This is merely a historical archive of years 2008-2021, before the migration to mailman3.
A maintained and still updated list archive can be found at https://lists.osmocom.org/hyperkitty/list/baseband-devel@lists.osmocom.org/.
Arne zachso at arcor.dethe 3v3 version of max232 is max3232, but this isnt what he needs. RM, you need a usb->RS232 only if you have no RS232 at one of you computers/notebooks available. if you have a normal RS232-port you have already everything you need and can use you cable bye arne On Sun, 12 Jun 2011 20:53:49 +0200 Sébastien Lorquet <squalyl at gmail.com> wrote: > If you want to use a basic serial port, use a 3.3V version of the > good ol' MAX232 (maybe MAX202? can't remember) > > Sebastien > > On Sun, Jun 12, 2011 at 8:20 PM, Alexander Huemer > <alexander.huemer at xx.vu>wrote: > > > On Sun, Jun 12, 2011 at 11:11:37PM +0530, R M wrote: > > > Why do I need a USB/RS232 cable ? > > > > > > If its a laptop, I can understand that they don't come with a > > > serial port > > so > > > you need the converter. > > > > > > Many PCs come with a serial port. > > > > > > Can I not connect the serial version of the T191 unlock cable to > > > PC > > serial > > > port? > > You could, but the RS232 ports that are often present on ATX-style > > mainboards provide 12V, which is too much for the phone. > > > > > > As far as I understand, the T191 unlock cable is used to convert > > > RS232 signal level to 3.3V required by C128. > > no. A serial T191 cable does nothing by itself. > > > > > > Since I was able to get hold of a serial version of T191 unlock > > > cable as > > I > > > told you in the begining of the mail, I also purchased a USB to > > > Serial converter. Its a BAFO BF-810. > > > Its based on Prolific chipset. > > Unfortunately the prolific chips seem to not work as well for this > > purpose as the FTDI chips. > > > > > > So I connected first the USB/RS232 converter ju(BAFO BF-810) and > > > then > > the > > > serial version of the T191 unlock cable. > > > > > > Is this the right way ? > > > OR > > > Can I just connect the USB/R232 converter (based on Prolific > > > chipset) and the use a cable which contains DB9 female on one > > > side and 2.5mm jack on > > the > > > other? > > I don't get the difference between those two ways. > > > > > > I am asking the second question because you have mentioned in the > > > wiki > > under > > > Hints and Warnings like this: > > > > > > If you don't use a 3.3V (low voltage TTL, LVCMOS) serial port you > > > can fry your phone! (internally, it connects to the IO-pins of > > > the baseband processor which run at 2.8V). *Don't connect > > > directly to your PCs serial port (running at +/- 12V!).* > > This warning wants to tell you that you should use a USB<-->RS232 > > converter and not use an onboard port of a PC. > > > > Kind regards > > -Alex > > > >