This is a discussion on cellular modem+irda+ppp: Linux vs. WinXP within the Linux Operating System forums, part of the Unix Operating Systems category; --> Hi, I'm not sure if this is the proper group to ask this question, but I have a problem ...
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| Hi, I'm not sure if this is the proper group to ask this question, but I have a problem with the data transfer rate of the softmodem of my Nokia 6210 cellular. 1) Both, under Linux (SuSE 8.1 on a ThinkPad A31) and WinXP I have the softmodem configured as a standard AT modem. Under Linux I've done this via Yast2->Network/Basic-> Modem configuration. The serial port in both cases is the IR port (dev/ircomm0 under Linux) set to a baud rate of 115200. No special init strings other than 'ATZ' are sent to the modem. No HSCSD, GPRS or other 'high speed' connections are sought for, i.e. a plain 9600 baud connection to the ISP is expected. 2) Both, under Linux and WinXP connecting to the ISP works well. However, downloading several test-files shows, that the data transfer rate in the Linux case is >>> a factor of 6-8 *slower* <<< than under WinXP ?!? What is going wrong here ? Anyone had this experience before ? Is there any way to fix this / any diagnostic strategy to find the bottleneck / any special ppp option to speed up things ...? Any help would be most appreciated. Wolfram PS: In the 'Datarate Monitor' of the 'KInternet' Tool I have realized, that the B/s-rx graph on transfer through the cellular modem consists of equidistant very short, sharp spikes with rather long 'empty' periods. This looks very different from that graph for other modems. (maybe this is a clue?) |
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| hi everyone, i need help configuring my motorola mobile phone on linux ,(it's a gprs phone that i use to get connected to the net) in win xp it comes with a setup file, but in linux i can't figure how to install it, i use a serial port to connect it to the pc. thank you |