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*nix Thread, Asus EEE PC and HSDPA modem in Technical; Hello all, firstly sorry for not being around much recently, not been too well (that is if anyone noticed I ...
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    maniac's Avatar
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    Question Asus EEE PC and HSDPA modem

    Hello all,

    firstly sorry for not being around much recently, not been too well (that is if anyone noticed I was missing in the first place?)

    Wasn't sure what forum to post this in really, it's a mix between hardware and software, so I decided on the hardware forum. Also apologies for length of this post. . . .

    Anyhow, I've got my hands on an Asus EEE PC for testing purposes at the moment, and I'm trying to get it to work with a 3G HSDPA modem for broadband access. The modem in question is the huawei E220 which is natively suported by the EEE. All well and good so far.

    The problem comes when I try and connect to the 3G network using the modem. Everything is fine up to a point, the modem is talking to the PC properly, dials up and connects, but then right at the last second the connection is dropped with an error;

    The following is the entire log from the modem when it tries to connect.

    Code:
    ATV1
    OK
    AT+CGDCONT=1,"IP","three.co.uk"
    OK
    ATDT*99#
    CONNECT
    Serial connection established.
    using channel 10
    Using interface ppp0
    Connect: ppp0 <--> /dev/ttyUSB0
    sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0x4a2c4172> <pcomp> <accomp>]
    rcvd [LCP ConfReq id=0x0 <asyncmap 0x0> <auth chap MD5> <magic 0xc8ca1c> <pcomp> <accomp>]
    sent [LCP ConfAck id=0x0 <asyncmap 0x0> <auth chap MD5> <magic 0xc8ca1c> <pcomp> <accomp>]
    rcvd [LCP ConfAck id=0x1 <asyncmap 0x0> <magic 0x4a2c4172> <pcomp> <accomp>]
    sent [LCP EchoReq id=0x0 magic=0x4a2c4172]
    rcvd [LCP DiscReq id=0x1 magic=0xc8ca1c]
    rcvd [CHAP Challenge id=0x1 <de792e6a48144311d28be84a68ae33e9>, name = "UMTS_CHAP_SRVR"]
    sent [CHAP Response id=0x1 <ff06415b193358ca3f66a3bfaa0ee2eb>, name = "guest"]
    rcvd [LCP EchoRep id=0x0 magic=0xc8ca1c 4a 2c 41 72]
    rcvd [CHAP Success id=0x1 ""]
    CHAP authentication succeeded
    CHAP authentication succeeded
    sent [CCP ConfReq id=0x1 <deflate 15> <deflate(old#) 15> <bsd v1 15>]
    sent [IPCP ConfReq id=0x1 <compress VJ 0f 01> <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns3 0.0.0.0>]
    rcvd [LCP ProtRej id=0x2 80 fd 01 01 00 0f 1a 04 78 00 18 04 78 00 15 03 2f]
    Protocol-Reject for 'Compression Control Protocol' (0x80fd) received
    Modem hangup
    Connection terminated.
    The problem deepens. As it's something to do with compression I thought I'd try switching off the compression used. To do this I worked out I needed to edit the modem initialisation string in the hardware properties, which is fine compression is turned on, &C1 which I was going to change to &C0 to turn it off. Problem is when I goto apply the changes, the machine gives me two errors saying the driver and country aren't slected and exits without saving the changes. Other problem is there is no driver or countries available to select from the relevant drop down boxes!

    I'm stumped, can anyone help me get this to work??

    Cheers,

    Mike.

    (Moved to *nix since it seems more relevant)
    Last edited by Ric_; 25th January 2008 at 01:19 PM. Reason: Thread moved different forum

  2. #2

    Geoff's Avatar
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    You requested a PPP compression system the server hates and it threw you off.

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    maniac's Avatar
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    Any ideas how I can change this? This was the default settings on the machine when I plugged it in, and there's no where obvious to change it apart from editing the modem initialization string, which I can't do for some reason, as explained above.

    Mike.

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    Geoff's Avatar
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    It's not a modem problem, it's an issue with your ppp stack. PPP configuration usually lives in /etc/ppp on linux.

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