How can we efficiently simulate large neural networks? This paper proposes an object-oriented model for simulating large neural networks using the OMT technique. The server, called NeuSim-NNLIB, is a "beowulf" cluster getting up to 18 MCPS with a cluster of 6 Pentium processors. The modeling has been implemented on a client-server parallel simulator. The simulator's performance and optimal processor number are also estimated. By providing a parallel simulation approach, the study offers valuable insights for researchers and developers working with complex neural network models. The architecture and performance analysis can help guide the design of future simulation platforms.