Critical Communications: Dispatch

Question How do I deal with IP-223 "False Transmit Keying" in 2 Wire Console Mode?   Answer IP-223s in Console mode, when used with a 2 wire configuration, are known to be suseptible to decoder falsing (the decoder thinks it is receiving a Transmit tone burst) when receiving high level receive signals.  This makes the IP-223 momentarily shift from Receive Mode to Transmit Mode.  The short burst of transmit audio not only causes noise on the channel, but often causes the transmitter to actually change channels, which results in dispatch traffic accidently being broadcast on incorrect channels. Two wire mode is susceptible to this because the transmit and receive audio are on the same pair of wires, and so the decoder is exposed to the receive traffic as well as transmit traffic from the console.  Voice frequencies of approximately 1950 Hz and above, with signal levels approaching 0.0 dB peaks at the input of the IP-223, can trigger this phenomenon. Resolution Changing the configuration of both ends of the circuit to 4 wire will eliminate the problem.  When 4 wire conversion is not available, a reduction of receive audio level into the radio end IP-223 should minimize, if not eliminate the problem.          © 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 an IP-223 for BCD Channel Control?   Answer Many radios are capable of being channel steered via external BCD (Binary Coded Decimal) control. The IP-223 is capable of generating BCD channel control via the bit lines at the DB-25 connectors. The BCD outputs are controlled by the F-Tones generated from the console, and are specified in the F-Tone tables, in the Per Line Settings of the IP-223. BCD bit lines are assigned to the DB-25 pin numbers as follows: 8 -   Dig 0 21-  Dig 1 9 -   Dig 2 22 – Dig 3 10 – Dig 4 23 – Dig 5 20 – Dig 6 The range for the digital output number is 0 to 128, as shown in Table 16, on page 161 of the IP-223 manual. Using pin 20 for COR limits the range to 0 to 63. Assignment of the BCD output values are accomplished in the Per Line Settings page of the IP-223, shown in Figure 1 below. Enter the desired numeric values for each F-Tone in the Digital Output column, (some applications may require the entry of the compliment of the channel number.)  Set IP-223 jumper J8(Line 1) and J30(Line 2) for the appropriate pull up voltage (+5, +12, or floating.) To verify operation of the BCD control, measure the voltage on the LSB bit line, D0, and watch for state changes as the F-Tone number is changed.   Figure 1 - Function Tone Set Up in Per Line Parameters           © 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. 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 troubleshoot audio noise with High Powered Control Stations?   Answer When using a high power transmitter connected to the IP-223, such as a 100 watt base station, electrical noise can be a problem when the station un-keys.  What can be done to diagnose and resolve the problem? Provide the IP-223(s) with a power supply that is electrically isolated from the transmitter. Properly ground the IP-223 Keep power leads away from audio lines Use double shielded coaxial cables Be sure the antenna is as far from the equipment rack as possible Make sure the power leads to the transmitter are of sufficient size for the current draw         © 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 change Zones/Channels on a Kenwood radio with Telex Dispatch products?   Answer The Telex Consoles do not have the ability to directly change zones on a radio, this would be done in either the IP-223 or IP-224. The frequency you select on the console would correspond to the F-Tone on the Per Line Setup page in the IP-223/4. In that same section look at the far right hand side and you will see two columns labeled System and Channel. The System column is the zone that you want the radio to change to when the console selects that channel. In turn the IP-223/4 will also change to that channel in that zone. So in practice let’s say the IP-223/4 has F1, F2, F3 set to zones 1,2,and 3 for the channels 1,2,3 respectfully: Now if this is submitted and saved to eeprom, the IP-223/4 will now change channels to zone 1 channel 1 when the IP-2002 selects F1. If the console selects F2 then the radio will change to zone 2 channel 2. If the console selects F3 then the radio will change to zone 3 channel 3.         © 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 How do you modify the IP-223/MTRBi cable assembly to work with the IP-224?   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 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 What are some of the reasons for no serial control of radios attached to IP-223?    Answer Serial control of some Kenwood, EF Johnson, Sepura and iDEN radio models require data initialization upon boot up of the IP-223 before the data connection becomes active. This is indicated by a message in the display of the IP-223, such as “KENWOOD” for Kenwood radios and “EFJOHNSON” for EF Johnson radios (The radio must be powered up before the IP-223 is power cycled.) If you do not get this confirmation upon boot up, you will need to do some troubleshooting. This indication will persist in the IP-223 display until the first time the radio is keyed up. If you are not getting any indication of serial data initialization, check to see that the serial cabling is correct and that the serial programming jumper is inthe correct position for the radio installed. If you are using Line 2 of the IP-223, be aware that a Serial Y cable is required to adapt the standard Telex radio to IP-223 interface cable for use with Line 2. Check to see that you have selected the correct serial data mode in the IP-223 Per Line Settings page, for the radio model you are using.               © 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 some reasons I get intermittent PTTs in Tone Mode with Analog Consoles and IP-223‘s?   Answer When using a legacy console with RoIP transport, under certain conditions PTT activation at the radio end (Tone Mode IP-223) may not be consistent. There are two main reasons this can occur: Signal level into the tone remote panel or tone controlled radio is too high or too low. Both insufficient signal level, or excessive signal level can cause the decoder to become unreliable. Increasing or decreasing the level into the decoding device may reveal the optimum set point. Ideally, the set point should be centered in the decoding signal “window”. This point may vary from one decoder device to another. Doubling of the LLGT. If the Console Mode IP-223 does not have the PTT Notch filter on, a 2175 Hz sine wave is sent out with the console audio. At the radio end the Tone mode IP-223, a second LLGT tone is added. The constant variation in phase of these two beating signals will cause problems with intermittent decoding. Only the Tone mode IP-223 should be generating the LLGT. Be sure the Console mode IP-223 has the PTT Notch ON.               © 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 isn't my Kenwood TK-x90 changing channels after following the Telex Instructions?   Answer Changes by Kenwood have caused an issue with firmware for the TK-x90 radio. We know that firmware check sum 7C4A will not work with our IP-223 or IP-224. You will need to downgrade your radio to Firmware Check sum 3902. This will allow you to change channels and have control of the TK-x90 radio from our IP-223 and IP-224 products.           © 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 Addressing and Port numbers are in use by Dispatch products? What is the Multicast address range for Telex IP Dispatch products?   Answer The products support both Unicast and Multicast addressing. Class A, B and C private addresses are supported Class D Multicast is in an address range starting at 224.0.0.0 and goes to 239.255.255.255 Acceptable Ports range from 1054 to 65535 for each address. Some IP Addresses and Port numbers are currently in use by our products and should be avoided,  TSM - Telex System Manager (used system wide): 233.15.18.22 Ports 7635/7636 Network Recorder and Remote Database Reviewer: Static IP address of Network Recorder, port # 12343 - by default - can be changed. My SQL Server port 3306 IP-223: 4235 - Telex devices connect to this port for  generating tones.  Specifically 5/6 tones and some DTMF tones. 4245 - Telex devices connect to this port for phone mode control, Remote Cross Patching, Scan List updates, and Cloning.           © 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 iDEN Radio Control on Legacy Tone Systems using IP-223s?   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 do I configure the IP-223 to operate in Console mode?   Answer Programming the IP-223 to operate in Console mode: For either 2 or 4 wire set J3, J9, J11, J16 and J21 (Line 1) or J19, J20, J25, J28 and J29 (Line 2) to "B" position. For 2-Wire; set J33 and J34 (Line 1) or J5 and J6 (Line 2) to "A" position, set J14 (Line 1) or J24 (Line 2) to "B" position. For 4-Wire set J33 and J34 (Line 1) or J5 and J6 (Line 2) to "B" position, set J14 (Line 1) or J24 (Line 2) to "A" position. Close unit   Now connect your 2 or 4-Wire control line to the correct IP-223 DB-25 I/O port. For 2-Wire connect the (TX/RX) wires to Pins 13 and 25 For 4-Wire connect the TX (Out to console) wires to Pins 13 and 25, connect the RX (In from console) wires to Pins 12 and 24. Once your jumpers and wire connections are set you will need to place the IP-223 line into Console mode. To do this, follow the steps below: Log into the web page of the IP-223. Click on the Multicast address setup picture at the top of the page. Use the Line Type drop down for line 1 or line 2 and set it to Console mode. Now Click on the Submit button at the bottom of the page. Click on the Per-Line setup picture at the top of the page. Go to individual Lines being configured for Console mode, scroll down to "Options" section. Check "Parallel Tone Console" checkbox. Now Click on the Submit button at the bottom of the page. Now click on the Save To EEPROM and click on Save Parameters. Now that line of the IP-223 is set to Console mode will decode PTT tones. The next steps you need to take is to set levels. To set levels do the following: Using a transmission test set or similar device, measure the audio on the front panel RX test point of the IP-223 to ground. Key up the attached tone console, with no voice (only 2175 tone present) Using a small screw driver, adjust the RX pot on the front of the IP-223 for the line under test.  Set the Low Level guard tone to the level you desire, typical is -20dbm into a loaded circuit (looking for 0 gain) Key up the tone console, measure the voice audio on the RX pins of the IP-223, typical is 0dbm peaks into a loaded circuit. You should see "CTX F1" displayed on the front of the IP-223 when you PTT from the tone console, TX packets are now being sent to the network.           © 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.