GLC-SX-MMD transmission distance 1000m

[MMKK]

Hello everyone.

I need help.

I am trying to connect IE-9320-26S2C-E to C1000 series with SFP(GLC-SX-MMD or GLC-SX-MM-RGD).
Looking for GLC-SX-MMD transceiver 1G, I can see the specification for transfer of distance to 1000m, however I can see the other specification for transfer of distance to 550m.
The cable will be laid with MMF, but is it possible to communicate with this SFP?

Thanks for your help.
Regards

[balaji.bandi]

check the matrix - what cable(Table 2.        SFP Port cabling specifications) you need to meet the requirement and also choose the right SFP for Long reach :

https://www.cisco.com/c/en/us/products/collateral/interfaces-modules/gigabit-ethernet-gbic-sfp-modules/datasheet-c78-366584.html

[Joseph W. Doherty · Accepted solution]

"Looking for GLC-SX-MMD transceiver 1G, I can see the specification for transfer of distance to 1000m, however I can see the other specification for transfer of distance to 550m."

In addition to what using the correct SFP, for SX and MM fiber, for 550M you need OM2, for 1000 M, you need OM3 or better MM fiber.  (Also noted in @balaji.bandi referenced table 2.)

"The cable will be laid with MMF, but is it possible to communicate with this SFP?"

Sure, basically SFP vs. GLC is the optical transceiver type.  It's the fiber standard and fiber type the transceivers use, that matters.

[Leo Laohoo]

1km on 1 Gbps would need OM2 as a minimum.  

And in this day and age, with current "standard" is OM4, no reputable cabler will put down anything lower than OM3.

[MMKK]

Hi. All,

Thanks for your crarification.
I will prepare the cable according to the documentation.
Just a small query, If I connect for the "OM4" MMF cable with about 850m distance.
Is there anything I should be aware of anything?

[balaji.bandi · Accepted solution]

Personally, I have not got that Long cable to test with OM4 - I only read the documentation and rely on the information.

But personally using OS2  - you can reach more range, for that you need LH / LR SFP Module (this was tested and confirmed)

[Joseph W. Doherty · Accepted solution]

Anything else?  Possibly yes.

I believe fiber distance standards are based on using continuous fiber end-to-end.  Any fiber junctions/connections/splices, e.g. fiber patch panel, I also believe can increase link loss whose effect is like increasing fiber distance.