General Dynamics C4 Systems Receives Contract to Add Switched Network Compatibility

General Dynamics C4 Systems will add a new public switched telephone network (PSTN) feature to the Sectéra vIPer universal secure phone in a $2.8 million contract awarded by the National Security Agency. The new feature, "PSTN Connect," will enable the vIPer phone to connect with traditional telephone networks, enabling users of secure desktop phones to use one secure phone on either PSTN or voice over Internet protocol (VoIP) networks.