A while back there were some questions about a simulator for a phone network. There is one
on eBay:
5850959638
HTH,
Gil
(offline)
A. G. (Gil) Carrick, Director
The Museum at CSE
University of Texas at Arlington
Department of Computer Science & Engineering
Box 19015, 471 S Cooper Street
Arlington, TX 76019
817-272-3620
http://www.cse.uta.edu/TheMuseum at CSE/