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Thread: [RESOLVED] Modem, <DLE> Data-Link Encapsulation

  1. Feb 6th, 2006, 07:12 PM #1
    CVMichael
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    Resolved [RESOLVED] Modem, <DLE> Data-Link Encapsulation

    I'm programming in VB6, I'm trying to make an ansering machine.

    I have a modem that keeps giving me problems:
    AOpen FM56-PX 56K V.92 PCI Modem


    It supports Caller ID, and Voice.

    After I installed it, Caller ID would not work, and it would not even detect the phone ring... Voice worked fine, and <DLE> worked fine.

    FYI: <DLE> (Data-Link Encapsulation, or Data Link Escape) is a byte delimiter (ASCII 16) that the modem returns in Voice mode telling me a special message (detection of dial tone, detection of phone numbers, basically all phone sounds). I used to get "<DLE>1<DLE>~" characters when you press #1 on the phone for example.

    So, Caller ID did not work, and it would not report "RING" when I was getting a phone call.
    I got upset, I bought a new modem US Robotics, but unfortunatelly it did not had voice (the seller people told me it had voice), so I returned it.

    I put back the old AOpen modem... and all of a sudden Caller ID works !!
    It detects Caller ID ! ... cool... guess what.... now I don't get <DLE> reporting !

    Arggg stupid modem !!!

    So, anyone knows maybe there is a setting to enable <DLE> reporting ?
    Anyone had this problem ?
    how to fix it ??

    I'm trying to get this modem to work (perfectly) for like 3-4 weeks now....
    Last edited by CVMichael; Feb 6th, 2006 at 07:16 PM.
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  2. Feb 6th, 2006, 07:45 PM #2
    gigemboy
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    Re: Modem, <DLE> Data-Link Encapsulation

    http://vip.aopen.com.tw/forum/viewme...essageID=77292

    http://vip.aopen.com.tw/forum/viewme...essageID=47449

    Thats about all I could find about it, and it won't be much help. Read a few places where people have been having trouble with it on XP systems, but nothing too specific to this, just dialing up to a remote ISP...

    P.S. I hate working with modems... hard to find good documentation for them...
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  3. Feb 6th, 2006, 11:57 PM #3
    CVMichael
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    Re: Modem, <DLE> Data-Link Encapsulation

    I got it to work

    Before for some reason I always got the <DLE> at the beginning of the buffer, and I made my program check if the first character is the <DLE>.

    Now, it's mixed with everything else, so I have to do an InStr to search if there is a <DLE> character in the data.

    Took me a while to figure it out...
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