The latest crises (IRMA and MARIA Cylons in September 2017, fire at Pointe-à-Pitre Hospital in November 2017, and more recently, COVID-19 pandemic) have shown the importance for healthcare institutions to have a communication system, and in particular telephony, fully secure and fully operational to help with crisis management. In addition, the recent health crisis highlighted the importance of investing in modern technologies to ensure continuity of care in a context where access to the hospital was strictly limited (containment). Thus, the number of remote follow-ups performed by practitioners has increased significantly in recent months, be it chronic patients or new patients. In this context, the use of telemedicine has emerged as one of the key levers of crisis management, both through teleconsultations, including by telephone following the adaptation of the relevant regulations, as well as teleexpertise and remote monitoring. However, the Centre Hospitalier de Basse Terre relies for its telephony needs on a private telephone switch that is obsolete and no longer covers the expectations or needs of the institution.