Achieving 4–20,000 endpoints per 1U server, MAPS™ HD Message Automation and Protocol Simulation High Density network appliance performs signaling and traffic generation for vast array of communication protocols covering IP and wireless networks. System generates up to 350 calls per second and scales to around 100,000 endpoints with use of Master Controller for single point of control. With load generation feature, users can specify patterns with which bulk calls can be generated.