XKLXKL XKL Based in Redmond, Washington XKL, LLC, is an American company that develops optical transport technologies. Founded in 1991, XKL is led by Cisco Systems co-founder Len Bosack who also used to work for DEC and Bell Labs. Under Bosack, Cisco commercialized local area network (LAN) technology to connect geographically to computers over a multiprotocol router system. History of XKL. In its earliest days XKL developed, and in 1995 introduced, the TOAD-1, a compact, modern replacement for PDP-10 systems, mainframe computer systems that had gone out of production. Products. TOAD-1. The TOAD-1 System, also known as TD-1, was announced  in 1993 and built as an extended version of the DECSYSTEM-20 from Digital Equipment Corporation. The original inspiration was to build a desktop version of the popular PDP-10 and the name began as an acronym for "Ten On A Desk". It was eventually built at XKL by veteran engineers from Cisco, DEC, Hewlett-Packard, and CDC. It was the first XKL product produced and it became available for purchase in late 1995. The TOAD-1 is a high-performance I/O oriented system with a 36-bit processor running TOPS-20. It is a 36-bit multi-user system that can provide  service to over 100 users at a time. The TOAD-1 architecture incorporates modern peripherals, and open bus architecture, expanded physical and virtual memory while maintaining the TOPS-20 user environment. TOAD-2. The TOAD-2 was built to replace the TOAD-1. It is a single chip reimplementation used as redundant control processors in networking equipment from XKL. It cna be configured for TOPS-20 timesharing. Darkstar DXM. First released in 2007, the Darkstar DXM is a high-performance optical switch first installed at the California Institute of Technology as part of their Supercomputing Bandwidth Challenge. It provides 5 times the bandwidth, in excess of  100 Gigabits/sec, than the existing system but is also smaller and uses less power. XKL Based in Redmond, Washington XKL, LLC, is an American company that develops optical transport technologies. Founded in 1991, XKL is led by Cisco Systems co-founder Len Bosack who also used to work for DEC and Bell Labs. Under Bosack, Cisco commercialized local area network (LAN) technology to connect geographically to computers over a multiprotocol router system. History of XKL. In its earliest days XKL developed, and in 1995 introduced, the TOAD-1, a compact, modern replacement for PDP-10 systems, mainframe computer systems that had