Inim PREVIDIA-C-DIAL4G internal dialler module, EN54-21 certified. Communicates over PSTN line and GSM/4G network. Sends voice, digital messages (Contact ID, SIA-IP) and SMS messages. The Inim Cloud Fire can connect via the 4G network. This connection can be used either as the primary connection or as a backup for the Ethernet connection. Only for PREVIDIA COMPACT and MICRO control panels. An external antenna is included.