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  5. Fiber Splice Closures

To tackle the variety of challenges service operators face when deploying fiber, CommScope has created a family of fiber optic splice closures that balance key criteria such as reliability, installability, flexibility and speed of deployment.

To choose the right fiber splicing closure , you must determine which solution best suits your needs in the specific part of the network:

  • Trunk and feeder network solutions
  • Feeder and distribution network solutions
  • Distribution and drop network solutions

For example, as you move closer to the customer, frequent re-entry access is essential—whereas, in the trunk network, a fit-and-forget solution is often the preferred option. By knowing where in the outside plant FTTx network you’re building, finding an easy-to-deploy and long-lasting closure becomes effortless with CommScope’s proven (yet future focused) fiber closure family.

With over 30 years of experience offering advanced network solutions—including our revolutionary gel sealing technology—CommScope can help your network realize its full potential today and tomorrow.

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529391-000 | FOSC400-A4-12-1-NNV 529391-000 | FOSC400-A4-12-1-NNV
Variant of FOSC-400
FOSC® 400 A4 Fiber Optic Splice Closure, Heat Shrink Cable sealing, one pre-installed 12-splice tray, with test valve
529391-000 | FOSC400-A4-12-1-NNV
  • Regional Availability: Latin America | North America
  • Product Brand: FOSC®
  • Product Series: FOSC 400
  • Product Type: Single-ended | round fiber closure
  • Cable Ports Quantity, total: 1 oval port (2 cables) + 4 round ports
  • Cable Sealing Type: Heat shrink
  • Closure Sealing Type: Dome-to-base clamp with O-ring
  • Closure Style: Single-ended
  • Flash Test Valve: Pre-installed
  • Splicing Type, Supported: Single fusion
  • Main Cable Diameter, maximum: 25 mm | 0.984 in
  • Splicing Capacity, Single Fusion...: 48
SpecificationsSpecs
529391-000 | FOSC400-A4-12-1-NNV
  • Product Brand: FOSC®
  • Product Series: FOSC 400
  • Product Type: Single-ended | round fiber closure
  • Cable Ports Quantity, total: 1 oval port (2 cables) + 4 round ports
  • Cable Sealing Type: Heat shrink
  • Closure Sealing Type: Dome-to-base clamp with O-ring
  • Closure Style: Single-ended
  • Flash Test Valve: Pre-installed
  • Splicing Type, Supported: Single fusion
  • Main Cable Diameter, maximum: 25 mm | 0.984 in
  • Splicing Capacity, Single Fusion...: 48
  • Regional Availability: Latin America | North America
530086-000 | FOSC600-D-BASKET 530086-000 | FOSC600-D-BASKET
Variant of FOSC600-CLOS-ACC
FOSC® 600 D Fiber Optic slack storage basket kit
530086-000 | FOSC600-D-BASKET
  • Regional Availability: North America
  • Product Brand: FOSC®
  • Product Type: Slack basket
  • Product Series: FOSC 600
SpecificationsSpecs
530086-000 | FOSC600-D-BASKET
  • Product Brand: FOSC®
  • Product Type: Slack basket
  • Product Series: FOSC 600
  • Regional Availability: North America
531296-000 | FOSC600-C8B-NT-0-C4V 531296-000 | FOSC600-C8B-NT-0-C4V
Variant of FOSC-600
FOSC® 600 C Fiber Optic Splice Closure, Gel Cable sealing, butt type, no pre-installed trays, two 4-port gel blocks, standard basket, 4 ground feedthru lugs, with test valve
531296-000 | FOSC600-C8B-NT-0-C4V
  • Regional Availability: Latin America | North America
  • Product Brand: FOSC®
  • Product Series: FOSC 600
  • Product Type: In-line | rectangular fiber closure | Single-ended | rectangular fiber closure
  • Cable Ports Quantity, total: 4 multi-out ports (16 cables)
  • Cable Sealing Type: Compressed gel
  • Closure Sealing Type: Captured bolts | Over-centered latches with rubber gasket
  • Closure Style: In-line | Single-ended
  • Flash Test Valve: Pre-installed
  • Splicing Type, Supported: Mass fusion | Single fusion
  • Main Cable Diameter, maximum: 35 mm | 1.378 in
  • Splicing Capacity, Single Fusion...: 480
  • Splicing Capacity, Mass Fusion, ...: 864
SpecificationsSpecs
531296-000 | FOSC600-C8B-NT-0-C4V
  • Product Brand: FOSC®
  • Product Series: FOSC 600
  • Product Type: In-line | rectangular fiber closure | Single-ended | rectangular fiber closure
  • Cable Ports Quantity, total: 4 multi-out ports (16 cables)
  • Cable Sealing Type: Compressed gel
  • Closure Sealing Type: Captured bolts | Over-centered latches with rubber gasket
  • Closure Style: In-line | Single-ended
  • Flash Test Valve: Pre-installed
  • Splicing Type, Supported: Mass fusion | Single fusion
  • Main Cable Diameter, maximum: 35 mm | 1.378 in
  • Splicing Capacity, Single Fusion...: 480
  • Splicing Capacity, Mass Fusion, ...: 864
  • Regional Availability: Latin America | North America
53365T-000 | FOSC-ACC-GRND-BRAID-COMN 53365T-000 | FOSC-ACC-GRND-BRAID-COMN
Variant of FOSC450-CLOS-ACC
FOSC® Bonding braid kit for FOSC closures
53365T-000 | FOSC-ACC-GRND-BRAID-COMN
  • Regional Availability: North America
  • Product Brand: FOSC®
  • Product Type: Grounding kit
  • Product Series: FOSC 400 | FOSC 450
SpecificationsSpecs
53365T-000 | FOSC-ACC-GRND-BRAID-COMN
  • Product Brand: FOSC®
  • Product Type: Grounding kit
  • Product Series: FOSC 400 | FOSC 450
  • Regional Availability: North America
536279-000 | FOSC400-B4-NT-0-BNV 536279-000 | FOSC400-B4-NT-0-BNV
Variant of FOSC-400
FOSC® 400 B4 Fiber Optic Splice Closure, Heat Shrink Cable sealing, no pre-installed trays, cable blocking, with test valve
536279-000 | FOSC400-B4-NT-0-BNV
  • Regional Availability: Latin America | North America
  • Product Brand: FOSC®
  • Product Series: FOSC 400
  • Product Type: Single-ended | round fiber closure
  • Cable Ports Quantity, total: 1 oval port (2 cables) + 4 round ports
  • Cable Sealing Type: Heat shrink
  • Closure Sealing Type: Dome-to-base clamp with O-ring
  • Closure Style: Single-ended
  • Flash Test Valve: Pre-installed
  • Splicing Type, Supported: Single fusion
  • Main Cable Diameter, maximum: 25 mm | 0.984 in
  • Splicing Capacity, Single Fusion...: 96
  • Splicing Capacity, Mass Fusion, ...: 144
SpecificationsSpecs
536279-000 | FOSC400-B4-NT-0-BNV
  • Product Brand: FOSC®
  • Product Series: FOSC 400
  • Product Type: Single-ended | round fiber closure
  • Cable Ports Quantity, total: 1 oval port (2 cables) + 4 round ports
  • Cable Sealing Type: Heat shrink
  • Closure Sealing Type: Dome-to-base clamp with O-ring
  • Closure Style: Single-ended
  • Flash Test Valve: Pre-installed
  • Splicing Type, Supported: Single fusion
  • Main Cable Diameter, maximum: 25 mm | 0.984 in
  • Splicing Capacity, Single Fusion...: 96
  • Splicing Capacity, Mass Fusion, ...: 144
  • Regional Availability: Latin America | North America
536788-000 | FIST-SOSA2-4SE-S 536788-000 | FIST-SOSA2-4SE-S
Variant of FIST-SPLICE-TRAYS
FIST® Splice Sub-assembly kit with 4 trays, each for holding up to 12 primary or 4 secondary coated fibers, with Heat Shrink type splice holder
536788-000 | FIST-SOSA2-4SE-S
  • Regional Availability: EMEA
  • Product Brand: FIST®
  • Product Series: FIST-SOSA2
  • Product Type: Fiber splice tray
  • Splice Tray Chip Type: Heat shrink
  • Splice Tray Construction: SE (for up to 12 primary or 4 secondary coated fibers)
SpecificationsSpecs
536788-000 | FIST-SOSA2-4SE-S
  • Product Brand: FIST®
  • Product Series: FIST-SOSA2
  • Product Type: Fiber splice tray
  • Splice Tray Chip Type: Heat shrink
  • Splice Tray Construction: SE (for up to 12 primary or 4 secondary coated fibers)
  • Regional Availability: EMEA
539096-000 | FIST-GCO2-BC16-GV 539096-000 | FIST-GCO2-BC16-GV
Variant of FIST-GCO2-B
FIST® GC02 Fiber Optic Splice Closure, Heat Shrink or Gold Gel Cable sealing, size BC, no pre-installed fiber trays, 16 round ports + 1 oval port with grounding, with test valve
539096-000 | FIST-GCO2-BC16-GV
  • Regional Availability: EMEA
  • Product Brand: FIST®
  • Product Series: FIST-GCO2
  • Product Type: Single-ended | round fiber closure
  • Cable Ports Quantity, total: 1 oval port (2 cables) + 16 round ports
  • Cable Sealing Type: Gel kit (optional) | Heat shrink
  • Closure Sealing Type: Dome-to-base clamp with O-ring
  • Closure Style: Single-ended
  • Flash Test Valve: Pre-installed
  • Main Cable Diameter, maximum: 25 mm | 0.984 in
  • Splicing Capacity, Single Fusion...: 672
  • Splicing Capacity, Mass Fusion, ...: 1008
SpecificationsSpecs
539096-000 | FIST-GCO2-BC16-GV
  • Product Brand: FIST®
  • Product Series: FIST-GCO2
  • Product Type: Single-ended | round fiber closure
  • Cable Ports Quantity, total: 1 oval port (2 cables) + 16 round ports
  • Cable Sealing Type: Gel kit (optional) | Heat shrink
  • Closure Sealing Type: Dome-to-base clamp with O-ring
  • Closure Style: Single-ended
  • Flash Test Valve: Pre-installed
  • Main Cable Diameter, maximum: 25 mm | 0.984 in
  • Splicing Capacity, Single Fusion...: 672
  • Splicing Capacity, Mass Fusion, ...: 1008
  • Regional Availability: EMEA
539265-000 | FOSC400-A4-24-1-NNN 539265-000 | FOSC400-A4-24-1-NNN
Variant of FOSC-400
FOSC® 400 A4 Fiber Optic Splice Closure, Heat Shrink Cable sealing, one pre-installed 24-splice tray
539265-000 | FOSC400-A4-24-1-NNN
  • Regional Availability: Latin America | North America
  • Product Brand: FOSC®
  • Product Series: FOSC 400
  • Product Type: Single-ended | round fiber closure
  • Cable Ports Quantity, total: 1 oval port (2 cables) + 4 round ports
  • Cable Sealing Type: Heat shrink
  • Closure Sealing Type: Dome-to-base clamp with O-ring
  • Closure Style: Single-ended
  • Flash Test Valve: None
  • Splicing Type, Supported: Single fusion
  • Main Cable Diameter, maximum: 25 mm | 0.984 in
  • Splicing Capacity, Single Fusion...: 48
SpecificationsSpecs
539265-000 | FOSC400-A4-24-1-NNN
  • Product Brand: FOSC®
  • Product Series: FOSC 400
  • Product Type: Single-ended | round fiber closure
  • Cable Ports Quantity, total: 1 oval port (2 cables) + 4 round ports
  • Cable Sealing Type: Heat shrink
  • Closure Sealing Type: Dome-to-base clamp with O-ring
  • Closure Style: Single-ended
  • Flash Test Valve: None
  • Splicing Type, Supported: Single fusion
  • Main Cable Diameter, maximum: 25 mm | 0.984 in
  • Splicing Capacity, Single Fusion...: 48
  • Regional Availability: Latin America | North America
539662-000 | FIST-GCO2-BE16-GN 539662-000 | FIST-GCO2-BE16-GN
Variant of FIST-GCO2-B
FIST® GC02 Fiber Optic Splice Closure, Heat Shrink or Gold Gel Cable sealing, size BE, no pre-installed fiber trays, 16 round ports + 1 oval port
539662-000 | FIST-GCO2-BE16-GN
  • Regional Availability: EMEA
  • Product Brand: FIST®
  • Product Series: FIST-GCO2
  • Product Type: Single-ended | round fiber closure
  • Cable Ports Quantity, total: 1 oval port (2 cables) + 16 round ports
  • Cable Sealing Type: Gel kit (optional) | Heat shrink
  • Closure Sealing Type: Dome-to-base clamp with O-ring
  • Closure Style: Single-ended
  • Flash Test Valve: None
  • Splicing Type, Supported: Mass fusion | Single fusion
  • Main Cable Diameter, maximum: 25 mm | 0.984 in
  • Splicing Capacity, Single Fusion...: 1344
  • Splicing Capacity, Mass Fusion, ...: 1728
SpecificationsSpecs
539662-000 | FIST-GCO2-BE16-GN
  • Product Brand: FIST®
  • Product Series: FIST-GCO2
  • Product Type: Single-ended | round fiber closure
  • Cable Ports Quantity, total: 1 oval port (2 cables) + 16 round ports
  • Cable Sealing Type: Gel kit (optional) | Heat shrink
  • Closure Sealing Type: Dome-to-base clamp with O-ring
  • Closure Style: Single-ended
  • Flash Test Valve: None
  • Splicing Type, Supported: Mass fusion | Single fusion
  • Main Cable Diameter, maximum: 25 mm | 0.984 in
  • Splicing Capacity, Single Fusion...: 1344
  • Splicing Capacity, Mass Fusion, ...: 1728
  • Regional Availability: EMEA
547413-000 | FOSC400-B2-12-2-BGV-UTIL 547413-000 | FOSC400-B2-12-2-BGV-UTIL
Variant of FOSC-400
FOSC® 400 B2 Fiber Optic Splice Closure, Heat Shrink Cable sealing, two pre-installed 12-splice trays, with test valve
547413-000 | FOSC400-B2-12-2-BGV-UTIL
  • Regional Availability: Latin America | North America
  • Product Brand: FOSC®
  • Product Series: FOSC 400
  • Product Type: Single-ended | round fiber closure
  • Cable Ports Quantity, total: 1 oval port (2 cables) + 2 round ports
  • Cable Sealing Type: Heat shrink
  • Closure Sealing Type: Dome-to-base clamp with O-ring
  • Closure Style: Single-ended
  • Flash Test Valve: Pre-installed
  • Splicing Type, Supported: Single fusion
  • Main Cable Diameter, maximum: 25 mm | 0.984 in
  • Splicing Capacity, Single Fusion...: 96
  • Splicing Capacity, Mass Fusion, ...: 144
SpecificationsSpecs
547413-000 | FOSC400-B2-12-2-BGV-UTIL
  • Product Brand: FOSC®
  • Product Series: FOSC 400
  • Product Type: Single-ended | round fiber closure
  • Cable Ports Quantity, total: 1 oval port (2 cables) + 2 round ports
  • Cable Sealing Type: Heat shrink
  • Closure Sealing Type: Dome-to-base clamp with O-ring
  • Closure Style: Single-ended
  • Flash Test Valve: Pre-installed
  • Splicing Type, Supported: Single fusion
  • Main Cable Diameter, maximum: 25 mm | 0.984 in
  • Splicing Capacity, Single Fusion...: 96
  • Splicing Capacity, Mass Fusion, ...: 144
  • Regional Availability: Latin America | North America
55643Q-000 | FOSC400-D5-R2-2-NGV-A 55643Q-000 | FOSC400-D5-R2-2-NGV-A
Variant of FOSC-400
FOSC® 400 D5 Fiber Optic Splice Closure, Heat Shrink Cable sealing, two pre-installed Ribbon trays,with test valve
55643Q-000 | FOSC400-D5-R2-2-NGV-A
  • Regional Availability: Latin America | North America
  • Product Brand: FOSC®
  • Product Series: FOSC 400
  • Product Type: Single-ended | round fiber closure
  • Cable Ports Quantity, total: 1 oval port (2 cables) + 5 round ports
  • Cable Sealing Type: Heat shrink
  • Closure Sealing Type: Dome-to-base clamp with O-ring
  • Closure Style: Single-ended
  • Flash Test Valve: Pre-installed
  • Splicing Type, Supported: Mass fusion | Single fusion
  • Main Cable Diameter, maximum: 25 mm | 0.984 in
  • Splicing Capacity, Single Fusion...: 576
  • Splicing Capacity, Mass Fusion, ...: 1152
SpecificationsSpecs
55643Q-000 | FOSC400-D5-R2-2-NGV-A
  • Product Brand: FOSC®
  • Product Series: FOSC 400
  • Product Type: Single-ended | round fiber closure
  • Cable Ports Quantity, total: 1 oval port (2 cables) + 5 round ports
  • Cable Sealing Type: Heat shrink
  • Closure Sealing Type: Dome-to-base clamp with O-ring
  • Closure Style: Single-ended
  • Flash Test Valve: Pre-installed
  • Splicing Type, Supported: Mass fusion | Single fusion
  • Main Cable Diameter, maximum: 25 mm | 0.984 in
  • Splicing Capacity, Single Fusion...: 576
  • Splicing Capacity, Mass Fusion, ...: 1152
  • Regional Availability: Latin America | North America
558850-000 | FOSC450-CABLE-TERM-4-N 558850-000 | FOSC450-CABLE-TERM-4-N
Variant of FOSC450-CLOS-ACC
FOSC® 450 Cable Termination for Fiber Optic Splice Closure, B/C/D closures, 4 sets ea.: cbl retent. H/W, hose clamps; strength member
558850-000 | FOSC450-CABLE-TERM-4-N
  • Regional Availability: North America
  • Product Brand: FOSC®
  • Product Type: Cable termination kit
  • Product Series: FOSC 450
SpecificationsSpecs
558850-000 | FOSC450-CABLE-TERM-4-N
  • Product Brand: FOSC®
  • Product Type: Cable termination kit
  • Product Series: FOSC 450
  • Regional Availability: North America
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  • Ordering Guide: FOSC 450 Fiber Optic Splice Closures

    FOSC 450 Fiber Optic Splice Closure Ordering Guide provides the information you need to specify and buy FOSC 450 splice closures and accessories for your fiber network.
    Download

  • At-A-Glance: Fiber Splice Closure - Spanish

    Fiber splice closures specifications and comparison and applications.
    Download

  • At-A-Glance: Fiber Splice Closure

    Fiber splice closures specifications and comparison and applications.
    Download

  • Brochure: FTTH Façade Solution

    The ideal solution for situations where underground installations are cost-prohibitive and pleasing aesthetics are important.
    Download

  • Ordering Guide: FOSC Modular Closure

    Download

  • Ordering Guide: FIST Modular Splice Closure

    The new FIST sleeve offers flexibility and efficiency and supports a variety of applications with simplified planning and logistics and intuitive assembly.
    Download

Filters

August 30, 2021

Press

CommScope Announces General Availability of Modular Fiber Optic Splice Closure for Operators

CommScope announced today the general availability of its Fiber Optic Splice Closure (FOSC) modular solution. This dome splice closure builds on FOSC’s legacy of innovation and protection for billi...

March 12, 2019

Press

Innovation for Billions of Connections

As governments around the world invigorate broadband with investment in digital infrastructure, the number of 5G connections is expected to exceed one billion by 2025. The next few years are critic...

December 11, 2018

Blog

Ice is Only Nice in a Drink

Connectivity outages happen – especially in the winter when the ice and snow get to be huge problems for fiber protection. But our Chris Gemme tells us how to protect your assets so you – and your ...

          Sort By:

          Filters

          • Ordering Guide: FOSC 450 Fiber Optic Splice Closures

            FOSC 450 Fiber Optic Splice Closure Ordering Guide provides the information you need to specify and buy FOSC 450 splice closures and accessories for your fiber network.
            Download

          • At-A-Glance: Fiber Splice Closure - Spanish

            Fiber splice closures specifications and comparison and applications.
            Download

          • At-A-Glance: Fiber Splice Closure

            Fiber splice closures specifications and comparison and applications.
            Download

          • Brochure: FTTH Façade Solution

            The ideal solution for situations where underground installations are cost-prohibitive and pleasing aesthetics are important.
            Download

          • Ordering Guide: FOSC Modular Closure

            Download

          • Ordering Guide: FIST Modular Splice Closure

            The new FIST sleeve offers flexibility and efficiency and supports a variety of applications with simplified planning and logistics and intuitive assembly.
            Download