nanog mailing list archives
Re: Cable standards question
From: Jonathan Lassoff <jof () thejof com>
Date: Mon, 14 Nov 2011 07:38:38 -0800
On Mon, Nov 14, 2011 at 7:12 AM, Jon Lewis <jlewis () lewis org> wrote:
On Mon, 14 Nov 2011, Sam (Walter) Gailey wrote: My question is this; Is there an appropriate standard to specify forfiber-optic cabling that if it is followed the fiber will be installed correctly? Would specifying TIA/EIA 568-C.3, for example, be correct? I'm envisioning something like; "The vendor will provide fiber connectivity between (building A) and (building B). Vendor will be responsible for all building penetrations and terminations. When installing the fiber-optic cable the vendor will follow the appropriate TIA/EIA 568 standards for fiber-optic cabling."At minimum, I think you should probably specify the type and number of fibers you want. i.e. Based on the distance and gear you'll be using, do you need single-mode, or will multi-mode do (as well as the core/cladding diameter)? Generally, but not always, fiber uses one strand for transmit and another for receive, so a typical fiber run is done using duplex fiber. Some optics can transmit and receive over one strand using different wavelengths. You might even specify how you want the fiber terminated (SC, LC, cables hanging from the wall, fiber patch panel, etc.).
I'd agree with this. I wouldn't worry about the standard so much as the practical aspects of a run. Once you have an idea of the approximate distance of the run, you can figure out which optics you plan on using. This will determine what physical connectors you'll need and what your approximate link budget will be. Based on that information, you can figure out which type to ask for (9um/125um single-mode, most likely), a range of path loss that you're comfortable with, and the physical termination you'd like at either end. Cheers, jof
Current thread:
- Cable standards question Sam (Walter) Gailey (Nov 14)
- Re: Cable standards question Daniel Seagraves (Nov 14)
- RE: Cable standards question Sam (Walter) Gailey (Nov 14)
- Re: Cable standards question Jon Lewis (Nov 14)
- Re: Cable standards question Jonathan Lassoff (Nov 14)
- Re: Cable standards question Jay Ashworth (Nov 14)
- Re: Cable standards question Jonathan Lassoff (Nov 14)
- RE: Cable standards question Kenneth M. Chipps Ph.D. (Nov 14)
- Re: Cable standards question Justin M. Streiner (Nov 14)
- RE: Cable standards question Jason Gurtz (Nov 14)
- Re: Cable standards question Jay Ashworth (Nov 14)
- RE: Cable standards question Jason Gurtz (Nov 14)
- RE: Cable standards question Holmes,David A (Nov 14)
- Re: Cable standards question Daniel Seagraves (Nov 14)