ASTi was contracted by Logicon to design a sound solution for their Dahlgren, Virginia facility's Aegis Ship Trainer, the Aegis Communications System.

ASTi provided a networked voice and user control link between multiple operators and a rack of real-world radio transceivers and encryption devices, located in a separate building. Three DACSs (we'll call them 'Operator DACSs') provide binaural audio interfaces for 24 operators (a total of 48 audio channels) and 24 intercom nets for networked communications between the operators.

1. Two 8-Channel Waveform Synthesizers per DACS
2. Eight operators per DACS (24 total)
3. Max. simultaneous voicestreams = 2 Rx & 1 Tx per operator
4. Configuration Diagram

Additionally, a single DACS (the 'Radio DACS'), located in a remote building and linked to the Operator DACSs via the voice network, is digitally connected to the eight external secure radio circuits. This enables the operators to establish communications with the outside world.

1. One 8-Channel Waveform Synthesizers in DACS
2. One DI/DO board in DACS
3. Up to 8 real radio transceivers connected to & controlled by DACS
4. Configuration Diagram

ASTi provided the fiber optic links that were used to connect the voice and host networks between the Operator and Radio buildings.

The Operator DACSs receive operator panel state information from the host ethernet and transmit the control data (like Radio Selection, PTT and Secure Request) to the Radio DACS. The Radio DACS uses digital outputs to command the secure radios to 'Go Secure' and 'Transmit'. The Radio DACS uses digital inputs--as well as audio tone detection objects in the software's custom model--to sense controls from the Radio/Crypto circuits; this control data is transmitted over the host network to the operator interface panels to indicate 'Secure Acknowledge' and 'PTT Acknowledge'.

This system is routinely used during actual Naval fleet exercises to switch classified telephone circuits to external crypto radios and other networked shore sites with ASTi comms systems.