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Product Overview & Advanced Cascaded PON Topologies
The MTT Series Fiber TAP Terminal Box is a pre-connected, asymmetric optical splitter enclosure designed for cascaded passive optical network (PON) topologies. Unlike conventional balanced hubs, this series incorporates precision uneven optical splitters.
This design routes a high percentage of the incoming signal path directly to a dedicated external Cascade Port to feed subsequent downstream terminals, while provisioning the remaining low percentage of optical power locally to individual subscriber drop ports. Built to act as a direct, high-value replacement in modern optical architectures, all ports are natively Pushlok® compatible, enabling rapid integration into single-mode networks.
By deploying the Fiber TAP family along linear corridors (such as rural highways or suburban streets), network architects can link multiple termination points in a daisy-chain series using just a single single-mode fiber core, reducing upstream backbone cable investment by up to 80%.
Complete MTT Asymmetric Split Ratio Technical Parameters Table
The full specification breakdown across 70:30 and 50:50 asymmetry split profiles is detailed below:
Table 1: 70:30 Asymmetric Ratio Variant Specs
1:9 TAP (70:30) 2 Layers
1:9 TAP(70:30)
1:17 TAP(70:30) 2 Layers
| Item Model Name | Physical Dimensions (H×W×D) | Integrated TAP Splitter Layout | Split Uniformity | Maximum Insertion Loss (Drop vs. Cascade Link) | Port Configuration Layout | Layer Structure |
| 1:3 TAP (70:30) | 154mm x 97mm x 28mm | 1 pc 1:3 Splitter Module | 70:30 | ≤10.4dB (Drop) / ≤2.4dB(Cascade) | 4 Ports (1 In + 1 Cascade + 2 Local Drops) | 1 Layer Small |
| 1:5 TAP (70:30) | 154mm x 155mm x 28mm | 1 pc 1:5 Splitter Module | 70:30 | ≤13.4dB (Drop) / ≤2.4dB (Cascade) | 6 Ports (1 In + 1 Cascade + 4 Local Drops) | 1 Layer Medium |
|
1:9 TAP (70:30) 2 Layers |
154mm x 82mm x 47.5mm | 1 pc 1:9 Splitter Module | 70:30 |
≤16.5dB (Drop) / ≤2.4dB (Cascade) |
10 Ports (1 In + 1 Cascade + 8 Local Drops) | 2 Layer Small* |
|
1:9 TAP (70:30) |
154mm x 140mm x 47.5mm | 1 pc 1:9 Splitter Module | 70:30 | ≤16.5dB (Drop) / ≤2.4dB (Cascade) | 10 Ports (1 In + 1 Cascade + 8 Local Drops) | 1 Layers Medium |
|
1:17 TAP (70:30) 2 Layers |
154mm x 140mm x 47.5mm | 1 pc 1:17 Splitter Module | 70:30 | ≤19.5dB (Drop) / ≤2.4dB (Cascade) | 18 Ports (1 In + 1 Cascade + 16 Local Drops) | 2 Layers Medium |
Table 2: 50:50 Asymmetric Ratio Variant Specs
1:9 TAP (50:50) 2 Layers
1:9 TAP (50:50) 1 Layers
1:17 TAP (50:50) 2 Layers
| Item Model Name | Physical Dimensions (H×W×D) | Integrated TAP Splitter Layout | Split Uniformity | Maximum Insertion Loss (Drop vs. Cascade Link) | Port Configuration Layout | Layer Structure |
| 1:3 TAP (50:50) | 154mm x 97mm x 28mm | 1 pc 1:3 Splitter Module | 50:50 | ≤ 7.8dB (Drop) / ≤3.6dB (Cascade) | 4 Ports (1 In + 1 Cascade + 2 Local Drops) | 1 Layer Small |
| 1:5 TAP (50:50) | 154mm x 155mm x 28mm | 1 pc 1:5 Splitter Module | 50:50 | ≤10.8dB (Drop) / ≤3.6 dB (Cascade) | 6 Ports (1 In + 1 Cascade + 4 Local Drops) | 1 Layer Medium |
|
1:9 TAP (50:50) 2 Layers |
154mm x 82mm x 47.5mm | 1 pc 1:9 Splitter Module | 50:50 | ≤13.8dB (Drop) / ≤3.6 dB (Cascade) | 10 Ports (1 In + 1 Cascade + 8 Local Drops) | 2 Layer Small* |
|
1:9 TAP
(50:50) 1 Layers |
154mm x 140mm x 47.5mm | 1 pc 1:9 Splitter Module | 50:50 | ≤13.8dB (Drop) / ≤3.6 dB (Cascade) | 10 Ports (1 In + 1 Cascade + 8 Local Drops) | 1 Layers Medium |
|
1:17 TAP
(50:50) 2 Layers |
154mm x 140mm x 47.5mm | 1 pc 1:17 Splitter Module | 50:50 |
≤17.2 dB (Drop) / ≤ 3.6 dB (Cascade) |
18 Ports (1 In + 1 Cascade + 16 Local Drops) | 2 Layers Medium |
Accessory List
Installation Form
FAQ
What is an asymmetric fiber TAP terminal box and how does it work?
An asymmetric fiber TAP terminal box is a specialized outside plant (OSP) pre-connected enclosure designed for linear or daisy-chained passive optical network (Linear PON) architectures. Unlike standard splitter boxes that divide optical power equally, a TAP terminal utilizes an uneven splitter. It routes the majority of the incoming optical signal power (e.g., 70% or 50%) to a dedicated Cascade Port to feed the next terminal in the chain, while allocating the remaining lower power (e.g., 30% or 50%) locally to distribute to subscriber drop lines.
Are MTT series asymmetric TAP boxes fully compatible with Corning Pushlok® hardware?
Yes, the MTT Series asymmetric TAP boxes are engineered to be 100% Pushlok® compatible. Every input, cascade, and local subscriber drop port features an exact ultra-small form factor (USFF) alignment channel and locking slot that intermates seamlessly with standard Pushlok-style pre-terminated drop lines. This allows service providers to integrate our cost-effective MTT enclosures directly into existing Evolv® or similar slimline hardened network deployments without needing specialized brand tools.
What are the maximum insertion losses for a 70:30 asymmetric TAP terminal?
For our 70:30 asymmetric TAP terminal family, the maximum insertion loss is strictly separated into two technical specifications across 1310nm/1550nm windows:
Downstream Cascade Port: ≤2.4dB, ensuring minimal attenuation so the signal can pass through multiple cascaded boxes over long distances.
Local Subscriber Drop Ports: Ranges from ≤10.4dB (for a 1:3 TAP) up to ≤19.5 dB (for a high-capacity 1:17 TAP), depending on the internal balanced splitter configuration.
What are the differences between 70:30 and 50:50 asymmetric TAP configurations?
The primary difference lies in the optical power budget allocation and the maximum number of terminals you can cascade on a single fiber line:
70:30 Split Ratio: Passes 70% of the light downstream and keeps 30% locally. This configuration allows for a longer daisy chain, typically supporting up to 8 to 10 TAP boxes in a single serial sequence.
50:50 Split Ratio: Passes 50% of the light downstream and keeps 50% locally. This provides more signal power to local subscribers but limits the chain length, typically supporting 4 to 5 cascaded terminals.
Can the MTT asymmetric TAP box be installed in wet underground handholes?
Yes, the MTT series features a certified IP68 ingress protection rating, making it fully qualified for damp or flooded underground environments such as handholes, manholes, and pedestals. The high-strength, UV-stabilized polymer housing is completely moisture-proof and certified to withstand continuous fluid submersion at a depth of 3 meters (10 feet) for 7 consecutive days, ensuring long-term optical reliability and zero signal degradation.
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