In this study we examine IP Header Reduction, the term we use for an approach which aims to reduce the IP Header for a specific point-to-point narrow band APCO Project-25 data links. The goal is to investigate opportunities for improving the utilization of IP connectivity on limited bandwidth link resources. We define and propose a simple protocol and messaging format. It's a software process which will run on both side of data links with its functionality. We also define communication protocol and message format which is used by these processes for intercommunication. Example scenario given in this study provides the idea behind how IP Header Reduction is realized. At the end of the study, potential bandwidth gain is calculated and produced at specified condition. It will be seen that especially for some limited bandwidth real time control or sensor data transfer applications which require small size but frequent data transfer, can significantly benefit from implementation of this study.