including, but not limited to, direct, indirect, incidental, punitive and consequential damages.  

Question What is the latest firmware for the DSP-223? Where is the latest firmware for the DSP-223?   Answer The latest firmware for the DSP-223 is 2.7. The latest Winapplication for the DSP-223 is 2.8 The versions 2.7 and 2.8 are compatible. You can find the firmware located at http://www.telex.com Please note: You will have to have an approved account to download the firmware. Please click here to make a download request http://www.telex.com/us/dispatch/account?f=DSP223%20v2.8%20load%20pack After approval you will then be able to download the firmware here. http://www.telex.com/us/dispatch/product/DSP-223_/1104 You will want to download the file named "DSP223 V2.8 load pack"               © Copyright Bosch Security Systems All rights reserved. Text, images, graphics, sound, animations and videos as well as the arrangement of the same in Bosch offline knowledgebase (help file) are protected by copyright and other intellectual property rights. The content of these offline knowledgebase may not be copied, disseminated, altered or made accessible to third parties for commercial purposes. Some Bosch web sites may also contain text, images, graphics, sound, animations and videos subject to third party copyrights. Warranty Note This information is provided by Bosch Security Systems ''AS IS'' and without warranty of any kind, expressed or implied, including (but not limited to) any implied warranties of merchantability, fitness for any particular purpose or non-infringement. While the information provided in believed to be accurate, it may include errors or inaccuracies. Bosch Security Systems will not be liable for any damages of any kind arising from use of this tool, including, but not limited to, direct, indirect, incidental, punitive and consequential damages.  

Question How can I create an appealing C-Soft design?   Answer When our customers design their C-Soft consoles, often times the functionality of the designs are good but the appearance has a lot to be desired. Here are some basic tips on how to make a design that has a much more professional look, promotes dispatcher efficiency and operational accuracy, as well as cuts down on visual fatigue. - Use a uniform style and size on the design, as is appropriate.  Avoid mismatched font sizes. - Use contrasting colors for text and background colors.  Similar colors are difficult to read. - Use symetry in the overall design for a neat, balanced appearance. - Take advantage of the choices in global button styles.  - Use complementary colors in the design.  If in doubt, use a color wheel to choose compatible colors. - Take advantage of pop-up windows to conserve console real estate. - Take advantage of C-Soft's capabilities to add image files to the display background. Two examples of the same C-Soft design are shown below.  One is the way it was received from a customer (except the names have been changed). The second example is the same design that has been modified cosmetically only, except for the addition of mute buttons.  The difference speaks for itself. Figure 1 - The beginning design. Figure 2 - The improved design           © Copyright Bosch Security Systems All rights reserved. Text, images, graphics, sound, animations and videos as well as the arrangement of the same in Bosch offline knowledgebase (help file) are protected by copyright and other intellectual property rights. The content of these offline knowledgebase may not be copied, disseminated, altered or made accessible to third parties for commercial purposes. Some Bosch web sites may also contain text, images, graphics, sound, animations and videos subject to third party copyrights. Warranty Note This information is provided by Bosch Security Systems ''AS IS'' and without warranty of any kind, expressed or implied, including (but not limited to) any implied warranties of merchantability, fitness for any particular purpose or non-infringement. While the information provided in believed to be accurate, it may include errors or inaccuracies. Bosch Security Systems will not be liable for any damages of any kind arising from use of this tool, including, but not limited to, direct, indirect, incidental, punitive and consequential damages.  

Question How can I reset the ADHB-4 if I can't access it from the web page?   Answer From the front panel of the ADHB-4 press "System Tools", when you see the system info screen press the gray buttons in one of the following orders: To reset only the password the code is 1131213 To reset the unit to factory the code is 3112312 Button 1 is the far left with 4 being the far right, when you have entered the correct sequence the display will ask if you want to reset defaults, enter "Yes"           © Copyright Bosch Security Systems All rights reserved. Text, images, graphics, sound, animations and videos as well as the arrangement of the same in Bosch offline knowledgebase (help file) are protected by copyright and other intellectual property rights. The content of these offline knowledgebase may not be copied, disseminated, altered or made accessible to third parties for commercial purposes. Some Bosch web sites may also contain text, images, graphics, sound, animations and videos subject to third party copyrights. Warranty Note This information is provided by Bosch Security Systems ''AS IS'' and without warranty of any kind, expressed or implied, including (but not limited to) any implied warranties of merchantability, fitness for any particular purpose or non-infringement. While the information provided in believed to be accurate, it may include errors or inaccuracies. Bosch Security Systems will not be liable for any damages of any kind arising from use of this tool, including, but not limited to, direct, indirect, incidental, punitive and consequential damages.  

Question I'm getting "MYSQL server has gone away." message when using Telex Database Reviewer program, why?   Answer Here's some information on that particular error message.  http://dev.mysql.com/doc/refman/5.0/en/gone-away.html We believe that the server has closed the connection to the Network Recorder due to eight hours of inactivity. Let's try increasing that variable to its maximum value. 1. In notepad, open my.ini  located at  E:\MySQL Server 5.0   or at C:\Program Files\MySQL\MySQL Server 5.0 2. Add a line somewhere under the [mysqld] header with the following text: wait_timeout=2147483 3. Restart the mysql service using Computer Management's Service list. 4. If you wish to verify that the value was set properly, open a command prompt and navigate to      E:\MySQL Server 5.0/bin. Run the following command:     mysqladmin.exe variables      You should see a long list of variables, including wait_timeout. It should have the newly set value.                     © Copyright Bosch Security Systems All rights reserved. Text, images, graphics, sound, animations and videos as well as the arrangement of the same in Bosch offline knowledgebase (help file) are protected by copyright and other intellectual property rights. The content of these offline knowledgebase may not be copied, disseminated, altered or made accessible to third parties for commercial purposes. Some Bosch web sites may also contain text, images, graphics, sound, animations and videos subject to third party copyrights. Warranty Note This information is provided by Bosch Security Systems ''AS IS'' and without warranty of any kind, expressed or implied, including (but not limited to) any implied warranties of merchantability, fitness for any particular purpose or non-infringement. While the information provided in believed to be accurate, it may include errors or inaccuracies. Bosch Security Systems will not be liable for any damages of any kind arising from use of this tool, including, but not limited to, direct, indirect, incidental, punitive and consequential damages.  

Question How do I reset the Network Recorder SQL password?   Answer This article applys to NR-V2 Telex branded servers. You will need to be logged into the compuer as the administrator to complete the following steps. If you are unsure on how to complete these steps then please call our technical support at 1-800-898-6723 Here are the steps to clear the password: 1. Stop the MySQL501 Service 2. Open a file browser to E:\MySQL Server 5.0\data. Rename the ‘mysql’ directory to ‘mysql.old’ 3. Open the Add/Remove Programs wizard. Locate MySQL Server 5.0 and click change. Choose to repair it. Go through the steps to complete repair 4. If needed, restart the MySQL501 service 5. Open up Network Recorder. Enter a blank password. It should let you in.           © Copyright Bosch Security Systems All rights reserved. Text, images, graphics, sound, animations and videos as well as the arrangement of the same in Bosch offline knowledgebase (help file) are protected by copyright and other intellectual property rights. The content of these offline knowledgebase may not be copied, disseminated, altered or made accessible to third parties for commercial purposes. Some Bosch web sites may also contain text, images, graphics, sound, animations and videos subject to third party copyrights. Warranty Note This information is provided by Bosch Security Systems ''AS IS'' and without warranty of any kind, expressed or implied, including (but not limited to) any implied warranties of merchantability, fitness for any particular purpose or non-infringement. While the information provided in believed to be accurate, it may include errors or inaccuracies. Bosch Security Systems will not be liable for any damages of any kind arising from use of this tool, including, but not limited to, direct, indirect, incidental, punitive and consequential damages.  

Question How do I repair the database on the Telex Network Recorder?   Answer To repair the database, follow the steps below: 1. Open the database reviewer program and press and hold F9, then press F11, this will enable the repair options under the maintenance menu. 2. Click on "Maintenance" 3. Click on "Repair Database 1" , press OK at the prompt. Note: Time to complete will vary based on database size. 4. Click on "Repair Database 3" , press OK at the prompt. Note: Time to complete will vary based on database size. 5. After "Repair Database 3" is done, reboot the computer. 6. Restart the network recorder, you should now be able to access the Database and NR should be recording files again. NOTE: You should also perform these steps before any software upgrades to Network Recorders .                   © Copyright Bosch Security Systems All rights reserved. Text, images, graphics, sound, animations and videos as well as the arrangement of the same in Bosch offline knowledgebase (help file) are protected by copyright and other intellectual property rights. The content of these offline knowledgebase may not be copied, disseminated, altered or made accessible to third parties for commercial purposes. Some Bosch web sites may also contain text, images, graphics, sound, animations and videos subject to third party copyrights. Warranty Note This information is provided by Bosch Security Systems ''AS IS'' and without warranty of any kind, expressed or implied, including (but not limited to) any implied warranties of merchantability, fitness for any particular purpose or non-infringement. While the information provided in believed to be accurate, it may include errors or inaccuracies. Bosch Security Systems will not be liable for any damages of any kind arising from use of this tool, including, but not limited to, direct, indirect, incidental, punitive and consequential damages.  

Question What does local mode in the IP-223 support?   Answer Local mode in the IP-223 is the most commonly used mode of the five that are available. It connects directly to the radio using a DB-25 connector providing TX and RX audio connections, COR input or VOX for RX packet generation and a PTT output line to the radio.  The audio connections to the radio may be single ended or balanced pair, impedances are selectable as required by the specific model of radio used and set via the IP-223s internal jumper settings.  Binary Coded Decimal code output is available for channel steering on radios equipped with BCD inputs, with seven bit lines are available which can select up to 100 channels.  The BCD digital outputs are custom programmable per function tone. Additionally, some radios can be controlled using serial commands allowing for an increased feature set, currently these are limited to the following: Kenwood TK-x80, -x90, -x150, -x180, -5x10 and NX-700/800 NXDN series EF Johnson 5300 RS and ES series Motorola iDEN Falcon series TETRA Supura   Please see IP-223 the manual for more detailed information.           © Copyright Bosch Security Systems All rights reserved. Text, images, graphics, sound, animations and videos as well as the arrangement of the same in Bosch offline knowledgebase (help file) are protected by copyright and other intellectual property rights. The content of these offline knowledgebase may not be copied, disseminated, altered or made accessible to third parties for commercial purposes. Some Bosch web sites may also contain text, images, graphics, sound, animations and videos subject to third party copyrights. Warranty Note This information is provided by Bosch Security Systems ''AS IS'' and without warranty of any kind, expressed or implied, including (but not limited to) any implied warranties of merchantability, fitness for any particular purpose or non-infringement. While the information provided in believed to be accurate, it may include errors or inaccuracies. Bosch Security Systems will not be liable for any damages of any kind arising from use of this tool, including, but not limited to, direct, indirect, incidental, punitive and consequential damages.  

Question How do I connect to a Vertex Standard VXR-7000 Repeator?   Answer See attached             © Copyright Bosch Security Systems All rights reserved. Text, images, graphics, sound, animations and videos as well as the arrangement of the same in Bosch offline knowledgebase (help file) are protected by copyright and other intellectual property rights. The content of these offline knowledgebase may not be copied, disseminated, altered or made accessible to third parties for commercial purposes. Some Bosch web sites may also contain text, images, graphics, sound, animations and videos subject to third party copyrights. Warranty Note This information is provided by Bosch Security Systems ''AS IS'' and without warranty of any kind, expressed or implied, including (but not limited to) any implied warranties of merchantability, fitness for any particular purpose or non-infringement. While the information provided in believed to be accurate, it may include errors or inaccuracies. Bosch Security Systems will not be liable for any damages of any kind arising from use of this tool, including, but not limited to, direct, indirect, incidental, punitive and consequential damages.  

Question What are possible causes of poor audio in Telex Radio Dispatch Systems?   Answer Telex Radio Dispatch systems have operating requirements which need to be established and verified, in order to insure good quality audio across a system.  Here are some fundamental parameters that installers and technicians need to be aware of, which, if not properly ascertained, may be causes of poor quality audio in the system: Levels are a foundational issue with Telex radio systems. Improper digital audio levels are one of the most common defects that impair system audio quality. This means that the digital transmit audio and digital receive audio must be “proportional.” “Proportional” means that the sampling and conversion of the analog signals must be in the proper binary value “window.”  Generally this would be indicated by a VU Meter bar graph deflection of about 2/3 to ¾ scale at voice peaks. Improper digital audio levels are the result of improper analog levels going into the CODEC. Digital audio that is too low or too high will degrade re-constitution of digital back to analog audio at the end points. The Telex “VU Meter” program allows measurement of the digital audio levels at different points in the network, (see the Knowledge Base articles on Optimal Analog to Digital Conversion in the IP-223, and Telex Dispatch VU Meter Program.) VU Meter gives a graphic and numeric indication of digital sampling with multicast traffic. Microphones The quality of the transmit audio of the entire system depends heavily upon the quality of the signal originating from the microphone.  The microphone is where the “tires touch the road” in the system, and a poor quality microphone cannot be compensated for by any external means. The highest quality radio system will not sound good if the microphone is of poor quality, improperly adjusted, or improperly used.  The microphone is the last component in the system that should be a low price based selection. Poor microphone audio is often caused by improper use of the microphone, or the wrong type of microphone for the application.  Without a doubt, the headset mic is the best choice for any dispatching application, whether pubic safety, or not. The headset mic is always at a consistent distance from the dispatcher’s mouth, and the close proximity minimizes background noise, and promotes a very consistent voice transmit level.  Keep in mind that although some dispatchers do not like to wear headsets, no other type of mic will produce as consistently good sound quality as well as a headset mic. Desktop and gooseneck microphones are designed to be used at a specific distance from the dispatcher’s mouth, and when that distance is exceeded, audio quality degrades, and more background noise is picked up along with the voice.It is common to find a desk mic used at a much greater distance than intended, and this creates less than optimal voice audio quality. Obviously, a microphone gain setting that is too high can also create a similar problem, with excessive pickup of background noise, and excessive voice amplitude. Too low of gain setting, and the voice amplitude will be too soft and accompanied by noise. Again console mic audio in a RoIP system is adjusted by watching the VU Meter deflection at the console, using a loud talk test. Once the best deflection is attained, further gain adjustments at the radio end ensure proper transmitter modulation, and optimal audio quality. Voice peaks are a recommended reference point for calibration. Tones may not be as accurate for modulation calibration, as digital conversion does not reproduce single frequency sine waves as well as voice modulation. Control Stations Control station radios need to be run across the test bench to insure that they meet all performance specifications. Once installed on site, transmit modulation levels need to be re-verified, once the overall system alignment is completed. Mic Jack Audio Some radios use the mic jack as the TX audio interface. Be aware that such low level signals are susceptible to local sources of electrical noise, and shielded cables should always be used. RF Most installations use multiple control stations in a single rack or shelf arrangement. RF leakage can infiltrate wiring of all kinds, so it is important to minimize any radiation that may occur in the vicinity of the system equipment. Keep lead lengths as short as possible. Using outside antennas located as far away from equipment as is possible is important, especially when using high power base stations. Use double shielded RF antenna cables to insure that minimal RF radiation is occurring locally at the rack. iDen phones and similar can generate all kinds of pulse mode interference, especially if the antenna is not cabled to an external location. A loose antenna cable connector can create a lot of RF radiation near the radio. When in doubt, shield everything and make sure connections are tight. Amplified speaker cables and microphone cables are very susceptible to pulse mode RF interference. High Noise Floor Areas For example, if you are planning a power company dispatch center installation, and you have 345,000 volt transmission power lines next to the building, you may have a noise problem. Similarly, areas near commercial radio and television broadcasting towers may also have a very high RF noise floor that must be considered. Control station interfaces should be located out of the area of these types of noise sources if possible. If installation away from these noise sources is not possible, extra care should be used to shield all wiring.  Faraday shielding is the best method of eliminating electrical noise induced from radiating sources. Noise Present via Supplied AC Power Variations and transients in AC power can contribute to system noise. Using UPS power supplies or power conditioners can help eliminate AC power noise present on the supply lines. Verifying that the equipment room supply outlets are properly wired and correctly grounded is good practice. Improper grounds can be a significant factor in noise. Telex equipment should always have case grounds installed. DC Power Telex equipment in racks should have a common DC power supply, rather than each one on a separate power supply. A power supply plugged into an improperly grounded outlet will almost always cause AC noise. Network Network topology can cause VoIP audio problems if there are bandwidth restrictions, or if shared services are causing packet queuing, or data collisions. If operating on a shared network, use VPN Tunnels. Many Telex customers have had good results with products such as DCB (Data Communications for Business) tunnel boxes.           © Copyright Bosch Security Systems All rights reserved. Text, images, graphics, sound, animations and videos as well as the arrangement of the same in Bosch offline knowledgebase (help file) are protected by copyright and other intellectual property rights. The content of these offline knowledgebase may not be copied, disseminated, altered or made accessible to third parties for commercial purposes. Some Bosch web sites may also contain text, images, graphics, sound, animations and videos subject to third party copyrights. Warranty Note This information is provided by Bosch Security Systems ''AS IS'' and without warranty of any kind, expressed or implied, including (but not limited to) any implied warranties of merchantability, fitness for any particular purpose or non-infringement. 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