The ATM Traffic and Network (ATM-TN) Simulator

ATM-TN is an ATM network and traffic simulator implemented in C++. ATM-TN runs on top of the SimKit simulation kernel. Different network and traffic configurations can be specified for simulation via ATM-TN's network file format.

The following links will take you through the registration process to get the ATM-TN source code (including examples and some documentation):

ATM-TN 2.12
A new version that uses configure for simplified builds, however it does not contain the test-suite (as of yet).
ATM-TN 2.0
A slightly dated version, but contains a complete test suite.
ATM-TN 1.7 Windows
A binary of a quite dated version of ATM-TN that should run on Windows machines.