1×8 Fiber Optic Splitter | SC/APC & LC/UPC | BWNFiber

Two years ago, I received a call from a project manager in Lagos who had just completed a 5,000-home FTTH deployment. He used 1×8 splitters throughout the ODN — but sourced them from three different suppliers to save money on each batch. Six months later, his NOC dashboard showed a pattern: homes connected to “Batch B” splitters had 3× more trouble tickets than “Batch A.” The issue? Batch B’s splitters had uniformity loss of ±2.1 dB (not the ±1.0 dB claimed), and the worst ports were delivering -12 dBm to the ONT — just 1 dB above the GPON receiver’s sensitivity floor. Any fiber bend, connector dirt, or temperature swing pushed those subscribers offline. The fix? Replace 400 splitters. Cost: $18,000. Subscriber churn: 8% in six months.

The 1×8 splitter is the most common splitter in FTTH worldwide. It’s the dividing line between “small deployment” and “real network.” And because it’s so common, it’s also where corner-cutting suppliers do the most damage.

If you’re designing an ODN for 8 subscribers — whether that’s 8 homes, 8 apartments, or 8 small offices — the 1×8 splitter you choose determines whether your network runs silently for 15 years or generates support tickets from day one.

The short answer: A quality 1×8 PLC splitter delivers ~10.5 dB insertion loss with ±1.0 dB uniformity across all eight output ports. It supports 1260–1650 nm, operates from -40°C to +85°C, and is available with SC/APC, SC/UPC, or LC/UPC connectors. BWNFiber manufactures 1×8 splitters in ABS box, LGX cassette, rack-mounted 19-inch 1U, bare fiber, and blockless mini form factors.

Below: full specifications, a real-world power budget for an 8-home GPON drop, and the ordering parameters that prevent the Lagos scenario from happening to you. Skip to specs →

What Is a 1×8 Fiber Optic Splitter?

A 1×8 fiber optic splitter divides one input optical signal into eight output signals. In a standard 50:50:50:50:50:50:50:50 configuration, each output port receives approximately 12.5% of the input optical power.

The theoretical insertion loss is 9.0 dB (10 × log₁₀(8)). A BWNFiber PLC 1×8 splitter delivers:

• Typical insertion loss: 10.5 dB
• Maximum insertion loss: 10.8 dB
• Uniformity: ≤1.0 dB (port-to-port variation)
• Return loss (SC/APC): ≥55 dB

Why 1×8 is the FTTH standard: The math works. In GPON Class B+ (28 dB budget), a 1×8 splitter leaves ~17.5 dB for fiber, connectors, and margin — enough for 10–15 km of fiber and a robust safety buffer. In Class C+ (32 dB), you can push to 20 km or cascade another splitter layer. No other split ratio hits this sweet spot between subscriber density and link budget headroom.

Where 1×8 Splitters Are Used

• Standard FTTH drops — 8 homes per splitter is the global default
• MDU buildings — one 1×8 per floor or per wing
• Rural networks — 8 homes per village segment
• Cascade architectures — 1×8 at the FDH feeds eight 1×8s in the field = 64 subscribers
• 5G fronthaul — splitting CPRI signals to 8 small cells

1×8 Splitter Specifications

Standard Configuration

Available Connectors

Form Factors

Power Budget Example: 1×8 Splitter in a GPON Network

Real-world link budget for an 8-home FTTH drop:

Result: -16.1 dBm is comfortably within GPON Class B+ (-28 dBm sensitivity). You have 11.9 dB of headroom — enough to handle a second splitter cascade, fiber extension, or unexpected connector degradation.

Field example: A deployment I consulted on in Egypt used 1×8 splitters in a two-tier cascade: 1×8 at the central FDH, feeding eight 1×8 splitters in street cabinets. Total: 64 subscribers per OLT port. Loss: 10.5 + 10.5 = 21.0 dB for splitter cascade alone. With 5 km fiber and connectors: total ~26 dB. Still within GPON Class B+ (28 dB). The network has been running for 3 years without a single splitter-related trouble ticket.

1×8 Cascade Architecture

The most common large-scale FTTH design using 1×8 splitters:

OLT → 1×8 (FDH) → 8 × 1×8 (Field) → 64 ONTs

With 5 km fiber + connectors + 3 dB margin:

• Total link loss: ~26 dB
• Fits comfortably in GPON Class B+ (28 dB)
• For XGS-PON or longer distances: upgrade to Class C+ (32 dB)

Key rule: Never cascade more than two splitter tiers. Three tiers of 1×8 = 31.5 dB loss — too close to the budget limit with no safety margin.

When to Choose 1×8 vs 1×4 vs 1×16

BWNFiber 1×8 Splitter Ordering Guide

Required parameters:

1. Connector: SC/APC (default for GPON/XGS-PON), SC/UPC, LC/UPC, FC/APC 2. Pigtail length: 1.0 m standard, custom available 3. Pigtail diameter: 0.9 mm / 2.0 mm / 3.0 mm 4. Form factor: ABS box / LGX cassette / 19″ 1U / bare fiber / blockless mini 5. Fiber type: G.652.D or G.657.A2 (bend-insensitive)

Sample order:

“5,000 units, BWN-PLC-1X8-SC/APC, 1.0 m pigtail, 0.9 mm, ABS box, G.657.A2, with per-unit IL/RL test report, OEM packaging.”

Still Deciding? Here’s What to Do

• Request 5–10 sample units for OTDR testing
• Receive per-unit IL/RL test reports
• Compare uniformity across all 8 ports — the weak port tells you the real story
• Test at temperature extremes if deploying outdoors

📧 [email protected] | 📞 +86-13615744790 (WhatsApp)

Written by the BWNFiber engineering team. 16+ years manufacturing fiber optic splitters and FTTx solutions.

Related Reading:

• PLC Splitter vs FBT Splitter
• Fiber Optic Splitter Loss Chart
• 1×2 Fiber Optic Splitter
• 1×4 Fiber Optic Splitter
• GPON Splitter Solutions