Differences

This shows you the differences between two versions of the page.

--- networking:fiber_optics [2023/07/15 18:46] – aperez
+++ networking:fiber_optics [2025/04/01 11:14] (current) – aperez
@@ Line 1: / Line 1: @@
 **Multimode Fiber Types: OM1 vs OM2 vs OM3 vs OM4 vs OM5**
-{{:networking:fiber_optics.jpeg?800|}}
+{{ youtube>LaKZ5DDRPS8 }}
+{{ :networking:fiber_optics.jpeg?800 |}}
+{{ :networking:fb1.jpeg?400 |}}
+{{ :networking:multimodo.jpg?600 |}}
 **Multimode fiber** is a common choice to achieve 10 Gbit/s speed over distances required by LAN enterprise and data center applications. There are several kinds of multimode fiber types available for high-speed network installations, and each with a different reach and data-rate capability. With so many options, it can be tough to select the most suitable multimode fiber. OM1 vs OM2 vs OM3 vs OM4 vs OM5, which to choose? You may get answer in this article.
@@ Line 9: / Line 15: @@
 Multimode fiber (MMF) is a kind of optical fiber mostly used in communication over short distances, for example, inside a building or for the campus. Multimode fiber optic cable has a larger core, typically 50 or 62.5 microns that enables multiple light modes to be propagated. Because of this, more data can pass through the multimode fiber core at a given time. The maximum transmission distance for MMF cable is around 550m at the speed of 10Git/s. It can transmit farther at lower data rates, such as going about 2km at 100Mb/s.
-{{:networking:mmf-1.jpg?600|}}
+{{ :networking:mmf-1.jpg?600 |}}
@@ Line 16: / Line 22: @@
 Identified by ISO 11801 standard, multimode fiber optic cables can be classified into OM1 fiber, OM2 fiber, OM3 fiber, OM4 fiber and newly released OM5 fiber. The next part will compare these fibers from the side of core size, bandwidth, data rate, distance, color and optical source in details.
-{{:networking:multimode-fiber-cable.jpg?600|}}
+{{ :networking:multimode-fiber-cable.jpg?600 |}}
 **OM1 Fiber**
@@ Line 53: / Line 59: @@
-  MMF  Category	Fast Ethernet	1GbE	10GbE	40GbE	100GbE
+^ MMF Category ^ Fast Ethernet ^ 1GbE ^ 10GbE ^ 40GbE ^ 100GbE ^
-  OM1 	        2000m	        275m	33m	/	/
+| OM1          | 2000m         | 275m  | 33m   | /     | /      |
-  OM2 	        2000m	        550m	82m	/	/
+| OM2          | 2000m         | 550m  | 82m   | /     | /      |
-  OM3 	        2000m	        /	300m	100m	70m
+| OM3          | 2000m         | /     | 300m  | 100m  | 70m    |
-  OM4 	        2000m	        /	550m	150m	150m
+| OM4          | 2000m         | /     | 550m  | 150m  | 150m   |
-  OM5 	        /	        /	550m	150m	150m
+| OM5          | /             | /     | 550m  | 150m  | 150m   |
 **What’s the Differences Between Single Mode and Multimode Fiber?**
@@ Line 84: / Line 91: @@
-   MMF Connector    Ferrule Size      Typical Insertion Loss (dB)    Cost(FS.com)     Application Features
+<div style="text-align: center;">
-   SC	            φ2.5mm ceramic    0.25-0.5	                     US$ 0.65	      Mainstream, reliable, fast
+^ MMF Connector ^ Ferrule Size ^ Typical Insertion Loss (dB) ^ Cost (FS.com) ^ Application Features ^
-                                                                                      deployment, filed fit
+| SC            | φ2.5mm ceramic   | 0.25-0.5                    | US$ 0.65        | Mainstream, reliable, fast deployment, field fit |
+| LC            | φ1.25mm ceramic  | 0.25-0.5                    | US$ 0.78        | High density, cost-effective, field fit |
-   LC	            φ1.25mm ceramic   0.25-0.5	                     US$ 0.78	      High density, cost-
+| FC            | φ2.5mm ceramic   | 0.25-0.5                    | US$ 0.74        | High precision, vibration environment, field fit |
-                                                                                      effective,filed fit
+| ST            | φ2.5mm ceramic   | 0.25-0.5                    | US$ 0.61        | Military, field fit |
+</div>
-   FC	            φ2.5mm ceramic    0.25-0.5	                     US$ 0.74	      High precision, vibration
-                                                                                      environment, field fit
-   ST	            φ2.5mm ceramic    0.25-0.5	                     US$ 0.61	      Military, filed fit
 **What’s The Advantages of Multimode Fiber?**
@@ Line 117: / Line 122: @@
+----
+----
+====== LRM (Long Reach Multimode) ======
+LRM stands for Long Reach Multimode, which is an optical connectivity standard defined in **IEEE 802.3aq**.
+Main Characteristics:
+Allows data transmission over multimode fiber (MMF) at longer distances than typically supported by standard multimode modules (such as SX or SR).
+**Specifically designed to work up to 220 meters over OM1, OM2, and OM3 multimode fiber (usually 62.5/125 μm or 50/125 μm).
+**
+Uses SFP+ LRM modules that generally operate at 10 Gbps.
+Commonly used in installations that need to reuse existing multimode cabling without having to replace it with single-mode fiber (SMF).
+----
+----