An overview of the similarities and differences are presented below for guidance. Please reference the ACE-RIU and ACU2 user guides for the full feature set and specifications to ensure the correct device selection for your application.
| Feature | ACE-RIU | ACU2 |
|---|---|---|
| Standalone | Yes | Yes |
| Rackmount | Yes (3 per 1U) | Yes (2 per 1U) |
| Legacy Cable Support | DACS RIU | T3 IRIS / Telestra ACU |
| Audio/Control Connectors | 4 × DB-9 | 4 × DB-15 |
| Audio Outputs | 4 mono channels (1 per connector) |
4 stereo channels (1 stereo pair per connector) |
| Audio Inputs | 4 mono channels (1 per connector) |
4 mono channels (1 per connector) |
| Audio Gain Control | Hardware jumpers | Software-controlled |
| Control Inputs | 4 digital (1 per connector) |
12 digital or analog (3 per connector) |
| Control Outputs | 4 opto-isolated digital (1 per connector) |
4 opto-isolated digital (1 per connector) |
| Serial Ports | 2 × RS-422 | 2 × RS-422/RS-232 |