FAT Fiber Access Terminal
The GL-CTO16 FAT (Fiber Access Terminal) is the pre-connectorized distribution node between your feeder or distribution cable and 16 subscriber drop cables. Huawei-compatible Mini SC reinforced adapters. Two splice trays. Integrated 1×16 or 2×1:8 PLC splitter. Tool-free drop cable activation. Sealed to IP65. Whether your procurement documentation calls it a FAT, CTO, NAP, or pre-connectorized terminal - this is the box.
16
Output ports
IP65
Protection
1:16
Max PLC split
−40°C
Low temp rated
Four names. One product. Zero confusion.
FAT, CTO, NAP, Pre-connectorized Terminal - What Each Name Means
Depending on your region, operator documentation, or supplier catalogue, the GL-CTO16 may be listed under four different names. All four describe the same distribution node performing the same function at the same position in the FTTH ODN. Here is the regional and technical context for each.
Fiber Access Terminal - the ITU-T and global standard term
FAT is the term used in ITU-T G.984, G.987, and related PON standards documentation. It describes any terminal enclosure at the feeder-to-drop junction in the FTTH ODN, integrating optical splitting, fiber splicing, drop cable distribution, and environmental protection. The GL-CTO16 is a 16-port FAT in every technical and standards-aligned sense.
Caixa Terminal Óptica - Latin American term
CTO is the dominant term across Brazil, Colombia, Argentina, and Mexico - originating from Portuguese ("Optical Terminal Box"). "CTO16" means a 16-port CTO, which is structurally and functionally identical to a 16-port FAT. The GL-CTO16 model designation reflects this naming convention. All CTO specifications and cable compatibility requirements are met by the GL-CTO16.
Network Access Point - European operator term
NAP is preferred by European FTTH operators - particularly in Spain, France, Eastern Europe, and the UK. It describes the same product at the same network position. A "16-port NAP box" in a European tender specification requires a GL-CTO16-equivalent product. All GL-CTO16 dimensions, protection ratings, and connector specifications are compatible with European FTTH NAP infrastructure requirements.
Pre-Connected Terminal - engineering description
"Pre-connectorized" or "pre-connected" terminal is the descriptive engineering term used in manufacturer documentation and procurement specifications globally, emphasising the key operational advantage: drop cables connect to the box without on-site splicing because the internal PLC splitter pigtails are already factory-routed to the Mini SC adapter ports. The GL-CTO16 is fully pre-connectorized.
Where the GL-CTO16 sits in your network
GL-CTO16 in the FTTH ODN Architecture
The FAT/CTO16 occupies the Access Distribution Point position in the FTTH ODN - the last splitter level before subscriber premises. Every design decision in the GL-CTO16 traces back to the specific mechanical and optical demands of this network position.
FTTH ODN signal path - GL-CTO16 position in the access network
At this node, the GL-CTO16 performs four simultaneous functions: optical splitting (1 feeder → 16 subscriber paths via integrated PLC splitter), fiber splicing (feeder cable to splitter input, managed in 2 splice trays), drop cable distribution (16 Mini SC hardened adapter ports for subscriber drop cables), and environmental protection (IP65-sealed ABS+PC housing for outdoor pole, wall, and aerial installation). In a pre-connectorized FAT, drop cable activation at each port requires only plugging in a pre-terminated cable - no opening the enclosure, no splicing.
Technical data
Full Specification - GL-CTO16 FAT Fiber Access Terminal
All parameters are manufacturer-verified production specifications. Contact our technical team to confirm suitability for non-standard cable configurations, custom splitter ratios, or OEM labeling requirements.
| Parameter | Specification | Notes / Operational relevance |
|---|---|---|
| Model | GL-CTO16 | FAT / CTO / NAP 16-port FTTH pre-connectorized terminal |
| Subscriber capacity | 16 drop cable outputs | 16 subscriber premises per GL-CTO16 node |
| Dimensions (L×W×H) | 208 × 241 × 117 mm | Compact for wall/pole/aerial installation |
| Max core capacity | 16 cores (single fiber) | One fiber per subscriber; GPON/XGS-PON compatible |
| Output adapter type | 16 × Huawei Opti-tap Mini SC reinforced | IP67 per-port sealed; compatible with Corning, Huawei, ODVA drop assemblies |
| Splitter | 1×16 or 2×1:8 steel-tube mini PLC | Field-swappable; factory-installed and tested; specify on order |
| Splice trays | 2 × 8-core, transparent cover | 1 steel-tube slot each; OTDR-accessible without tray removal |
| Cable entry | 1 mid-span port | Waterproof gland or uncut through-cable option |
| Cable diameter | Φ18mm max OD | Covers standard 4F–12F FTTH distribution cables |
| Housing material | ABS+PC with UV stabilizer | UV-stable; impact resistant; long-term outdoor service life |
| Protection grade | IP65 (IEC 60529) | Dust-tight + water-jet resistant; re-enterable key-lock access |
| Operating temperature | −40°C to +70°C | Arctic to tropical outdoor deployment range |
| Color | Grey | Standard; custom colors available on OEM order |
| Lock type | Key lock + 2 brackets included | Anti-tamper; 2 keys per unit; brackets for wall/pole mount |
| Mounting methods | Wall / pole / aerial | All hardware included; same SKU for all deployment types |
| Port labeling | Factory-labeled 1–16 | Custom laser marking on lid: OEM available |
| Compatible fiber | G.652D, G.657A SM | Vendor-agnostic passive component |
| Certifications | IP65 (IEC 60529) · RoHS | Batch test reports available on request |
| Warranty | 3 years | Year 1: return · Year 2: replace · Year 3: repair |
| MOQ | 20 units · Free samples available | 1–2 free samples for qualification testing |
Supported PLC Splitter Configurations
| Config | Splitter type | Feeder inputs | Active ports | Best use case |
|---|---|---|---|---|
| Standard | 1 × steel-tube mini 1×16 | 1 | 16 All ports active | Single OLT PON port, 16 subscribers - most common GPON deployment |
| Dual 1:8 | 2 × steel-tube mini 1:8 | 2 | 16 (8+8 separate paths) | Two OLT PON ports; 8 subscribers each; path diversity / redundancy |
| Phase-1 partial | 1 × steel-tube mini 1:8 | 1 | 8 active (ports 9–16 reserve) | Phase-1 deployment; expand to 1:16 or add second 1:8 on single re-entry |
Engineering specification
What the GL-CTO16 Delivers - Engineering Logic Behind Every Parameter
Each specification in the GL-CTO16 addresses a specific operational requirement at the FTTH distribution node. We explain the engineering reasoning - not just list numbers - so procurement teams can evaluate against competitive claims with precision.
16 × Huawei-Compatible Mini SC Reinforced Adapter Ports
The GL-CTO16 provides 16 factory-installed Huawei Opti-tap Mini SC reinforced adapter ports - the pre-connectorized interface between the internal PLC splitter pigtails and the subscriber drop cables. Mini SC reinforced adapters differ from standard SC adapters in three operationally important ways: the hardened housing withstands repeated plug-in/out cycles in outdoor conditions without housing cracking; the sealed cap design provides per-port IP67 environmental protection; and the Huawei Opti-tap dimensional compatibility ensures drop cable assemblies from all major FTTH equipment manufacturers connect without adapter mismatch.
Each port is factory-labeled for identification. Custom laser marking on the lid is available on OEM orders, enabling project-specific port-to-subscriber documentation to be applied at manufacture rather than added by hand in the field.
Two Splice Trays with Transparent Covers - 8 Cores Each, 1 Splitter Slot
The GL-CTO16 includes two splice trays with transparent covers, each accommodating fusion splicing for 8 fiber cores and providing 1 steel-tube fixation slot for the splitter pigtail pass-through. Total splice capacity: 16 fusion splices - one per subscriber output path, covering the feeder cable-to-splitter input splice for the complete 1×16 split configuration.
The transparent tray covers serve an operational purpose beyond protection: they allow OTDR trace verification at each splice point without opening the tray - the technician inserts the OTDR probe at the adapter port and can visually identify which splice is being evaluated through the transparent cover. This accelerates post-installation acceptance testing in multi-subscriber configurations where the failing splice must be located efficiently without disturbing the entire tray.
Integrated PLC Splitter - 1×16 Steel-Tube Mini or 2×1:8 Field-Swappable
The GL-CTO16 splitter tray accepts steel-tube mini PLC splitters in two configurations: a single 1×16 module (one feeder fiber → 16 subscriber paths) or two 1:8 modules (two feeder fibers → 8 paths each). The steel-tube PLC housing provides superior mechanical protection versus bare-chip or ABS-box mini PLCs in outdoor thermal cycling environments - the steel tube isolates the planar waveguide from direct thermal stress.
Configuration selection is project-dependent: 1×16 minimises feeder cable fiber consumption (1 fiber serves 16 subscribers); 2×1:8 provides path diversity for networks where two independent feeder fibers are routed for redundancy, or where the OLT port architecture allocates 8 subscribers per PON port. The GL-CTO16 accepts either configuration in the same physical tray slot - specify on order, with OEM custom configurations also available.
ABS+PC Housing - IP65, UV-Stabilized, Key Lock, −40°C to +70°C
The GL-CTO16 housing uses ABS+PC engineering plastic compound - polycarbonate for impact resistance and dimensional stability at temperature extremes, ABS for processability and UV inhibitor compatibility. The UV stabilizer additive prevents the surface photodegradation and micro-cracking that affects standard ABS in outdoor aerial and pole-top deployments within 2–3 years.
IP65 protection (complete dust-tight + water-jet resistant from any direction per IEC 60529) covers all standard above-ground outdoor deployment conditions. The key lock with two keys supplied prevents unauthorized access - a standard requirement for outdoor FTTH access terminal installations where the enclosure is accessible to non-technical personnel at subscriber premises. The compact 208×241×117mm footprint supports single-technician installation in all mounting configurations.
Wall / Pole / Aerial Mounting - All from a Single Housing SKU
The GL-CTO16 supports three standard FAT/CTO outdoor installation methods from a single housing configuration. Two mounting brackets are included as standard - configured for wall mounting (screw pattern for external wall attachment to concrete, brick, or timber surfaces) and pole mounting (hose clamp attachment compatible with 60–120mm round utility poles). Aerial messenger cable lashing attachment is also supported with the optional lashing bracket accessory.
The cable entry accepts up to Φ18mm cable outer diameter via mid-span entry (waterproof gland or uncut through-cable port). This diameter covers standard 4F–12F distribution cables commonly used as FTTH feeder cables to FAT/CTO nodes. Custom cable gland sizes available for non-standard feeder cable diameters.
Field installation
GL-CTO16 Installation in 4 Steps - No On-site Splicing at Subscriber Ports
The complete GL-CTO16 installation workflow. Splicing is required only at the feeder cable-to-splitter input connection - all 16 subscriber drop ports activate by plug-in. Total installation time for a fully-loaded 16-port GL-CTO16: approximately 45–60 minutes for a practiced installer.
Mount the enclosure
Attach the GL-CTO16 to the installation surface using the supplied brackets - wall mount (screw pattern) or pole mount (hose clamp attachment). Confirm the orientation provides correct cable entry direction and the Mini SC adapter panel faces downward or sideways to minimize water pooling at port caps.
Prepare and splice feeder cable
Route the feeder cable through the cable entry gland (Φ18mm max). Strip the cable to the appropriate length, route to the splice tray, and fusion splice the feeder fiber(s) to the PLC splitter input pigtail(s). Load the splice protector into the steel-tube fixation slot and close the tray.
Verify with OTDR
Before closing the enclosure, verify insertion loss at the splitter input using an OTDR from the feeder cable side. Confirm splice loss is within link budget. For 1×16 configuration: expected IL at each output port is approximately 12.5–13.5dB (splitter IL) + splice loss + cable attenuation.
Activate subscriber ports
Close and lock the enclosure. Each of the 16 Mini SC adapter ports can now be activated independently by plugging in a pre-terminated drop cable assembly - no opening the enclosure, no splicing. Pull the port cap, plug the drop cable connector, and the subscriber path is live.
Installation Types
Wall-mounted Installation
Secure and space-efficient mounting on vertical surfaces, ideal for building basements, corridors, and equipment rooms.
Pole-mounted Installation
Designed for outdoor applications with sturdy mounting brackets that attach securely to telephone poles and utility posts.
Wire Messenger Installation
Suspension installation between poles or structures using messenger wire, providing flexibility in aerial deployments.Industrial Internet of Things
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.
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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