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Frequently Asked Questions
IPR100 VoIP Adaptor for Land Mobile Radio
General Topics
Question: How to connect a radio to the 619 series of audio bridges?
Answer: Omnitronics are in the process of developing a web page that will contain a list of common radios that will connect to a 619 bridge port.
If you have a query about connecting your radio to a 619 bridge port before the list is available, or when the list is completed and if your radio does not appear in it, please forward details of the radio interface to the sales team at Omnitronics and we shall get back to you as soon as possible with a workable solution.
Question: What is the maximum distance that can exist between a 960 handset or 960 console and a base radio?
Answer: If the radio is local to the operator’s position this will depend on the quality of the cable used to make the connection. Omnitronics will (if high quality cable is used) guarantee a nominal figure of 100m from the radio to the 960 handset or 960 console, using an Omnitronics 935 Local Radio Interface module.See the 935LRI brochure and applications document.
However, this distance may be extended with line loss, cable capacitance and the presence of external electrical interference being the limiting criteria.
If it is required that the radio should be remote from the handset or console then connection via a leased line or a copper pair is the answer. The Omnitronics 920FR Remote Control Interface or the 925FR Line Keying Interface may be used here. Once again the limiting factor will be line loss. These products have enabled communication links of up to 15Km distance between a handset or console and a remote radio, to be installed successfully. See the 920FR snd 925FR brochure and applications document.
Question: What is the deciding factor for choosing between DC keying or tone keying for handset or console control of a remote radio installation?
Answer: DC keying can only be used when the connection between the handset and the radio has DC continuity. This is a cheaper option than tone keying and performs the same function. See the 920D/NA and 925D/NA brochure. If the interfaces are to be connected via a Telstra leased line, DC keying cannot be used in Australia. In such cases tone keying is the only simple solution.
Many overseas countries however do not require the same level of approval that is required for installations in Australia. It is advisable therefore to check with a local Omnitronics dealer for the approvals obligatory in the country in which the installation is to take place.
Question: What is the most cost effective solution when there are three radio channels to be controlled from a single handset?
Answer: A 960PM Multi Channel Plinth or a 960C3 Multi Channel Controller (for console applications) will provide a simple interface for the control of three radio channels. See the 960P Range of Handset Plinths brochure and the 960C3 Channel Controller brochure. This simple solution provides the added feature of allowing an operator to simultaneously broadcast and listen on all channels at the same time, permitting the operator to respond quickly to all users and on any channel. Operation time is therefore used far more efficiently thus reducing frustration on the part of the operator and of the user when communicating via a handset or console and remote radios.
IPR100 VoIP Adaptor for Land Mobile Radio
Question: I cannot get my web browser to access the IPR100’s configuration menus and the ‘Eth Link’ LED on the front of the IPR100 will not illuminate.
Answer: You have an incorrectly wired Ethernet cable. If you are attempting to connect directly to your PC without an Ethernet switch you need to use a crossover cable. It is recommended that you use an Ethernet switch. Most modern Ethernet switches automatically detect the line condition and will work successfully with crossover and straight through cables.
Question: I cannot get my web browser to access the IPR100’s configuration menus but the ‘Eth Link’ LED on the front of the IPR100 is illuminated.
Answer: The IP address of your computer and that of the IPR100 are not on the same Internet sub-net. To fix this problem follow the procedure outlined in the IPR100 quick start guide in the IPR100 handbook.
Question: I can communicate successfully with the IPR100 web interface, but when talking I cannot hear audio from the other IPR100 and the VoIP link LED is not illuminated.
Answer: There is a problem with either the VoIP or Network parameters, therefore you will be unable to communicate with the remote IPR100. The VoIP link should be established 5 to 10 seconds after being connected to the network link. This LED (VoIP) will illuminate even if there is no audio information being sent.
To determine the source of the problem, try the following:
Verify that the network and VoIP parameters are correct. If possible, check these settings with your IT support department.
‘Ping’ both the local and remote IPR100 units. If it is not possible to ‘ping’ the units then there must be a problem with the IP configuration of the units, or of the network.
Access and view the configuration web interface of the remote IPR100. This will confirm that the remote unit is configured correctly and the network parameters are correct.
Question: The IPR100 continually restarts. What is the reason for this and what can I do to correct the problem?
Answer: If the IPR100 continually restarts then the problem most probably lies with the configuration. A possible solution may be found by resetting the IPR100 to the default settings set at the factory. See ‘How to Reset the IPR100 to Factory Default Settings in the IPR100 handbook. If this fails to remedy the situation contact Omnitronics for a solution.
Question: The IPR100s are communicating successfully and I can receive audio but my radio will not ‘key up’ to transmit.
Answer: Check that the following parameters are correctly set:
On the Radio/Handset page, check that the ‘device type’ is set to match the port you are using.
If you are using the rear 8-pin E&M port, the device type should be Radio.
If you are using the front 6-pin console port, the device type should be Handset/Console
If you are using the rear port, check that the link settings on the back port are correct
At the remote IPR100, and on the Radio/Handset page, check that the ‘Remote PTT/Busy Control Mode’ is set to ‘Local-Mute/PTT’.
Question: I have a console connected to the front port of the IPR100 and I can hear audio but the ‘Busy’ LED on the console does illuminate when the remote IPR100 is active.
Answer: Check the hardware version of your IPR100 by going to the ‘System Status’ display on the web configuration interface. If the IPR100 hardware revision is previous to revision 1.2 then the hardware does not support this function. If the hardware revision is not displayed then the firmware does not support this function either.
If the hardware revision is 1.3 or later then the hardware does support the ‘Busy’ output, therefore refer to the answer to the previous question.
Question: I am using the ‘Serial Data Pass-through’ mode and I can no longer access the IPR100 serial monitor, why is this?
Answer: The serial monitor mode is disabled in ‘Serial Data Pass-through’ mode so that the monitor output does not interfere with any serial data that the unit is sending.
Question: I am using the ‘Serial Data Pass-through’ mode and I have made an error while changing the IPR100 configuration, with the result that I can no longer access the web interface. How can I get access to the serial monitor to determine the current configuration or to reset the IPR100 to the factory defaults?
Answer: There is a special ‘back door’ entry that will allow access to the serial monitor even though the unit is in ‘Serial Data Pass-through’ mode. Follow the procedure set out below:
Turn off the IPR100
Set up a serial cable together with a serial terminal program (see page 50).
While using the serial terminal program, press and hold the <CONTROL> and <C> keys at the same time.
Turn on the IPR100 while still holding down the <CONTROL> and <C> keys.
You should now be able to see the IPR100 start-up messages and have access to the serial monitor functions of the IPR100.