![]() ![]() In the box ‘Version Selection’ now the higher firmware version is selected (R020003357). A similar window as in the downgrade procedure becomes visible. Via the CPS menu ‘Tools’ the item ‘Upgrade Phone’ starts the upgrade process. To do so the radio has to be connected to the programmer and put into programming mode. But it looks more tidy to return to the firmware version we’ve started with. For amateur radio needs this will probably have no consequences. Except it now has a lower firmware version. Generally the MTM700 is now ready for use in the amateur radio band. After booting the radio the new (amateur radio) talkgroups can be used. After uploading the codeplug the radio can be switched off using the CPS and the programming cable should be disconnected. Before uploading the codeplug the radio has to be switched off again, the programming cable needs to be connected and with by firmly pushing the power button the radio has to be kicked into programming mode again. In fact the firmware version still aren’t equal, but the codeplug for version 3317 has the same version / structure than the codeplug for firmware version 3340. It will boot normaly and during the boot sequence the new firmware version will be shown at the radio’s display: R020003340.Īfter the downgrade the codeplug for firmware version R020003317 can be uploaded to the radio. Now remove the programming lead and switch on the radio. Finally a dialog shows up to confirm the serial port is available and a radio is connected. This can take a couple of minutes while nothing happens at the screen. The CPS then starts communicating with the radio the figure out if a downgrade is possible. ![]() Next step is to select the item ‘Downgrade Phone’ in the ‘Tools’ menu of the CPS. Nothing (visible) will happen, but a jumper wire in the programmer and pushing the power button will enable the programming mode of the radio. Then press the power-button of the radio for a few seconds. First launch the CPS and connect the radio to the programmer. When starting the radio has to be off but connected to the power supply. In this case these files had to be in the folder: This starts by ensuring the firmware files are in the subfolder ‘sw’ in the Motorola directory. So first the radio had to get a downgrade from firmware 3357 to 3340. It was a long shot, but bottom line was that this was the only option. But I had a file with R020003340 firmware, not an exact match but there was a chance that versions 33 shared the same codeplug version. It was just a tiny problem that this firmware version could not be found anywhere. After that downgrade I could then upload the corresponding codeplug. The next best option was to downgrade the radio to firmware version R020003317. But in my case this function didn’t work at all. The easiest was a function in the lab CPS which translates a codeplug file to make it suitable for a newer firmware version. And in this setup it was not possible to upload a ‘version 3317 codeplug’ to a ‘version 3357 radio’. Unfortunately the radio contained a newer version: R020003357. – 3317: this is the actual firmware version number – 000: this is ‘clear’ firmware, so without TEA encryption In this specific case the codeplug was suitable for radio firmware R020003317: Different firmware versions can share the same codeplug version / structure, but not necessarily. As different firmware versions can contain different functions, not only the firmware has a version number but also the codeplug itself. But then a nasty issue popped up: the codeplug was for a MTM700, but for a lower / older firmware version of the radio. The workaround is to get a codeplug which is already out of band, edit it and upload it to the radio.Īnother radio amateur was kind enough to send me a codeplug for the MTM700. Nevertheless it’s quite hard to bring those old radios out of band. So I was able to quickly read one of the radios. And it seemed I also had the sofware for the MTM700. To do so I could use my home made programmer. A fellow ham had asked me whether I could program a couple of Motorola MTM700 tetra radios for him. ![]()
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