At 10:16 13/10/99 -0700, you wrote:
>Having worked with PCTEL using a soft modem for 56K baud for handhelds, I
>noticed that it took like 40-60 seconds for the line condition to be
>characterized (echo cancellation and phase shift) before any data could be
>transmitted. So think about this, can the transmission techniques in the
>software for AX.25 (or other format) support half-duplex with a 50 second
>turnaround? Well at least at 1200 baud the turn around time (sync up to
>the sound) is in the few hundred millisecond range.
>
No, but maybe the line only needs to be characterised once, or generically
for each rig.
