The sources to the Technicolor TC72XX cable modem very frequently used in Europe in Ireland, Germany and Czech Republic e.g. have been published on Github. Here is the story:
Because the bridging capability on my Technicolor TC7200 was awful, I was interested, what I could do to fix this for me. The advice in various forums was mostly trial and error kind of stuff. But I also noticed, that Technicolor and UPC CZ are probably not in compliance with the GPLv2.
After about half a year of back and forth with those companies, I convinced Technicolor to comply with GPL an embrace the open source more, or at least make a code drop. Technicolor TC7200, TC7210, TC7230 should have their codebase open sourced and available on Github (including firmware):
As you will notice, there is no licence notice in the root directory, but this should apply: and click on the "TC7200, TC7200.U, TC7210 and TC7230" tab. There are further notices in the files. Some do seem to be proprietary, so please double check.
As for the TC7200, the problem with a missing firmware seems to have been fixed and the specific BCM3383 firmware can be found after a short, high level inspection. This could also mean, the BCM33843 chip has a publicly available firmware now, since that chip is pin and software compatible with BCM3383. But that would need to be verified.
One has to note, that the product is probably still infringing on GPLv2, since there is no source code offer or licence with the product and the source code was made available under questionable conditions this week. Even if this was corrected, that doesn't reinstitute the rights to redistribute to the company. For more information, see the recent court case reported at Opensource.com.
There exists an email address, which seems to generate some answers from Technicolor. That email was given to me by my ISP. If you are interested in contacting Technicolor about open source, don`t hesitate and ask me or your ISP for the email privately.
EDIT: In response to the news article by Phoronix.com, there seems to be a directory containing further Technicolor less public documents, source code archives etc. I probably don't have to mention, you can download all those copious volumes of data with a simple command 'wget -v -m --restrict-file-names=nocontrol -o download.log http://ebroot.technicolor.com/opensw/documents/'. If there are legal implications, I cannot be held accountable by any party for merely mentioning a possibility to copy content and pointing to a publicly accessible website.