Old central, flash key

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Hi,

On Wed, May 19, 1999 at 09:21:24PM +0200, Marc SCHAEFER wrote:
> Asking that here too, maybe someone has a hint :)
> 
> We have here a quite old central (analogic). One (the only) feature
> is that if you hit the FLASH key on the telephone, you can either
> transfer the call, or dial a second number while holding the other.
> 
> Now, it doesn't look like the flash key is a DTMF, it's pulse dialing
> (as everything else).

Flash is a very brief short cut of the two wires, like a pulse dialed "1",
but longer (somewhat about 100 or 200 ms, if I remember correctly).

> My goal: enable a modem to send this flash key.

A few modems can do "ATD!" (exclamation mark), but not all of them.

[..]
> I know that usually, the flash key is ATDP!. However, that doesn't work.
> Even when disabling DIAL TONE detection (ATX0).

What does happen after ATD! ?  How does it "sound like"?

gert
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Gert Doering - Munich, Germany                             gert@greenie.muc.de
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