Secure voice and data communications
Data Crypto mode
In the Data Crypto mode (see Picture), the ELCRODAT4-2 can be integrated into a data transmission system equipped with interfaces in line with ITU-T V.24/V.10/ V.11/V.28 or X.21/V.11. Dialing protocols in line with ITU-T V.25bis or Hayes commands (AT commands) can be used.
The ED4-2 checks and identifies the dialing protocol or the Hayes commands sent by the data terminal equipment (DTE). The ED4-2 forwards the dailing information, synchronizes the called station and switches to encrypted mode.
The analog interface is used when the integrated LOS modem (in line with ITU-T V.26) or the HF modem (in line with STANAG 4197) is active.