FHD Fiber Cabling System
“
Specifications
- System: FHD Fiber Cabling System
- Components: Fiber Enclosures, Fiber Cassettes, Adapter Panels,
Cable Assemblies, Enclosure Accessories - Modes: Single Mode, Multimode
Product Usage Instructions
1. Overview of FS Fiber Cabling System
The FS FHD fiber optic cabling system is designed to provide
optimal maintainability and manageability for data centers. It
offers scalability to adapt to evolving business needs.
2. Benefits of the FHD System
The FHD series offers various benefits:
- Making Fiber Installation and MACs Work
Easier: The FHD system provides optimized space, versatile
solutions, integrated management, and time-saving plug-n-play
design. - Seamless Migration to Higher Data Rates:
Features bend insensitivity, low insertion loss, fire safety
rating, and high efficiency for future updates and changes. - Colored-Coded Components for Easy
Identification: Enables easy identification, compliance
with standards, aesthetics, orderliness, improved maintainability,
and reduced cabling errors.
3. Examples of Network Cabling
The FHD system components like Enclosures, Cassettes, Adapter
Panels, Trunks, Jumpers, Harnesses, and Patch Cords are used in
common data center cabling configurations:
- Interconnect: Establishes permanent links
between FHD Enclosures in switch/network cabinets and
server/storage cabinets. - Cross Connect: Installs permanent links
between FHD Enclosures in switch/network cabinets, server/storage
cabinets, and a common cross-connect cabinet or rack.
FAQ
Q: Can the FHD system be used in both single mode and multimode
configurations?
A: Yes, the FHD system supports both single mode and multimode
configurations for versatile applications.
Q: How many LC connections can the FHD panel or cassette
accommodate in a 1U enclosure?
A: The FHD panel or cassette can accommodate up to 144 LC
connections in a 1U FHD enclosure.
“`
FHD Fiber Cabling System Guide
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Page 1 of 18
Contents
1. FS Fiber Cabling System 1.1 Overview 1.2 Benefits 1.3 Examples of Network Cabling
2. FHD Series Components 2.1 FHD Fiber Enclosures 2.2 FHD Fiber Cassettes 2.3 FHD Adapter Panels 2.4 Cable Assemblies 2.5 Enclosure Accessories
3. Fiber Migration Configuration 3.1 Single Mode 3.2 Multimode
4. Technical Specification
FHD FIBER CABLING SYSTEM GUIDE
3 3 3 4 5 5 6 8 9 12 12 12 14 15
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FHD FIBER CABLING SYSTEM GUIDE
1. FS Fiber Cabling System
1.1 Overview
As the demand for high-density, high-performance, and continuously available fiber optic cabling in modern data centers surges, traditional fiber optic cabling systems are no longer adequate. These traditional systems are time-consuming to deploy, and more challenging to maintain, and making moves, adds, and changes (MAC) is more difficult. Additionally, conventional cabling systems consist of components designed for specific networks, which may result in a lack of flexibility and an inability to meet future needs.
FS FHD fiber optic cabling systems achieve these goals by offering optimal maintainability and manageability. Designed to enable data centers to perform MAC operations quickly and securely, the FHD system also provides scalability to increase density as business needs evolve.
1.2 Benefits
1.2.1 Making Fiber Installation and MACs Work Easier
FHD series is a versatile solution in multiple sizes and styles for building backbones, data centers, and enterprise applications.
Optimized Space
Versatile Solutions
The FHD panel or cassette allows up to 144F LC connections in the 1U FHD enclosure.
It offers a versatile modular solution for patching, terminating, and splicing applications.
Integrated Management
Cable management accessories or integrated structures enable flexible cabling during operation.
Saving Time
The plug-n-play design provides quick connection and deployment for network applications.
1.2.2 Seamless Migration to Higher Data Rates
MTP® cable, a cost-effective alternative to time-consuming field termination, is designed for high-density fiber patching in data centers that need space saving and reduce cable management troubles.
Bend Insensitive
Low Insertion Loss
Corning ClearCurve® and SMF-28® Ultra Fiber reduces optical loss in tight bends for slack storage and routing.
Fire Safety-Rated
Safe for use in plenum air spaces, as it can prevent flame propagation and smoke generation.
High-performance MT-based US Conec MTP® connector for data center and carrier-grade applications.
High Efficiency
Future updates, additions, and changes to the structured cabling are dramatically simplified.
1.2.3 Colored-Coded Components for Easy Identification
Color-coding is an integral part of our industry, as it helps to identify individual fibers, cable, and connectors.
Compliance with Standards
Aesthetics and Orderliness
Ensures color consistency with industry standards when used with other manufacturers’ products.
Creates an organized environment by color-coding components according to their functions.
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FHD FIBER CABLING SYSTEM GUIDE
Improved Maintainability
By maintaining a consistent standard, it simplifies the installation and connection of new equipment.
Reduced Cabling Errors
Prevents confusion and channel loss in data centers with multiple fiber mode cabling.
1.3 Examples of Network Cabling
The following sections illustrate how FHD Enclosures, Cassettes, Adapter Panels, Trunks, Jumpers, Harnesses, and Patch Cords are used in common data center cabling configurations.
1.3.1 Interconnect
In this configuration, a permanent link is installed between FHD Enclosures in the switch/network cabinet and the server or storage cabinets. The most common, flexible, and upgradeable FHD Fiber Cabling Solution is shown in Figure 1, below:
Figure 1: Interconnect
1.3.2 Cross Connect
In this configuration, permanent links are installed between FHD Enclosures in the switch/network cabinet and server or storage cabinets and a common cross-connect cabinet or rack. In this scenario, any fiber from any switch port or server uplink can be routed to anywhere within the data center. This option allows for easy moves, adds, or changes. The most common, flexible, and upgradeable FHD Fiber Cabling Solution is shown in Figure 2, below:
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FHD FIBER CABLING SYSTEM GUIDE
Figure 2: Cross Connect
2. FHD Series Components
FHD Enclosures
FHD Cassettes
FHD Adapter Panels
MTP®/MPO Fiber Cables
Patch Cables
Accessories
2.1 FHD Fiber Enclosures
Available in 1-RU, 2-RU, and 4-RU, supporting 144 fibers per rack unit, and can be reconfigured to accept 4port, 8-port, or 12-port, cassettes or adapter panels.
Provides a flexible and modular system for managing fiber connections and patching and makes cassettes or panels quickly snap in and pull out, making installation, moves, adds, and changes easier than ever. The detachable design, sliding drawer or tilt-down drawer provide multiple choices for your application.
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FHD FIBER CABLING SYSTEM GUIDE
Table 1. FHD Fiber Enclosures Configuration
Product
FHD-1UFMT-N FHD-1UFCE FHD-2UFCE FHD-4UFCE
FHD-1UCMP400 FHD-FPP5DRL FHD-1UFMT-S
RU
Compatibility Cassettes/Adapter panels
Type
1U
4
Fixed
1U
4
Sliding Drawer
2U
8
Sliding Drawer
4U
12
Sliding Drawer
1U
4
Fixed
1U
4
Fixed
1U
4
Sliding and Tilt-down Drawer
2.2 FHD Fiber Cassettes
Available in Base-8, Base-12, and Base-24 MTP® connectors’ MTP®-LC/Conversion/Mesh cassettes that are fully compatible with all FHD enclosures.
· 0.35dB Ultra Low-loss MTP® Connectors for Longer Link Distances · Offered in A Wide Range of Polarity Configurations (A/AF/U) · Interface Color-coding Makes It Easy to Identify Fiber Type · Snap-in Front Mount Allows for Easy Installation into Enclosures · For Main, Horizontal, and Equipment Distribution Areas in Data Center Cabling
Table 2. FHD MTP®-LC Universal Polarity Cassettes
Product
Fiber Type
FHD-1MTP4LCDOS2U
OS2
FHD-1MTP4LCDOM4U
OM4
FHD-1MTP6LCDOS2U
OS2
FHD-1MTP6LCDOM4U FHD-2MTP8LCDOM4U FHD-3MTP12LCOS2U
OM4 OM4 OS2
FHD-3MTP12LCOM4U
OM4
Note: Universal Polarity are used at both ends of a Method B Trunk
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Fiber Count
8F 8F 12F 12F 16F 24F 24F
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Table 3. FHD MTP®-LC A/AF Polarity Cassettes
Product
Fiber Type
FHD-1MTP6LCDOS2A
OS2
FHD-1MTP6LCDOS2AF
OS2
FHD-1MTP6LCDOM4A FHD-1MTP6LCDOM4AF
OM4 OM4
FHD-2MTP12LCDOS2A
OS2
FHD-2MTP12LCDOS2AF FHD-2MTP12LCDOM4A
OS2 OM4
FHD-2MTP12LCDOM4AF
OM4
FHD-1MTP12LCDOS2A FHD-1MTP12LCDOS2AF FHD-1MTP12LCDOM4A
OS2 OS2 OM4
FHD-1MTP12LCDOM4AF FHD-3MTP18LCDOS2A FHD-3MTP18LCDOS2AF
OM4 OS2 OS2
FHD-3MTP18LCDOM4A
OM4
FHD-3MTP18LCDOM4AF
OM4
Note: Type A and AF are used as a pair in a two cassette Method A link
Table 4. FHD MTP® Conversion & Mesh Cassettes
Product
Modular Type
FHD-2MTP3MTP8OS2 FHD-2MTP3MTP8OM5 FHD-2MTP3MTP8OM4 FHD-4MTP6MTP8OM4 FHD-1MTP3MTP8OS2 FHD-1MTP3MTP8OM4 FHD-8MTPMESHOS2
2 x 12F MTP® to 3 x 8F MTP® 2 x 12F MTP® to 3 x 8F MTP® 2 x 12F MTP® to 3 x 8F MTP® 4 x 12F MTP® to 6 x 8F MTP® 1 x 24F MTP® to 3 x 8F MTP® 1 x 24F MTP® to 3 x 8F MTP®
8 x 8F MTP® to 8 x 8F MTP
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FHD FIBER CABLING SYSTEM GUIDE
Fiber Count
12F 12F 12F 12F 24F 24F 24F 24F 24F 24F 24F 24F 36F 36F 36F 36F
Fiber Type
OS2 OM5 OM4 OM4 OS2 OM4 OS2
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FHD FIBER CABLING SYSTEM GUIDE
Table 4. FHD MTP® Conversion&Mesh Cassettes
Product
Modular Type
Fiber Type
FHD-8MTPMESHOM4 FHD-4MTPMESHOS2 FHD-4MTPMESHOM4
8 x 8F MTP® to 8 x 8F MTP 4 x 8F MTP® to 4 x 8F MTP® 4 x 8F MTP® to 4 x 8F MTP®
OM4 OS2 OM4
2.3 FHD Adapter Panels
Available in LC/SC/ST/MDC/MTP® Connectors for employing a fiber infrastructure as you migrate to higher network speeds, panels are fully compatible with all FHD enclosures.
· Interface Color-coding Makes It Easy to Identify Fiber Type · Clear Numbering for Quick Fiber Identification · Tool-less Snap Installation for Easier MACs
Table 5. FHD LC Adapter Panels Product
FHD-FAP12LCDXSMF FHD-FAP12LCADZSMF
FHD-FAP12LCDOM5 FHD-FAP12LCDX10GMM
FHD-FAP18LCDXSMF FHD-FAP18LCDXMMF
Fiber Type
OS2/UPC OS2/APC
OM5 OM4 OS2/UPC OM4
Fiber Count
24F 24F 24F 24F 36F 36F
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FHD FIBER CABLING SYSTEM GUIDE
Table 6. FHD MTP® Adapter Panels
Product
FHD-FAP8MTPHB FHD-FAP12MTPHA
Number of Ports
8 12
Key Orientation
Up-Up Up-Down
2.4 Cable Assemblies
Available with Patch Cords/Jumper/Trunk/Harness in various jackets and fiber types to meet any application designed to interconnect or cross-connect fiber networks within structured cabling systems.
· Color-coded Connector Boots/Cable Jacket for Easy Identification · Custom Polarities and Pins Available · Cable Jacket Available in Riser, OFNP, and LSZH Flame Rating · Optical Performance Test for Normal Network Connections
Table 7. LC/UPC Duplex Pre-terminated Patch Cords
Product
SMLCDX OM5LCDX OM4LCDX OM3LCDX SMXXDX OM5XXDX OM4XXDX OM3XXDX HD-SMFULCDX HD-OM4FULCDX HD-SMXXULCDX HD-OM4XXULCDX HD-OM3XXULCDX
Fiber Type
OS2 OM5 OM4 OM3 OS2 OM5 OM4 OM3 OS2 OM4 OS2 OM4 OM3
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Product Classification
Fiber Patch Cables Fiber Patch Cables Fiber Patch Cables Fiber Patch Cables
Customized Customized Customized Customized Flat Clip Uniboot Flat Clip Uniboot Customized Customized Customized
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Table 8. MTP® Jumpers Product
8FMTPOM4 8FMTPOM4 8FMTPOM3 8FMTPOM3 12FMTPSMF 12FMTPSMF 12FMTPOM5 12FMTPOM5 12FMTPOM4 12FMTPOM4 12FMTPOM3 12FMTPOM3 16FMTPSMF 16FMTPOM4 24FMTPSMF 24FMTPOM5 24FMTPOM4
Table 9. MTP®/MPO Trunks
Product
8FMTPSMF 8FMTPOM4 12FMTPSMF 12FMTPOM4 12FMTPOM3 16FMTPSMF
Fiber Type
OM4 OM4 OM3 OM3 OS2 OS2 OM5 OM5 OM4 OM4 OM3 OM3 OS2 OM4 OS2 OM5 OM4
Fiber Type
OS2 OM4 OS2 OM4 OM3 OS2
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FHD FIBER CABLING SYSTEM GUIDE
Fiber Count
8F 8F 8F 8F 12F 12F 12F 12F 12F 12F 12F 12F 16F 16F 24F 24F 24F
Fiber Count
8F 8F 12F 12F 12F 16F
Polarity Type
Type A Type B Type A Type B Type A Type B Type A Type B Type A Type B Type A Type B Type B Type B Type A Type A Type A
Polarity Type
Type A Type A Type A Type A Type A Type A
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Table 9. MTP®/MPO Trunks Product
16FMTPOM4 24FMTPSMF 24FMTPOM4 24FMTPOM3 32FMTPSMF 32FMTPOM4 36FMTPSMF 36FMTPOM4 36FMTPOM3 48FMTPSMF HD-48FMTPLCSMF 48FMTPOM4 48FMTPOM4/HD-48FMTPLCOM4 48FMTPOM3 48FMTPOM3/48FMTPLCOM3 72FMTPOM4
Fiber Type
OM4 OS2 OM4 OM3 OS2 OM4 OS2 OM4 OM3 OS2 OS2 OM4 OM4 OM3 OM3 OM4
Table 10. MTP® Harness Product
8FMTPLCSMF 8FMTPLCOM4 16FMTPLCSMF 16FMTPLCOM4
Fiber Type
OS2 OM4 OS2 OM4
FHD FIBER CABLING SYSTEM GUIDE
Fiber Count
16F 24F 24F 24F 32F 32F 36F 36F 36F 48F 48F 48F 48F 48F 48F 72F
Polarity Type
Type A Type A Type A Type A Type A Type A Type A Type A Type A Type A Type B Type A Type B Type A Type B Type B
Fiber Count
OS2 OM4 OS2 OM4
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FHD FIBER CABLING SYSTEM GUIDE
2.5 Enclosure Accessories
Available in blanking adapter panel, modular panel, splice tray, and fiber slack management spool.
· Blank Fiber Adapter Panel Compatible with All FHD Series Fiber Enclosures · Modular Panel Hybrid Solution for Mixing Fiber and Copper Cabling · Splice Tray Stack 4 High, Up to 144 fibers in 1U FHD Enclosure · Management Spool Effectively Manage and Organize Excess Fiber Cable Slack
Table 11. Enclosure Accessories Product
FHD-FAPB FHD-FAPM6 FHD-FOSMF-24F FHD-FOSMF-36F
FHD-FMS
Description
Blanking Fiber Adapter Panel for FHD Fiber Enclosure 6-Port Multimedia Copper/Fiber Modular Panel with 6 x Plastic Clips Fiber Optical Splice Tray 24 Fusion for FHD Rack Mount Fiber Enclosure Fiber Optical Splice Tray 36 Fusion for FHD Rack Mount Fiber Enclosure
Fiber Slack Management Spool for FHD Fiber Enclosure
3. Fiber Migration Configuration
FHD Cabling System makes 10G to 40G to 100G to 200G to 400G to 800G migration easy. FS recommends using Method B polarity for single mode or multimode parallel fiber solutions. Method B (Key-Up to Key-Up array connectivity) is widely used throughout the industry and is discussed in TIA-568-C.1, it streamlines network deployment ensures consistent polarity, and reduces the complexity of a fiber network.
To assist with the array of polarity and gender, FS is offering the MTP® PRO, which is a gender/polarity changeable MTP® connector. MTP® PRO will allow for either male/female gender or Key-Up/Key-Down or Key-Up/Key-Up MTP® trunk configurations. At the same time, FS supports the customization of various types of connectors to meet your diverse needs.
3.1 Single Mode
For 1, 10, 25, 40, 50, 100, 200, 400 Gbps Configurations
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· 12-fiber MTP backbone · Provides duplex (2 fibers) connectors for equipment · Universal polarity cassettes allow for the same interchangeable cassette on both ends of a Method B trunk in a fiber channel
For 40, 100, 400, 800 Gbps Configurations
· 12-fiber MPO backbone stays in place · Swap out MTP-LC cassettes for MTP-MTP conversion cassettes · Provides Parallel (8-fiber) connections to equipment · Universal polarity cassettes allow for the same interchangeable cassette on both ends of a Method B trunk in a fiber channel
For 40, 100, 400, 800 Gbps Configurations
· 12-fiber MTP Backbone stays in place · Swap out MTP-LC/MTP-MTP cassettes with MTP pass-thru adapter panels · Provides Parallel 12-fiber connections to equipment
FHD FIBER CABLING SYSTEM GUIDE
Supports the following modules: · SFP28 25GBASE-ER/-LR-S · QSFP+ 40GBASE-LR4/-ZR4 · QSFP28 50GBASE-ZR2 · QSFP28 100GBASE-ZR4/-ER/-FR/-LR/ LR4/CWDM4 · SFPDD 100GBASE-DR/-FR/-LR · QSFP56 200GBASE-LR4/-FR4 · QSFP-DD 400GBASE-FR4/-LR4/-ER4/LR4L/-LR8
Supports the following modules: · QSFP28 100GBASE-PSM4-S/-PLR4L/PLR4 · QSFP-DD 400GBASE-XDR4/-DR4/-FR, QDD-4X100G-LR · QSFP112 400GBASE-DR4/-XDR4 · OSFP 400GBASE-DR4 · OSFP 800GBASE-DR8/-PLR8/-XDR8
Supports the following modules: · QSFP28 100GBASE-PSM4-S/-PLR4L/PLR4 · QSFP-DD 400GBASE-XDR4/-DR4/-FR, QDD-4X100G-LR · QSFP112 400GBASE-DR4/-XDR4 · OSFP 400GBASE-DR4 · OSFP 800GBASE-DR8/-PLR8/-XDR8
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3.2 Multimode
For 10, 25, 40, 50, 100 Gbps Configurations
· 12-fiber MTP backbone · Provides duplex (2 fibers) connectors for equipment · Universal polarity cassettes allow for the same interchangeable cassette on both ends of a Method B trunk in a fiber channel For 40, 100, 200, 400 Gbps Configurations
· 12-fiber MTP backbone stays in place · Swap out MTP-LC cassettes for MTP-MTP conversion cassettes · Provides Parallel (8-fiber) connections to equipment · Universal polarity cassettes allow for the same interchangeable cassette on both ends of a Method B trunk in a fiber channel
For 40, 100, 200, 400 Gbps Configurations
· 12-fiber MTP backbone stays in place · Swap out MTP-LC/MTP-MTP cassettes with MTP pass-thru adapter panels · Provides Parallel 12-fiber connections to equipment
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FHD FIBER CABLING SYSTEM GUIDE
Supports the following modules: · SFP28 25GBASE-SR/-CSR · SFP56 50GBASE-SR · QSFP28 40/100GBASE-SM4 · QSFP+ 40GBASE-SR/-SR Bi-Di
Supports the following modules: · QSFP28 100GBASE-SR4/-ESR4/SL4 · QSFP28 100/112GBASE-SR4 · QSFP56 200GBASE-SR4 · QSFP-DD 400GBASE-SR4.2/-SR4 · QSFP112 400GBASE-SR4
Supports the following modules: · QSFP28 100GBASE-SR4/-ESR4/SL4 · QSFP28 100/112GBASE-SR4 · QSFP56 200GBASE-SR4 · QSFP-DD 400GBASE-SR4.2/-SR4 · QSFP112 400GBASE-SR4
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FHD FIBER CABLING SYSTEM GUIDE
4. Technical Specifications
Table 12. Fiber Attenuation and Bandwidth Performance Metrics
Fiber Type
Core Diameter
Attenuation (dB/km)
Minimum Effective Modal
Bandwidth (MHz·km)
Wavelength (nm)
850 1300
1310
1550
850
953
OM3
50m
3.0
1.0
/
/
2000
/
OM4
50m
3.0
1.0
/
/
2000
/
OM5
50m
3.0
1.0
/
/
4700
2470
OS2
9m
/
/
0.36
0.22
/
/
Minimum Overfilled Launch Bandwidth
(MHZ·km)
850
953
1300
1500
/
500
3500
/
500
3500
1850
500
/
/
/
Table 13. Ethernet Speeds and Fiber Transmission Standards
Gigabit Ethernet
2G 10G 40G
100G
Ethernet Standard
1000BASE-SX 1000BASE-LX 10GBASE-SR 10GBASE-LR 40GBASE-SR4 40GBASE-SR 40GBASE-SM4 40GBASE-LR4 40GBASE-ZR4 100GBASE-SR4 100GBASE-SL4 100GBASE-ESR4 100GBASE-SWDM4 100GBASE-CWDM4 100GBASE-DR 100GBASE-LR4
Fiber Type
OM3/OM4 OS2
OM3/OM4 OS2
OM3/OM4 OM3/OM4 OM3/OM4
OS2 OS2 OM3/OM4 OM3/OM4 OM3/OM4 OM5 OS2 OS2 OS2
Maximum Channel Length
550m 10km 300m/400m 10km 100m/150m 150m 100m 10km 80km 70m/100m 100m 300m 150m 2km 500m 10km
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Page 15 of 18
Gigabit Ethernet
100G 200G
400G 800G
Ethernet Standard
100GBASE-FR 100GBASE-ER 100GBASE-ZR4 200GBASE-SR4 200GBASE-2SR4 200GBASE-FR4 200GBASE-LR4 400GBASE-SR4 400GBASE-SR4.2 400GBASE-DR4 400GBASE-FR4 400GBASE-XDR4 400GBASE-LR8 800GBASE-DR8 800GBASE-PLR8 800GBASE-XDR8
FHD FIBER CABLING SYSTEM GUIDE
Fiber Type
OS2 OS2 OS2 OM3/OM4 OM3/OM4 OS2 OS2 OS2 OS2 OS2 OS2 OS2 OS2 OS2 OS2 OS2
Maximum Channel Length
25km 40km 80km 70m/100m 100m
2km 10km 70m/100m 70m/100m 500m 2km 10km 10km 500m 2km 10km
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Table 14. Fiber Channel Speeds and Transmission Media Standards
Fiber Channel Data Rate
Medium Standard
Fiber Type
200-M5E-SN-I
OM3
2G
200-SM-LL-I
OS2
200-SM-LC-L
OS2
400-M5E-SN-I
OM3
400-M5F-SN-I
OM4
4G
400-SM-LL-I
OS2
400-SM-LC-M
OS2
400-SM-LC-L
OS2
800-M5E-SN-I
OM3
800-M5F-SN-I
OM4
8G
800-SM-LC-I
OS2
800-SM-LC-L
OS2
1600-M5E-SN-I
OM3
1600-M5F-SN-I
OM4
16G
1600-SM-LZ-I
OS2
1600-SM-LC-L
OS2
3200-M5F–SN-I
OM4
32G
3200-SM-LC-L
OS2
FHD FIBER CABLING SYSTEM GUIDE
Channel Length
0.5m-500m 2m-2km 2m-10km
0.5m-380m 0.5m-400m
2m-2km 2m-4km 2m-10km 0.5m-150m 0.5m-190m 2m-1.4km 2m-10km 0.5m-100m 0.5m-125m 0.5m-2km 0.5m-10km 0.5m-100m 0.5m-10km
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FHD FIBER CABLING SYSTEM GUIDE
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Documents / Resources
![]() |
FS FHD Fiber Cabling System [pdf] User Guide FHD Fiber Enclosures, FHD Fiber Cassettes, FHD Adapter Panels, FHD Fiber Cabling System, Fiber Cabling System, Cabling System |