maximum distance 1000basex gbics

[joseph-wong]

where can i find specs for 1000basex gbics regarding maximum distances for smf and mmf all(in one location) i have read a couple of articles and have got diferring answers. i intend to use a couple of ws-c2924m-xl-en switches at gigabit speeds for point to point links between buildings from distances ranging from 300meters to just over 1km using 50 or 62.5 micron fiber.

[kfee]

This link has a table with the distances and fiber supported per GBIC:

http://www.cisco.com/univercd/cc/td/doc/product/lan/cat5000/cnfg_nts/ethernet/5399_01.htm#xtocid44297

[candv]

We have 650+metres on 62.5/125 mmf, no problems even though Sx's should be 220metres

[jselman1]

I would just go with the single mode (50micron) to ensure that you will be ok. The part number is:

WS-G5486 1000BASE-LX/LH "long haul" GBIC (singlemode or multimode) D $1,500

[jshead]

just to let you know..

62.5/125 european industry multimode

50/125 american industry multimode

8 or 9/125 is singlemode...

50 micron fibre is not singlemode..bloody works better than 62.5/125 though

cheers

julian

[rleguede]

You should see a spec on cisco site but you may adjust these cisco's spec by calculating the atténuation of your fiber circuit. (0.5 dB per by cut on the circuit). At last you withdraw the distance due to the attenuation in the cisco's spec distance. This will give you the real distance you can use.

regards

[jshead]

readme:

sx 220m 62.5/125 mmf

sx 550m 50/125 mmf

lx 500m 62.5/125 mmf needs conditioning cable

zx 70km 9/125 smf

and in answer to those you exceed these limits, I have a 250m utp feed it works.. but is it optimal...

NO..! the industry has spent years perfecting optimal performance... wake up and smell the coffee..

[blickled]

I believe the specification is written in terms of light loss. Cisco has just choosen to estimate that number to meters based on average loss.