The 9801 Storage Networking System (SNS) is synonymous with high performance storage networking, while at the same time reducing overall bandwidth and networking costs. With the 9801 SNS you can reduce circuit rerouting to maintain network availability and reduce application downtime. Certified by EMC and Hitachi Data Systems, and authorized to extend PPRC by IBM, the 9801 SNS works in conjunction with these storage vendors to extend and support their disk mirroring applications. With the 9801 in use, the extension of multiple applications---or any ESCON® device---is possible for regional and metropolitan networks