07-22-2005 01:39 AM - edited 03-02-2019 11:28 PM
Does 1 GBIC support both 50 and 62.5 micron connections or are there differnet GBIC's for 50 micron and others for 62.5 micron ?
I've got a GBIC switch with both 50 and 62.5 micron connections on identical GBIC's and I'm curious if this can cause any problems
Solved! Go to Solution.
07-22-2005 02:24 AM
Hi there,
The MM-GBIC's support both 50/125 and 62.5/125 mm fibers. There are no special GBIC's just for one of the two.
There should be no problems running 50/125 and 62.5/125 mm fibers on a single switch and identical GBIC's.
Check this page for more info on the specs:
Check this link for technical specs on the C3550 switch and fiber ports:
Here's a quick intro to what the different types are:
Multimode silica fibers are currently produced with step and graded refractive index profiles. Step index fibres are defined in the IEC standards IEC 793-1 and IEC 793-2, category A2, and are designed for applications in data transmission over distances up to 2 km, with transmitters operating at 850 nm. There are three different core/cladding diameters standards: 100/140 µm, 200/240 µm, and 200/280 µm. All three types of fiber have a numerical aperture between 0.23 and 0.26.
Two types of graded index multimode fibers (GI-MMF) exist, according to whether the fiber is intended for use in LAN systems or in telecommunications. Those for telecommunications are defined in ITU G.651 and have core/cladding dimensions of 50/125 µm and a numerical aperture of 0.2, while those for LANs are defined in EIA/TIA 568 and ISO/IEC 11801, and have core/cladding dimensions of 62.5/125 µm, and a numerical aperture of 0.275.
Of the above fiber types, those with graded index profiles and core diameters of 50 µm and, especially, 62.5 µm are considered 'normal' MMF-fibers and used extensively because of their superior attenuation and bandwidth performance.
Did it help?
07-22-2005 02:24 AM
Hi there,
The MM-GBIC's support both 50/125 and 62.5/125 mm fibers. There are no special GBIC's just for one of the two.
There should be no problems running 50/125 and 62.5/125 mm fibers on a single switch and identical GBIC's.
Check this page for more info on the specs:
Check this link for technical specs on the C3550 switch and fiber ports:
Here's a quick intro to what the different types are:
Multimode silica fibers are currently produced with step and graded refractive index profiles. Step index fibres are defined in the IEC standards IEC 793-1 and IEC 793-2, category A2, and are designed for applications in data transmission over distances up to 2 km, with transmitters operating at 850 nm. There are three different core/cladding diameters standards: 100/140 µm, 200/240 µm, and 200/280 µm. All three types of fiber have a numerical aperture between 0.23 and 0.26.
Two types of graded index multimode fibers (GI-MMF) exist, according to whether the fiber is intended for use in LAN systems or in telecommunications. Those for telecommunications are defined in ITU G.651 and have core/cladding dimensions of 50/125 µm and a numerical aperture of 0.2, while those for LANs are defined in EIA/TIA 568 and ISO/IEC 11801, and have core/cladding dimensions of 62.5/125 µm, and a numerical aperture of 0.275.
Of the above fiber types, those with graded index profiles and core diameters of 50 µm and, especially, 62.5 µm are considered 'normal' MMF-fibers and used extensively because of their superior attenuation and bandwidth performance.
Did it help?
10-05-2005 08:29 AM
We're installing 50 uM fiber to a new location -- 1032 feet. Can we get away with using 62.5 uM patch cables at the ends to connect to WS-G5484 or GLC-SX-MM GBICs? (We've got them on hand already -- anything to save a buck.) I suspect we can go from the 50 uM cable through the 62.5 uM patch to the switch, but the opposite-direction flow might have problems with the narrowing of the aperture.
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide