These Chassis provide a non-blocking, full fan-out matrix in any configuration from 64x64 to 256x256. The standard chassis switches differential RS422 up to 20 Mbps or single ended TTL data up to 40 Mbps. Custom buffer modules allow for single ended 75 ohm TTL signals up to 80 Mbps. Systems may be configured as dual 128x128 for Clock and Data signals. D78 connectors are standard and may be taken out to patch panels for almost any other connector such as BNC, Twinax, Triax or other D types. 75 ohm TTL systems are patched to 75 ohm BNC's.