On Wed, 12 Jul 2000 around 00:16:34 +0200, Henner Eisen wrote:
> >>>>> "Michael" == Michael Mess <michael@michaelmess.de> writes:
>
> Michael> There should be an ioctl for hook up. After using it you
> Michael> "hear" the dialtone with read() from the device or giving
> Michael> keypad commands by sending audio data of DTMF-tones with
> Michael> write() to the device.
>
> The current isdn LL-HL interface does not provide for accessing
> b-channel data while no isdn connection is established. Thus, it won't
> be possible to implement such a driver on top of the current LL-HL driver
> interface. You would either need to extend the LL-HL-interface and modify
> all HL drivers accordingly or to bypass the LL-HL-interface and hook directly
> in a HL-driver of choice (i.e. HiSax).
Nobody said the data should come from the LL-HL layer, it can come
from the isdn-tty driver itself when it detects read access on an
disconnect/not-yet-connected line. Only when the line is in connected
state the reads will pass data from the LL-HL layers.
I however won't like to see this, it all sounds suspusiously to userland
solutions. The ioctls command/status operations are neat, polling for AT
stuff is a capital offence :)
If I make another suggestion, what about a nice ioctl for access to the
control bus on ISDN?
Met vriendelijke groet,
Pauline Middelink
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