Kramer Electronics SD-7588A VS-7588A is a high performance matrix switcher for digital audio (S/PDIF and AES/EBU) signals. It can route any or all inputs to any or all outputs simultaneously on 110 ohm twisted pair cable. Standards - AES/EBU, IEC 958, S/PDIF, and EIAJ CP340/1201. Reclocking and Equalization - Automatic. Control - Front panel, RS-232 (K-Router Windows - based software is included), and RS- 485. Worldwide Power Supply - 85-264V AC. Standard 19inch Rack Mount Size - 1U.