This model represents a queueing system where is a geometric random variable. It is basically made of the same objects as the model (Poisson source and Exponential server), with an additional object acting as an interface between the two, as shown in figure .
The Geometric_Bulk object receives the Packet_Generation events from the Poisson source and generates a number of packets for the exponential server that is geometrically-distributed with parameter , where is a constant declared in the object. In this example, we are not very concerned with taking measures from the system but instead we will focus on the modeling technique employed in the Geometric_Bulk object.