1 Gbps, 2,5Gbps and 10Gbps long distance on OM1 62.5/125µm multimode fiber. Experience?

[Pello]

After some research I found that the normal length limitations of OM1 optic fiber have been extended quite a bit. The OM1 62.5/125 multimode limitations have been extended from 275 meter up to 2km on 1Gbps and from 33m up to 300 meters on 10Gbps. Or more...?

Do people here have experience with adapters that extends the length almost 10 times from original specifications? What is the longest 1Gbps and 10Gbps over OM1 fiber people got? Have anyone been able to get 2km for 1Gbps and 300m for 10Gbps stable? What equipment was used?


Interesting 10Gbps length test on OM2
640 meter - 10G XFP LR with 1310nm
1740 meters - 10G XFP ER at 1550nm

How to achieve a robust 10g Ethernet link, using old multimode fiber OM2 / OM1

For a few weeks running now, we have been covering the subject of multimode optic installations, something which used to be standard practice in very many 20-year old buildings. In those days, they were mainly of the OM1 (62,5/125) and OM2 (50/125) type, which were widely used at the time, for...

www.flexoptix.net

Below is a list of parts I found.

1 Gbps SFP modules
Here are some modules I found. Most are not specific. Only one I found says support 2km on OM1. All of them is 1310 nm.

OM1 - 2km
Transition Networks TN-SFP-ESX6 Gigabit Extended MM SFP 1000Base-SX 1300nm Mmlc 2km 62.5micron (TN-SFP-ESX6)

Gigabit Extended MM SFP 1000Base-SX 1300nm Mmlc 2km 62.5micron

The TN-SFP-XXX Small Form Factor Pluggable (SFP) transceivers are designed for bi-directional serial optical data communications. The device is designed for use in Switches and routers compatible with Small Form Factor Pluggable Multi-Sourcing Agreement (MSA).Temperature: -10C to 85C, Min TX Power

www.hardwarejet.com

Only mentions MMF multimode
SFP 1000BASE-SX+ 1310nm LC MMF DDM 2km (Model: LO-SF-1G-SX31)

SFP 1000BASE-SX+ 1310nm LC MMF DDM 2km

SFP SX+ multimode optical module, 1Gb speed, LC duplex connector, 2 km range

fibermarkt.com

Only mentions OM2 50/125µm multi-mode
Generic Compatible 1000BASE-LXL SFP Multimode 1310nm 2km Transceiver (OSP1250-312xCR)

Generic Compatible 1000BASE-LXL SFP Multimode 1310nm 2km Transceiver

1G Multi-mode 1310nm 2km SFP SX Optical Transceiver from Manufacturer at Affordable Factory Price,5-Year Warranty & Money-back Guarantee.

www.optcore.net

62,5µm MMF/OM1 1km - 50/125µm/OM2 2km 50/125µm
D-Link SFP-SX-MM-2K comp. 1G Multimode 1310nm 2km SFP (F24-DL-SFP-SX-MM-2K)

SFP Multi-Mode 1310nm 1 Gbit/s

SFP modules for data transmission on multimode fibre with 1310nm with up to 1G

shop.fiber24.net

50/125μm or 62.5/125μm Multi-mode - "Max 2km"
SFP: 1000BASE-SX Gigabit Ethernet Multi-mode Fiber Extended Temperature (SFP-M-2KM-G-W)

SFP Transceiver

Small form-factor pluggable (SFP) transceiver from Pepperl+Fuchs are not affected by electromagnetic radiation and enable efficient data transfer at Faster Ethernet or Gigabit speeds across long distances up to 120 km. Learn more ...

www.pepperl-fuchs.com

1km on OM1, 2km on OM2
HP SFP-SX-MM-2K comp. 1G Multimode 1310nm 2km SFP (F24-HP-SFP-SX-MM-2K)

HP SFP-SX-MM-2K comp. 1G Multimode 1310nm 2km SFP

HP SFP-SX-MM-2K Compatible Multi-mode 2km 1310nm SFP Transceiver

shop.fiber24.net

Only melons SMF/MMF but not what multimode version.
Generic Compatible 1000BASE-SX SFP 1310nm 2km DOM Duplex LC/UPC SMF/MMF Optical Transceiver Module Hot (SFP1G-SX-31)

https://www.fs.com/products/75793.html?now_cid=81

2.5 Gbps SFP modules
There is also few 2.5Gbps SFP modules. I thought they would support longer distance than 10GBase-LRM modules but specifications says no. All is 850nm.

Only mentions MMF ... Up to 300 meter.
Generic Compatible 2.5GBASE-SX SFP 850nm 300m DOM Duplex LC/UPC MMF Optical Transceiver Module (SFP2.5G-SX-85)

https://www.fs.com/products/190345.html?now_cid=4080

Up to 300m on 50/125µm MMF
Optcore 2.5G Multi-mode 850nm 300m SR SFP Transceiver (OSP2488-8503DCR)

Optcore 2.5G Multi-mode 850nm 300m SR SFP Transceiver

2.5G STM-16/OC-48 multi-mode 300m SR SFP Transceiver from Manufacturer at Affordable Factory Price,5-Year Warranty & Money-back Guarantee.

www.optcore.net

300m transmission with 50/125μm MMF
Multi-rate 2.67G multi-mode SFP 850nm, 300m, 155M to 2.67G

Multi-rate 2.67G multi-mode SFP 850nm, 300m, 155M to 2.67G

The SFP-9000-85 is a multi-rate multi-mode SFP 850nm, 300m, 155M to 2.67G transceiver using 850nm wavelength and reaching up to 300m distance on 50/125um fiber.

www.robofiber.com

Over OM1 170 meter, OM2 200m, OM3 550m, OM4 500m, OM5 ?
SFP-2.5G Series - 1-port 2.5 Gigabit Ethernet SFP modules

https://www.moxa.com/en/products/accessories/sfp-modules/2-5-gigabit-ethernet-sfp-modules/sfp-2-5g-series#specifications

10 Gbps SFP modules
For 10Gbps the 10GBase-LRM (Long Range Mode) standard at 1310nm officially extends to 220 meter or 720 ft. 10GBase-LRM over OM1 and OM2 multimode apparently needs a "mode conditioning patch cord" to work. All is 1310nm except Ubiquiti that is 850nm..

OM1, 220 meter
LRM 220m over OM1 multi-mode 10G rate SFP+ 1310nm (SFP-1000-LRM)

LRM 220m over OM1 multi-mode 10G rate SFP+ 1310nm

The SFP-1000-LRM is a 10G Base-LRM multi-mode 10G Ethernet rate SFP transceiver using 1310nm wavelength and reaching up to 220m distance over old type OM1 multi-mode fiber. Module is speciallt designed to be used on older 62.5/125um fiber plant.

www.robofiber.com

300meter / 984.3' (850nm) but dont say what MMF
Ubiquiti Unifi 10G Multi-Mode Optical Module (UACC-OM-MM-10G-D)

10G Multi-Mode Optical Module - Ubiquiti Store

SFP+ transceiver that supports 10G connections up to 300 m using multi-mode fiber with a duplex LC UPC connector.

store.ui.com

220m @ OM3 MMF, 300m over SMF
On Reddit someone said they run over 200 meter on FDDI fiber (Older then OM1) with this SFP module

https://www.fs.com/products/11590.html

https://www.reddit.com/r/networking/comments/h79m1h/fiber_gurus_can_i_get_10g_on_om1_to_about_1000ft

All 10Gbps FS modules
220 meter (850nm) and 300 meter (1310nm). But mentions OM3 and&or OM4

SFP+ Multimode 10G - 10/25/40/100G Module-Optische Transceiver - FS.com Deutschland

10/25/40/100G Module aus FS (Kostenlose und schnelle Lieferung, Tech-Support von Experten, Hervorragende Garantie).

www.fs.com

220 meter max over OM2
Multi-Vendor MSA Compatible 10G-SFP-220 SFP+ Module (10G-SFP-220)

Double Fiber 220 m SFP+ Optical Transceiver: 10G-SFP-220

10G-SFP-220 is Multi-Vendor MSA Compatible SFP+ Double Fiber Transceiver supporting 1.25-10.31 Gbps data rate in 220 m distance over Multi-Mode Fiber (MMF).

edgeoptic.com

ipolex - 10GB LRM - OM1, OM2, OM3 - 1310nm up to 220m

Amazon.com

iploex - 10Gbe SR - OM1, OM2, OM3, OM4 - 850nm 300m

Amazon.com

Mode conditioning patch cord
Information about these cables

220 meters over OM2 multimode fibre at 10Gbps - EDGE Optical Solutions

There are new and there are old fibre optic cable infrastructures. Some network operators have old type OM1/OM2 cables installed between sites.

edgeoptic.com

The cables

https://www.fs.com/products/11911.html

SM SC to MM ST 62.5/125μm Mode Conditioning Fiber Optic Patch Cable (PVC)

SM SC to MM ST 62.5/125μm Mode Conditioning Fiber Optic Patch Cable (PVC) Manufacturer, Affordable Factory Price & 5-Year Warranty.

www.optcore.net

62.5/125 OM1 Mode Conditioning Fiber Optic Patch Cable

 

[coxhaus]

62.5nm is a very old standard multi-mode fiber standard. They were switching to 50nm 35 years ago. I worked with a lot of fiber back then. They had long range and short range back then.

 

[Pello]

62.5nm is a very old standard multi-mode fiber standard. They were switching to 50nm 35 years ago. I worked with a lot of fiber back then. They had long range and short range back then.

As I have been reading most comments when people asked about OM1 the answer has been to replace it. But there are OM1 installations that would cost alot to replace, but instead of that they maybe can be upgraded from 100Mbps to 1 or even 10Gbps with new SFP modules, special patch cables, very clean fiber connections and some luck.

This is a comment at Reddit where a person was able to get 1Gbit over almost 2.5km (8200 feet) over 62.5/125. Upgraded it from 100FX to 1000-LX (SM) single mode optics on both ends and using normal 3ft orange LC to ST patches instead of mode conditioning patch cord. Running for 2 years. That must have been a perfect installation to be able to achieve that.

https://www.reddit.com/r/networking/comments/1d653wa/comment/l6s7nb8

Found good chart at Wikipedia about 1Gbps.

Gigabit Ethernet - Wikipedia

en.wikipedia.org

1000BASE‑SX - S = short wave length (860nm) - OM1 275m - OM2 550m - OM3 1km
1000BASE‑LX & 1000BASE‑LX10 - L = long wavelength (1310nm) - OM1, OM2, OM3 550m
1000BASE‑LSX (1310nm) - OM1 1km - OM2 2km (Typo on Wikipedia page where it is reversed.) - OM4 2km

So all these long distance (1km+) SFP modules for OM1 and OM2 I listed is 1000BASE‑LSX. Some of them is named 1000BASE-SX and 1310nm and that according to Wikipedia page is wrong. 1000Base-SX is 860nm. This explains why all of this is so confusing.

When coming to 10Gbps the same confusing names are also there if Wikipedia article is correct.

10 Gigabit Ethernet - Wikipedia

en.wikipedia.org

10GBASE-SR & 10GBASE-SW (850nm) - OM1 33m - OM2 83 meter - OM3 300m - OM4, 400m
10GBASE-LRM (1300nm) - OM2, OM3 220m

So with all the different names and specifications for the SFP modules, is the manufacturers a bit lazy then writing the product specifications?

Other comment about FDDI, OM1 and OM2 about 10Gbps and switches found on Wikipedia

Multi-mode optical fiber - Wikipedia

en.wikipedia.org

Older FDDI grade, OM1, and OM2 fiber can be used for 10 Gigabit Ethernet through 10GBASE-LRM. This requires the SFP+ interface to support electronic dispersion compensation (EDC) however, so not all switches, routers and other equipment can use these SFP+ modules.

Would still be nice with more stories of how long distance people have been able to get 1Gbps, 2.5Gbps and 10Gbit over old 62.5/125 OM1 fiber, and even older FDDI.

(As I have been trying to understand all this Im writing these posts with extra information so this thread will be picked up by search engines when others searching for anwsers)

 

[degrub]

Can't help you on the labeling and spec. part, but we were the alpha and beta tester for 62.5/125 fiber modems for an IBM token ring system that ran over 2 km in a chemical plant in the late 1980s ;-). 100Mbit was just fine for that system.

 

[coxhaus]

All the multi-mode I did back then was 1 gig. SX was for short distance and LX was for long distance. You needed the right one based on distance.
Somewhere along the line Cisco wanted me to switch to installing 50nm instead of 62.5nm. I only used Cisco equipment, mainly Cisco Catalyst 6500 switches for the core.

When I took over the small network team, we had a FDDI ring 100meg as our core for 4000 PCs. It was Cabletron equipment back then. I switched it out for Cisco Catalyst 6500 switch and a large Cisco 75xx router for communication lines.