Product Overview

This is a Fiber Optic Manhole and well-designed solution for underground utility networks. We call it the GL46 SMC Modular Inspection Manhole. It is a key part of Fiber-to-the-Home (FTTH) projects and situations where multiple network operators need to share space.
It puts fiber distribution, splicing, protection, and smart monitoring into one strong box. We built it to handle the complex and dense needs of today's networks, like 5G connections, making it a solid choice for building smart cities.
Technical Specifications
| GL46-4 | Manhole | Cover | |
| Load Bearing | SCTE-77 Tier22 | SCTE-77 Tier22 | |
| Internal size | 24x36 inch | 26x39 inch | |
| External size | 26x39 inch | ||
| Height | 24 inch | 1.5 inch | |
| Weight | 78 lbs | 77 lbs | |
| Fastening | FastClip | S.S Screw | |
Features
Holds a Lot of Cables and You Can Add More
The inside uses a system of trays that you can add to. You can start with cables for 24 to 96 connections in one spot. If you need more, you can expand it to hold up to 576 fibers in total. This is perfect for growing networks, for 5G equipment, and for connections between data centers. For example, a project in Hangzhou used this to prepare for future network growth without digging up the street again.
Built Tough and Safe
We chose the SMC-F46 material because it's very strong. It handles the pressure from the ground above very well. It also doesn't conduct electricity and doesn't rust, which makes it safer for workers and protects the cables from bad stuff in the soil and water.


Easy to Use and Fits Standard Systems
We made it simple to work with. It fits well with the equipment used by major phone and internet companies. The parts come ready to put together, so installation is quick and doesn't need many tools. This saves time and money when installing it or when technicians need to open it for maintenance.
Smart Monitoring Inside
This is a special feature. We put a smart fiber sensor system inside it. This system can feel very small changes in shape or pressure, as small as 0.1 microstrain. It watches for problems like the ground settling or someone trying to break in. We combine this with smart software that can predict issues. Our data from field tests shows this can cut unexpected breakdowns by about 30%. This saves money and keeps the network running smoothly.
Application
This inspection Fiber Optic Manhole is great for many modern projects:
Smart City Tunnels
It helps organize and protect power and internet lines that share the same underground tunnel. A utility corridor project in Shanghai used our manholes for this purpose.
5G Small Cell Sites
It acts as a small hub for 5G antenna connections. One unit can support connections for over 2,000 users, which is ideal for busy areas in cities like Beijing.
Upgrading Old Underground Boxes
It can replace old, simple manholes to hold more cables and add smart monitoring.
FTTH Neighborhood Projects
It works well as a main connection point for bringing fiber internet to homes and buildings.

The product is designed to follow the Chinese industry standard YD/T 778-2006. It works with different network providers, which is important for shared infrastructure. We have tested it thoroughly, and it has been used successfully in more than 35 smart city projects around the world. It has proven to be very reliable, with a long time between failures and an uptime of 99.999%. Independent lab tests from certified facilities in Ningbo have confirmed its sealing and material performance.
In short, the GL46 SMC Modular Inspection Manhole is a smart, strong box for your underground fiber cables. It doesn't just sit there; it helps you watch over your network. We believe its tough build and smart features make it a great choice for building a network that is ready for today and for the future.
Our Quality Promise
Comprehensive 3-Year Warranty
We confidently back all our products with a 3-year warranty. Our specific service policy is: within one year for quality issues, we take full responsibility for returns; within two years, for replacements; and within three years, for repairs.
Clear & Competitive MOQ
We welcome both trial and bulk orders. Our standard Minimum Order Quantity (MOQ) is 50 units. We also offer free samples for testing to help you evaluate our quality with confidence.
Fast & Reliable Logistics
We guarantee delivery within 10 days for standard items. Our logistics advantage includes cost-effective door-to-door service to simplify shipping for you.
Always-On Support
Our customer service team is available 24/7 to answer your inquiries and provide quotes promptly.
Our Foundation
Backed by 18 years of experience since 2008, we control quality from our own factory, accept OEM/ODM requests, and maintain ready stock for wholesale. We focus on delivering the optimal balance of price and quality directly to end customers worldwide.
Your trust is our priority. Partner with us for dependable fiber optic solutions supported by clear promises.
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