[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[HLL] Sync 14.4-Data



Status: RO
Content-Length: 1528
Lines: 41

-----BEGIN PGP SIGNED MESSAGE-----

Hi,


> > There are different solutions, at least:
> > * Stay with 14.4-modems, try using them in sync-mode
> Pro: we know that it works. The VP1 uses sync and it sounds better than
> many international circuits.
> Con: there is no way (correct me if I am wrong) to create a compatible
> software emulation using a PC with a standard modem.
> My conclusion: sub-optimal given the stated goals of this project.

Big advantage is avaiable technology (gsm-coder, 14.4-modems/lines).
So i'm stuck to on this idea a bit...

Standard hayes-kompatible 14.4-modems have a sync operation mode.
Looks as if they could operate with VP1-sync-standard etc.
The problem is only the pc-comm-port, which can't operate synchron.
There would be not problem with HLB, because we design i/f ourselfs.

So for a compatible implementaion (pc/hlb/vp1) we would need a way
to encode/decode this sync-data on standard com-ports.
No problem with standard i/f-hardware (but probably unwanted),
but would require tricky programming if done in software.
Software-Solution might be ok for DOS, but impossible when
using WIN or LINUX etc., because of timing issues.


Volker

-----BEGIN PGP SIGNATURE-----
Version: 2.6.3i
Charset: latin1

iQCVAgUBNLom6Uiof7Gu0VvJAQHv5AP/Zyx32xOwvfnFsb1SQ3QrtG1scH/AQKEw
vCun5D/B+5DQ3BwbbXJx0jrm5X9MYhKkQNUtvEDJGxN3KkptGbDWHqKic/mnIkf3
0vErp6FMU1rBjssS3ziJxiFd+we1L7iKy9RP/2Gw4/nBMfYKz6J/jRG3mKtU3E+v
WmR4sxXPVWU=
=936c
-----END PGP SIGNATURE-----