  Global System for Mobile Communications (GSM) is a cellular network that is
popular and has been growing in recent years. It was developed to solve
fragmentation issues of the first cellular system, and it addresses digital
modulation methods, level of the network structure, and services. It is
fundamental for organizations to become learning organizations to keep up with
the technology changes for network services to be at a competitive level. A
simulation analysis using the NetSim tool in this paper is presented for
comparing different cellular network codecs for GSM network performance. These
parameters such as throughput, delay, and jitter are analyzed for the quality
of service provided by each network codec. Unicast application for the cellular
network is modeled for different network scenarios. Depending on the evaluation
and simulation, it was discovered that G.711, GSM_FR, and GSM-EFR performed
better than the other codecs, and they are considered to be the best codecs for
cellular networks. These codecs will be of best use to better the performance
of the network in the near future.
