Progress in Signals and Telecommunication Engineering Seferin Mirtchev, Rossitza Goleva, Georgi Balabanov and Velko Alexiev 12 2 2023 https://www.dline.info/pste/fulltext/v12n2/pstev12n2_3.pdf To define the peaked arrival processes, we have outlined the Polya and Pareto distribution processes. We are able to assess the actual loss of data in telecommunication systems. This is a fully accessible loss system with Polya input flow that is the negative binomial distributed number of arrivals in a fixed time interval, general allocated service time and “n” servers. We have assessed the model with Pareto distributed inter-arrival time using simulation data. We have developed an algorithm for the calculation of the state probabilities and outlined the blocking. We found that the input stream changes influence the loss system properties.