Expansion module for TFCOM telephone communicator. It integrates GSM and LTE telecommunication vectors (4G standard). 16 communication protocols, plus 5 backup protocols for the PSTN vector. Transmission formats: Voice, SMS, Ring, DTMF, Data. Security: encrypted communications, supported 128-bit and 256-bit AES encryption, independent passphrase programming for each communicator. The module manages the VoLTE service (high resolution voice calls). Plug-in mounting on TFCOM board. EN 54-21:2006. Certification: 0051-CPR-0454.