> On Tue, 1 Feb 2000, Jens David wrote:
> > John Ackermann wrote:
> > > Not all hardware implementations need it, but there are at least some systems
> > > where dropping the PTT immediately results in the tail end of the packet
> > > (including the CRC and closing flag) to be chopped off.
> >
> > In fact per definition the txtail starts after the closing flag has been sent.
> > Usually it�s the modem which causes some delay on the signal. Consider for
> > example the scrambler or the FIR filter on a G3RUH-compatible modem.
> >
> So .. ok .. txtail is important. Couldn't we use some fixed (or computed)
> value which couldn't be mis-configured ?
> (driver/baudrate/anything dependant)
Yes and no. With current available modem designs sure. But not with a future
modem which does for example a convolutional FEC with long interleaver.
-- Jens
