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Sébastien Lorquet squalyl at gmail.comHi, You can now be sure: the 3.3v part is the MAX 3232. Other parts exists that need smaller capacitors (100nF) instead of 1-10µF required by the "grand father" MAX232 :) Sebastien On Thu, Mar 18, 2010 at 8:52 AM, Dieter Spaar <spaar at mirider.augusta.de>wrote: > Hello Lubomir, > > On Thu, 18 Mar 2010 01:00:44 +0100, "Lubomir Schmidt" < > gentoo.lubomir at googlemail.com> wrote: > > > > How can i change the cable to get it working? What is a > > level-converter and where can i get such? > > The level of the RS-232 interface is specified to be -3V..-15V for a > logic one and +3V..+15V for a logic zero, typically -12V and +12V is > used. The phone uses 0V and 3.2V. So you need a level-converter between > the RS-232 port of a PC and the phone. > > The simple solution is to use a ready-made data cable with a built-in > level-converter, they cost around 9.00 EUR on ebay Germany including > shipping, either as USB or RS-232 variant. If you really want to build > your own level-converter, you can for example use the MAX232 IC. The > MAX232 is for TTL level (0V and 5V), I think there is a variant for > 3.2V available, however I am not 100% sure. > > Best regards, > Dieter > -- > Dieter Spaar, Germany spaar at mirider.augusta.de > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.osmocom.org/pipermail/baseband-devel/attachments/20100318/3972a33d/attachment.htm>