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OPTOMER Cable Slack Storage Boxes
OPTOMER Cable Slack Storage Boxes provide a practical solution for organising and protecting spare cable within passive telecommunications infrastructure. They are intended for use wherever cable reserves must remain easily accessible while being protected from accidental damage during everyday network operation.
The product range consists of three models: SZ-4.1, SZ-4 and SZ-4.2. Each version differs in dimensions, storage capacity and number of cable ports, making it easy to select the most suitable enclosure for compact installations as well as larger operator networks.
What are Cable Slack Storage Boxes used for?
Cable Slack Storage Boxes are designed to store spare cable in a safe and organised manner. Their internal cable storage frame allows the cable to be wound evenly, helping maintain the recommended bending radius while reducing the risk of damage during installation, maintenance or future network expansion.
The protective enclosure also shields cable reserves from dust, dirt and accidental mechanical impact while providing convenient access whenever servicing or network modifications are required.
Typical applications include:
- Telecommunications manholes
- Cable chambers
- FTTH and FTTx access networks
- Telecommunication infrastructure
- CATV networks
- Locations requiring spare cable for future expansion or repairs
Choose the Right Model
SZ-4.1 | Space-Saving Solution
The smallest enclosure in the series, designed for installations with limited mounting space. Equipped with 4 cable ports and a lockable cover. Suitable for storing cable reserves with cable diameters up to 10 mm while maintaining proper cable routing and bending radius.
SZ-4 | The Most Versatile Choice
A versatile solution for standard fibre optic and telecommunication networks. Features 4 cable ports and provides storage for cable reserves of various diameters. Designed for installation in telecommunications manholes and cable chambers, combining compact dimensions with high functionality.
SZ-4.2 | Built for Maximum Capacity
The largest model in the product family, equipped with 6 cable ports for greater routing flexibility. Intended for larger cable reserves and cables with diameters up to 18 mm. Recommended for demanding FTTH, FTTx and telecommunications infrastructure projects requiring maximum storage capacity.
Installation and Cable Routing
All three models follow the same installation principle. After removing the cover, the cable is routed through flexible rubber cable glands and wound around the integrated internal storage frame. Before fixing the enclosure to the wall, the cable entry and exit direction should be planned, as cable ports are located on opposite sides of the housing.
This arrangement simplifies cable organisation while providing convenient access to stored cable during maintenance, repairs and future network upgrades.
Why Choose OPTOMER Cable Slack Storage Boxes?
- Designed specifically for passive fibre optic and telecommunication infrastructure
- Integrated cable storage frame ensures organised cable management
- Helps maintain the recommended minimum cable bending radius
- Protects stored cable against mechanical damage and contamination
- Available in three sizes to match different installation requirements
- Suitable for both new network deployments and infrastructure modernisation
- Easy access to cable reserves for future maintenance and expansion
Frequently Asked Questions
SZ-4.1 • SZ-4 • SZ-4.2
What is the difference between SZ-4.1, SZ-4 and SZ-4.2?
The models differ mainly in enclosure size, cable storage capacity and the number of cable ports, allowing users to choose the most suitable version for their installation.
Which model offers the largest cable capacity?
SZ-4.2 is the largest model in the range and is intended for applications requiring the highest cable storage capacity.
Where can these storage boxes be installed?
They are designed for telecommunications manholes, cable chambers and other passive telecommunications infrastructure.
Can they be used in FTTH networks?
Yes. They are suitable for FTTH, FTTx and other fibre optic access networks where spare cable storage is required.
Why is maintaining the cable bending radius important?
Maintaining the recommended bending radius helps preserve cable performance and reduces the risk of fibre damage during installation and long-term operation.
| Parameter | SZ-4 | SZ-4.1 | SZ-4.2 |
|---|---|---|---|
|
Material
|
Steel | Steel | Steel |
| Colour | RAL 7035 | RAL 7035 | RAL 7035 |
| Dimensions (W × H × D) | 550 × 550 × 100 mm | 450 × 450 × 130 mm | 750 × 750 × 150 mm |
| Weight | 6,5 kg | 5 kg | 10 kg |
| Mounting | 4 x Ø8,5 mm holes, 300×300 mm | 4 x Ø8,5 mm holes, 250×250 mm | 4 x Ø8,5 mm holes, 500×500 mm |
| Number of inputs/outputs of a cable | 4 | 4 | 6 |
| Cable diameter range | Ø7–12 mm | Ø7–10 mm | Ø10–18 mm |
| Securing access to the interior | 180 m (Ø7 mm) | 160 m (Ø7 mm) | 280 m (Ø10 mm) |
|
Securing access
to the interior
|
lock | lock | lock |
Storage Capacity
| Cable Diameter | SZ-4 | SZ-4.1 | SZ-4.2 |
|---|---|---|---|
| Ø7 mm | 180 m | 160 m | – |
| Ø8 mm | 140 m | 110 m | – |
| Ø9 mm | 110 m | 60 m | – |
| Ø10 mm | 90 m | 30 m | 280 m |
| Ø11 mm | 50 m | – | 220 m |
| Ø12 mm | 20 m | – | 180 m |
| Ø13 mm | – | – | 150 m |
| Ø14 mm | – | – | 110 m |
| Ø15 mm | – | – | 70 m |
| Ø16 mm | – | – | 50 m |
| Ø17 mm | – | – | 18 m |
| Ø18 mm | – | – | 16 m |
SZ-4, SZ-4.1, SZ-4.2 spare length cable box
DESCRIPTION
OPTOMER Cable Slack Storage Boxes are designed for the safe storage of spare fibre optic and telecommunication cables in telecommunications manholes, cable chambers and other network infrastructure. Their enclosed design keeps cable reserves organised, maintains the correct minimum bending radius and protects cables against mechanical damage, dirt and environmental exposure. The product family includes three models, allowing installers to select the appropriate capacity for different network applications.
➜ Safe storage of fibre optic and telecommunication cable slack
➜ Helps maintain the correct cable bending radius
➜ Protects cable reserves from mechanical damage and contamination
➜ Designed for telecommunications manholes and cable chambers
➜ Three models for different cable capacities and installation requirements
TECHNOLOGY


































