IBM TotalStorage Enterprise Tape Controller 3592 Model J70 is designed to provide new levels of performance and attachment capabilities for S/390 and eServer zSeries customers. The 3592 Model J70 Controller has up to four 2-Gbps FICON attachments. The 3592 Model J70 also has up to eight ESCON attachments or an intermix of ESCON and FICON attachments.