XKL

XKL, LLC is an American company that develops optical transport networking technologies.[1] Founded in 1991 and based in Redmond, Washington, XKL is led by Cisco Systems co-founder Len Bosack.

XKL, LLC
TypePrivate
IndustryTelecommunications
Optical networking
Computer Networking
Founded1991 (1991)
FounderLen Bosack
Headquarters
Redmond, Washington
,
U.S.A
Area served
Worldwide
Key people
Len Bosack and Sandra Lerner
ProductsDarkstar Optical Network Hardware
Websitewww.xkl.com

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.[2]

Products
TOAD-1 unit on display at the Living Computer Museum in Seattle, WA

Current Products

Products include transponder, muxponder, mux/demux (multiplexing/demultiplexing) and (optical) amplifier models.

DarkStar DQT10 Transponder

Supports 12, 24 or 36 10G channels.

DarkStar DQT100 Transponder

Aggregates up to 96 100G channels onto a single pair of fibers.

DarkStar DQT400 Transponder

Aggregates up to 48 100G / 400G channels

DarkStar DQM100 Muxponder

Aggregates up to 12 100G channels via statistical multiplexing.

DarkStar DQM10 Muxponder

Aggregates up to 36 10G channels.

DarkStar DSM10-10 Muxponder

Aggregates up to 100G services.

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.[3]

TOAD-1

The TOAD-1 System, also known as TD-1,[notes 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.[4]

XKL TOAD-2 on display at the Living Computer Museum in Seattle, Washington.
Full view of the XKL TOAD-2 on display at the Living Computer Museum in Seattle, Washington.

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.[1]

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 can be configured for TOPS-20 timesharing.[4]

See also

Other companies that produced PDP-10 compatible computers:

Notes
  1. The TOAD-1 was referred to as the TOAD as a development codename and then changed to the TD-1 as the original marketing name. It was then switched back to TOAD-1 before production began.

References
  1. "XKL Flier". Retrieved 29 June 2016.
  2. "LCM+L - XKL TOAD-1 System". livingcomputers.org. Living Computers: Museum + Labs. Retrieved 26 April 2022.
  3. "XKL, LLC: XKL Supports Caltech in Supercomputing '08 Bandwidth Challenge". Internet Archive: Wayback Machine. 6 October 2009. Archived from the original on October 6, 2009. Retrieved 12 July 2016.
  4. "Exhibits - Living Computer Museum". www.livingcomputermuseum.org.
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