Is it possible to connect a SX GBIC to both single-mode fiber and mulitmode fiber? What will be the effect of LX GBIC to both single-mode fiber and mulitmode fiber?
Without using some type of mode conditioner or conversion device, single-mode fiber (SMF) transceivers (e.g. GBIC and SFP) need to attach to SMF cabling and other SMF transceivers. The same holds true for multimode fiber (MMF) transceivers and devices. Short-range or short-distance transceivers such as GBICs and SFPs (also known as SX) utilize MMF cabling unless some type of mode conditioner or conversion device is employed to attach to SMF. Long-distance transceivers (also known as LX) typically utilize SMF cabling.
The fundamental difference lies in the type of cabling and optical transceivers. SX transceivers utilize lower-powered, lower-cost optics and lower-cost, shorter-distance MMF cabling while LX utilizes higher-powered, more accurate optics for longer distance with more expensive SMF cabling.
Keep in mind that when you introduce a mode conditioner or mode conversion device, you will introduce additional degradation into the optical signal (e.g. db loss). SX and MMF should enable distances depending on speed (e.g. 1Gbit, 2Gbit, 4Gbit, 10Gbit) of the interface to a couple of hundred meters (actual distance will vary with speed). Using SMF and LX transceivers and depending upon optical cabling, repeaters and other technology including CWDM, WDM and DWDM distances of 10s to 100s of kilometers can be supported. Avoid simply looking at distance and attainable bandwidth supported and also look at effective latency and effective bandwidth over the supported distance.
Dig deeper on Fibre Channel (FC) SAN
Related Q&A from Greg Schulz
Service provider outages should be a warning to customers that keeping data safe in the cloud is a shared responsibility.continue reading
When cloud durability is added to the mix, cloud providers are able to tout a high number of nines of availability.continue reading
Cloud storage can be less expensive from a cost-per-gigabyte perspective, but it's important not to lose sight of other benefits as a value ...continue reading
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.