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--- networking:fiber_optics [2024/06/13 13:17] – 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**
+{{ youtube>LaKZ5DDRPS8 }}
 {{ :networking:fiber_optics.jpeg?800 |}}
@@ Line 57: / 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 88: / 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 121: / 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).
+----
+----