[olug] Fiber question for you guys

[Aric Aasgaard]

IDK maybe they are using multi-mode with a mode conditioning cable?

I only have old multimode stuff at work.
........I guess I can help by giving random thoughts and bumping your thread.

-----Original Message-----
From: olug-bounces at olug.org [mailto:olug-bounces at olug.org] On Behalf Of Justin Reiners
Sent: Friday, April 29, 2016 11:13 AM
To: Omaha Linux User Group <olug at olug.org>
Subject: Re: [olug] Fiber question for you guys

Cox and Centurylink both drop fiber in my building and hand off optically, via SMF. I terminate the fiber on Crisco switches for media conversion using an SFP. The patch has to be SMF, because that is what my SFP handles.
With the old fiber patch plugged in I get link lights, so I think I can assume that the existing patch is in fact SMF, right?? :) I am more confused than anything at this point. 2x25ft SMF cables were 68 bucks.
Issue is, the ends are duplex so I cannot swap them, but it does in fact look like they are crossed over correctly. I was just curious if there was something I might be missing.



*GLC-LH-SMD-LU*

100% Cisco Compatible
1000BASE-LH SFP, SMF, 1310nm, LC/PC transceiver High Quality with CE,RoHs,FCC

*Features & Specifications*

   - Form Factor: SFP
   - Device Type: Transceiver module
   - Interface (Bus) Type: Plug-in module
   - Connectivity Technology: Wired
   - Application: 1000BASE-LH
   - Data Transfer Rate: 1Gbps
   - Wavelength: 1310nm
   - Max Distance: 10KM
   - Fiber Type: SMF
   - Optical Components: LD: DFB, PD: PIN
   - Connector: Dual LC
   - DDM: With DDM
   - Operating Temperature: 0~70 °C
   - Compliant with MSA SFP Specification
   -


On Fri, Apr 29, 2016 at 10:45 AM, Aric Aasgaard <aric at omahax.com> wrote:

> Are you sure it isn't multi-mode?
> I would guess that the 10 footer is multimode and that probably won't 
> work with the single mode fiber patch cable that you are trying to use.
>
> Single mode is typically for long runs and takes much more expensive 
> optics.
> It would be odd to have a 10 foot single mode run.
>
> -----Original Message-----
> From: olug-bounces at olug.org [mailto:olug-bounces at olug.org] On Behalf 
> Of Justin Reiners
> Sent: Friday, April 29, 2016 9:34 AM
> To: Omaha Linux User Group <olug at olug.org>
> Subject: [olug] Fiber question for you guys
>
> I currently have Cox fiber installed here at my location, It is a 
> fiber drop with LC-LC connections, on single mode fiber. I purchased a 
> couple cables down in Bellevue to extend the run from about 10 feet to 
> 25. The existing thin, junk cable connects just fine, but both of my 
> new cables do nothing when plugged in. Does anyone have any ideas? I 
> terminate fiber to a cisco switch with a SMF dongle.
>
> These cables are much nicer and heavier, but I cannot get a link light 
> with them.
>
> --
>
> [image: Hotlines Inc] <http://www.partshotlines.com>
>
> Justin Reiners / System Administrator
> 800.308.9712/ justin at hotlinesinc.com <Justin at HotlinesInc.com>
>
> Hotlines Inc Office: 800.807.2867 / Fax: 800.211.0843
> 427 E. Kanesville Blvd. Suite 403, Council Bluffs, IA 51503 
> http://www.partshotlines.com 
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-- 

[image: Hotlines Inc] <http://www.partshotlines.com>

Justin Reiners / System Administrator
800.308.9712/ justin at hotlinesinc.com <Justin at HotlinesInc.com>

Hotlines Inc Office: 800.807.2867 / Fax: 800.211.0843
427 E. Kanesville Blvd. Suite 403, Council Bluffs, IA 51503 http://www.partshotlines.com _______________________________________________
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