Pierre-Marie, There is no distinction between "Dark" and "Lit" fiber as far as standards compliance. I suspect that you will find the majority of dark fiber isn't actually dark but certain (DWDM) wavelengths on it are lit (in-use) and others are dark (not in-use). For example on a particular link, 5 DWDM channels may be in-use while 35 are dark. If you are meeting the appropriate IEEE 802.3x spec, I don't know of anything further that you would need to do. ...Marko
-----Original Message----- From: Andre, Pierre-Marie [mailto:pierre-marie.an...@intel.com] Sent: Monday, March 17, 2003 5:28 AM To: emc-p...@majordomo.ieee.org; treg@world.std.com Subject: Dark Fiber and Regulation Hi there, Could somebody bring some light (!) on the so called "Dark Fiber" offering. Here is one definition I found : Dark fiber is optical fiber infrastructure (cabling and repeaters) that is currently in place but is not being used. Optical fiber conveys information in the form of light pulses so the "dark" means no light pulses are being sent "Dark fiber service" is service provided by local exchange carriers (LECs) for the maintenance of optical fiber transmission capacity between customer locations in which the light for the fiber is provided by the customer rather than the LEC. My question : The LAN product I am looking for regulation is conform to IEEE 802.3z,so the interface have been defined. Is there any standards or technical specifications for the "Dark Fiber" infrastructure ? Should I ask to each Dark Fiber Provider to get this info ? Best regards Pierre-Marie Andre Senior Approval Engineer
