Introduction: The minimal age for cochlear implantation has been reduced and the use of objective measures is needed to facilitate speech processor programming. The electrically evoked compound potential (EAP), which can be assessed by neural response telemetry (NRT), is one of those objective measures. Objective: To determine how the EAP can be recorded by NRT system in the course of surgery and to describe their responses. Methods: The impedances and NRT were measured for a group of 17 Nucleus 24® implant users. The responses were analyzed and compared to the etiology, hearing loss duration and electrode array position. Results: The EAP was easier recorded in the apical electrodes and in otosclerosis and meningitis cases the EAP threshold was higher. Conclusions: The NRT can be used to ensure the electrode impedances and to assess the response of the auditory nerve to electrical stimulation during the surgery.