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Introduction

Opelink manufactures high-quality fiber optic distribution boxes designed for FTTH (Fiber to the Home) and access network applications. With 13+ years of experience, we provide reliable distribution solutions for telecommunications operators, ISPs, and network infrastructure projects worldwide.

Fiber optic distribution box, also known as fiber terminal box or FTTH box, is a device that terminates distribution cables and provides connection points for individual customer drop cables. These boxes are typically installed at the network edge - on building walls, utility poles, or in underground handholes - serving as the interface between the distribution network and end users.

Opelink offers a comprehensive range of distribution boxes with various port configurations, mounting options, and protection levels. Our boxes support both spliced and pre-connectorized drop cables, with optional PLC splitter integration for PON networks. All products are designed for easy installation, maintenance, and expansion.

Distribution Box Types

Opelink offers various fiber optic distribution box types for different applications:

1. Wall-Mount Distribution Box

• Mounted on exterior or interior walls
• Compact design for building entry points
• Capacity: 8-24 ports
• IP54-IP65 protection
• SC or LC adapter panels
• Models: 8-port, 16-port, 24-port configurations

2. Pole-Mount Distribution Box

• Mounted on utility poles
• Designed for aerial distribution
• Capacity: 16-48 ports
• IP65 protection
• Weather-resistant construction
• Integrated cable management

3. Underground Distribution Box

• Installed in handholes or pedestals
• Designed for buried cable access
• Capacity: 24-48 ports
• IP68 protection available
• Robust construction for soil pressure
• Optional pedestal mounting

4. Indoor Distribution Box

• Wall-mount for indoor installations
• Aesthetic design for residential/commercial
• Capacity: 8-16 ports
• IP40-IP54 protection
• Flush-mount or surface-mount options
• Lockable for security

Technical Specifications

Parameter	Wall-Mount	Pole-Mount	Underground
Mounting	Wall screws	Pole clamps	Handhole/pedestal
Capacity	8-24 ports	16-48 ports	24-48 ports
Adapter Types	SC, LC	SC, LC	SC, LC
Protection Level	IP54-IP65	IP65	IP65-IP68
Splitter Option	1x8, 1x16 PLC	1x16, 1x32 PLC	1x32 PLC
Cable Entry	Bottom/side	Bottom	Bottom
Material	ABS, PC	PC, ABS	PP, PC
Operating Temp	-25°C to +65°C	-40°C to +70°C	-40°C to +70°C

Splitter Integration

Opelink distribution boxes support integrated PLC splitters for PON (Passive Optical Network) applications:

.1x8 Splitter: Splits one fiber to 8 customers. Common in small buildings or residential clusters. Typical insertion loss: ≤10.5dB.
.1x16 Splitter: Splits one fiber to 16 customers. Standard for FTTH deployments. Typical insertion loss: ≤13.5dB.
.1x32 Splitter: Splits one fiber to 32 customers. Used in high-density areas. Typical insertion loss: ≤16.5dB.
.Splitter Installation: Splitters can be pre-installed at factory or field-installed. Boxes include dedicated splitter mounting slots and fiber routing channels. Both cassette and bare fiber splitter types supported.
.Cascading: Multiple splitters can be cascaded for higher split ratios (e.g., 1x4 followed by 1x8 = 1x32 total). Distribution boxes support intermediate splitting points in cascaded PON architectures.

Applications

• FTTH Networks: Final distribution point to residential customers
• FTTB (Fiber to the Building): Building entry and vertical distribution
• FTTC (Fiber to the Curb): Curb-side distribution cabinets
• MDU (Multi-Dwelling Units): Apartment building fiber distribution
• Business Parks: Commercial customer fiber access
• Campus Networks: University and corporate campus distribution
• Rural Broadband: Village and remote area fiber distribution
• Temporary Networks: Event venues, construction sites, emergency response

Installation Methods

.Wall Mounting: Use appropriate wall anchors for the wall material (concrete, brick, wood). Ensure box is level and secure. Leave space below for cable entry and above for future expansion. Seal cable entry points with appropriate grommets.
.Pole Mounting: Use stainless steel pole clamps suitable for pole diameter. Mount at accessible height (typically 2-3 meters). Ensure proper grounding if metal components present. Allow drip loops for aerial cables.
.Underground Installation: Install in handhole or pedestal with proper drainage. Ensure box is level and stable. Use conduit for cable entry. Seal all entries to prevent water ingress. Consider soil type and burial depth requirements.
.Indoor Installation: Mount at convenient height for access. Use surface mount or flush mount as appropriate. Ensure adequate space for door opening and cable management. Label clearly for identification.

FAQ

Q1: What is the difference between a distribution box and a splice closure?

A: A distribution box provides accessible fiber ports (adapters) for connecting drop cables to the network, designed for frequent access during customer installations. It typically has 8-48 ports with SC/LC adapters and may include splitters. A splice closure protects cable splices without accessible ports, designed for rare access during repairs. Distribution boxes are used at the network edge for FTTH; splice closures are used throughout the network for cable joining and repair.

Q2: Should I choose pre-connectorized or spliced drop cables?

A: Pre-connectorized drop cables offer faster installation - simply plug into the adapter without field splicing. They're ideal for FTTH deployments with standardized connector types. Spliced drop cables offer more flexibility - any fiber type or connector can be used, and repairs are easier. They're preferred for custom installations or when connector types vary. Opelink distribution boxes support both approaches with adapter panels and splice trays available.

Q3: How do I calculate the number of ports needed for a distribution box?

A: Calculate based on: (1) Current customers - count existing connections needed; (2) Immediate expansion - customers expected within 1 year; (3) Long-term capacity - total potential customers in service area; (4) Spare ports - 20-30% spare for flexibility. Example: 12 current apartments + 8 planned + 20% spare = 24 ports minimum. Consider splitters if using PON - a 1x16 splitter serves 16 customers from one port. Always round up to standard box sizes (8, 16, 24, 32, 48 ports).

Q4: What is the difference between SC and LC connectors in distribution boxes?

A: SC connectors are larger (2.5mm ferrule) and were the standard for many years. They're robust and easy to handle, making them common in outdoor and FTTH applications. LC connectors are smaller (1.25mm ferrule) and provide higher density - twice as many ports in the same space. LC is becoming the standard for new deployments. Opelink distribution boxes are available with SC, LC, or mixed adapter configurations. Choose based on your existing infrastructure and future plans.

Q5: Can distribution boxes be used with both GPON and EPON networks?

A: Yes, Opelink distribution boxes are passive devices that work with any PON technology (GPON, EPON, XGS-PON). The box provides physical fiber connectivity and splitting; the PON technology is determined by the OLT and ONT equipment. Ensure your splitter specifications match your PON wavelength requirements: GPON uses 1310/1490nm, XGS-PON adds 1577/1270nm. Opelink splitters support all standard PON wavelengths. The distribution box itself is technology-agnostic and can be upgraded by changing splitters or adding WDM filters.