General Dynamics C4 Systems designs and develops high-assurance wireless and wireline secure communication solutions for GSM, ISDN, PSTN, VoIP and satellite networks. The TalkSECURE& Wireless/Wireline communication products offer end-to-end voice/data encryption for law enforcement and first responders. Products are easy to use and provide high voice quality for mobile or desktop communications. They provide interoperable secure communications across local, state and federal law enforcement agencies and are secured with the AES encryption algorithm to protect sensitive-but-unclassified communications. TalkSECURE products also feature software programmable and upgradeable flexibility.