Copyright (C) 1999 by Telia Research AB, Lulea, Sweden;
                                                     Lulea 1999-06-22



              Welcome to the FSAN xDSL simulation tool!

This the first public release of this tool. Please look in
doc/Simulation_Tool.html for general documentation.

The FSAN simulation tool aims to support the evolving standardization
process of VDSL. The objective of the simulation tool is to
concentrate the FSAN results into one simulation package to facilitate
evaluation of VDSL proposals and scenarios.

A number of scenarios (specific topologies and traffic patterns) are
implemented and the FSAN noise models are directly available in this
tool.  Four of the suggested power back-off methods are also
implemented. The performance of VDSL as well as its impact on existing
services (in particular ADSL, which is FEXT limited) can be
evaluated. Besides the predefined FSAN scenarios and models it is
possible for the user to define their own scenarios, noise models,
various noise levels, and spectral masks. The tool does not simulate
any particular line-code, still, vendors may suggest numbers on
efficiency loss corresponding to, e.g., cyclic extension (DMT) or
excess bandwidth (SCM) which then can be taken into account by the
tool.

License:
-------
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or any
later version.

When REFERRING to this simulator (FSAN xDSL simulator) no modification
of any matlab code besides userDefinitions and Main routines shall be
done. That is, no routines in the xdslcomm directory should be
changed. When referring to simulations done with this simulator the
userDefinitions and Main files must be made available upon request to
anyone asking for them. That is, anyone should be able replicate any
simulations referring to this simulator by putting the userDefinitions
and Main files into their simulator and redo the experiments for
them-self.


Disclaimer:
-----------
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
General Public License for more details (in file COPYING, or
http://www.opensource.org/gpl-license.html)

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA

The numerical assumptions in this tool are based on assumptions in published
ETSI and ANSI standards, and the few measurements that have been performed.
Due to the random and large variations in behavior of these networks, it
can not be guaranteed that these assumptions are realistic for real access
networks.

Contact:
--------
Telia will serve as support for the tool and will release bug-fixes and
minor revisions of the tool as FSAN and Telia finds it appropriate.
However, major updates/revisions of the tool can not be guaranteed.

Comments can be sent to:
fsansimulator@lulea.trab.se

Happy simulation, wishes the main authors:
Tomas Nordstrom (Tomas.B.Nordstrom@Telia.se)
Daniel Bengtsson (Daniel.J.Bengtsson@Telia.se)

Telia Research AB
Aurorum 6
S-97775 Luleå
Sweden