The LTE communication protocol is more and more employed in the railway domain. Indeed, the LTE throughput enables railway companies to offer Wi-Fi connections to their customers inside the trains. LTE is also used in innovation projects such as remote train control and autonomous trains. However, there is no standard laboratory procedure to test this type of communication system face to electromagnetic interference present in the railway environment. In this context, we investigate the LTE susceptibility to transient electromagnetic interference sequences produced by the catenary pantograph contact. We proposed a test bench and process and we analysed the repeatability of susceptibility test performed on LTE communications.