16 Core Optical Fiber Cable Distribution Box

A1: A 16 core optical fiber cable distribution box (also called a fiber distribution box, FDB, or ODB) is an outdoor enclosure that serves as the junction point between the distribution (feeder) fiber cable and the individual drop cables running to subscriber premises. Inside the box, a PLC splitter divides one feeder fiber signal into up to 16 outputs. Each output connects to a drop cable running to one subscriber's ONT/ONU. The GL-ODB-16S uses FastConnect technology: 16 SC adapter ports are factory-pre-configured with the splitter pigtails, so subscriber drop cables connect by plugging in - no on-site fiber splicing is required at the subscriber port level. The enclosure provides IP65 environmental sealing to protect the splitter, splices, and adapters from outdoor exposure across the service life of the deployment.

A2: Both configurations serve 16 subscriber drop cable ports from the GL-ODB-16S. The difference is in feeder cable architecture: A 1:16 configuration uses one PLC splitter module that takes a single feeder fiber and splits it into 16 outputs. One OLT PON port serves all 16 subscribers. This is the standard configuration for most GPON FTTH deployments. A 2×1:8 configuration uses two separate 1:8 PLC splitter modules, each taking one feeder fiber and producing 8 outputs. Two OLT PON ports (or two feeder fibers) are required. Each feeder independently serves its own 8 subscribers. This configuration is used in networks requiring path diversity - for example, if two feeder cables run from different OLTs for redundancy, or where the feeder cable pair was allocated at network design. The GL-ODB-16S supports field-swapping between these configurations by replacing the splitter module in the tray slot, without re-splicing any of the 16 output connections.

A3: IP65 provides complete dust-tight protection and water-jet resistance from any direction - the protection level required for above-ground outdoor installations including aerial pole, wall-mount, and messenger cable positions where the enclosure is exposed to rain, condensation, and driving wind-blown water. IP65 is the correct and sufficient specification for the majority of outdoor FTTH distribution point deployments. IP68 (continuous submersion rated) is required for direct-burial installations, flooded manhole applications, and deployments in coastal or riverside locations where periodic submersion occurs. The GL-ODB-16S standard model is IP65. If your deployment includes below-grade manholes, submersion-risk locations, or direct-burial requirements, contact our technical team for IP68 variant availability and specifications.

A4: Yes. The GL-ODB-16S sealing mechanism uses vulcanized silicone tape combined with the hasp locking structure. Vulcanized silicone has high compression recovery - when the cover is re-closed and the hasp re-engaged after maintenance, the seal re-establishes to IP65 standard without replacement parts. This is the key design advantage over heat-shrink sealed enclosures, which lose their IP rating permanently at first opening and require new sealant material to restore protection. The GL-ODB-16S can be re-entered for splitter module upgrades, fault isolation, drop cable port changes, and fiber routing adjustments across the full outdoor service life of the deployment without degrading environmental protection or stocking seal replacement kits.

A5: The GL-ODB-16S accepts cables up to 20mm outer diameter at all three cable entry ports (two uncut cable ports and one branch cable port). This covers the full range of standard FTTH feeder cable types: 4F to 12F micro-tube cables (typically 8–12mm OD), 24F loose-tube distribution cables (typically 12–16mm OD), and standard 48F backbone cables (typically 16–20mm OD). Cable entry seals use modulated rubber compression - the seal compresses to the cable diameter on installation without requiring a specific gland insert for each diameter. Compatible cable structures include loose sleeve, skeleton, and ribbon optical cables. For the 16 drop cable output ports, compatible drop cable types include standard 2.0×3.0mm flat (butterfly) cable and 3.0mm round cable with SC/APC or SC/UPC FastConnect termination.

A6: FastConnect technology eliminates on-site fiber splicing at subscriber drop cable connection points. In traditional fiber distribution boxes, activating each subscriber port requires field fusion splicing - stripping the drop cable, cleaving the fiber, running the fusion splicer, loading the splice into a tray, and routing excess fiber: approximately 20–30 minutes per subscriber port. With the GL-ODB-16S, subscriber activation requires only plugging a pre-terminated FastConnect drop cable into the SC adapter port: approximately 2 minutes per subscriber. For a fully-loaded 16-port GL-ODB-16S serving 16 subscribers, the comparison is approximately 320 minutes (5+ hours) of splicing versus 32 minutes of plug-in connection - an 80% reduction in distribution-level activation labor. Across a 1,000-subscriber FTTH rollout with approximately 63 distribution boxes, FastConnect labor savings total approximately 430 hours of skilled splice technician time.

A7: The GL-ODB-16S supports four standard outdoor distribution box installation methods: wall mounting (rear bracket with standard fixing points for exterior building walls, utility room walls, and equipment room walls), pole mounting (hose clamp attachment positions for 60–120mm diameter poles), aerial messenger cable mounting (lashing bracket for strand wire in aerial cable routes), and manhole/handhole installation (orientation-agnostic sealed design - the box can be positioned horizontally or at any angle in a handhole installation). Wall and pole mounting kits are available as factory-supplied optional accessories - please specify the required mounting kit when ordering. The 332×268×111mm footprint and 1.6–2kg loaded weight support single-technician installation in all four configurations.

A8: Yes. The two uncut cable ports allow the feeder cable to pass through the GL-ODB-16S without being cut, with selected fibers entered into the splice cassette for connection to the splitter at this distribution node. The remaining fibers in the feeder cable continue to downstream distribution boxes in the cascade. This is the standard topology for linear FTTH distribution routes along a pole line or building facade - a single multi-fiber feeder cable provides fiber to multiple distribution boxes, with different fiber subsets served at each box. The splice cassette in the GL-ODB-16S accommodates the splice between the feeder fiber and the splitter input, while the uncut cable's remaining fibers are secured and routed through the cassette to the second cable exit port without needing to be stripped or spliced at this node.

A9: Standard MOQ for the GL-ODB-16S is 10 units. Free samples (1–2 units) are available for technical evaluation, network qualification testing, and installer training before bulk order commitment - no minimum purchase required. Standard configurations ship within 15 business days. OEM/ODM orders - custom branding, housing colors, adapter type modifications, IP68 upgrade, non-standard splitter configurations - are accepted with 25–30 business days from specification confirmation. Volume pricing tiers available from 50 units. Full specification sheets, IP65 test reports, and RoHS declarations provided on request. Contact sales@gloryoptic.com with your project requirements, annual volume estimate, and delivery location for complete pricing and logistics information.

A10: These terms describe the same category of product with regional and vendor-specific naming differences: FDB (Fiber Distribution Box) - the general international term for an outdoor enclosure at the feeder-to-drop cable junction, typically integrating a PLC splitter. The GL-ODB-16S is an FDB. ODB (Optical Distribution Box) - same as FDB; ODB is used by some Asian manufacturers and ISPs. GL-ODB-16S uses this notation. CTO (Caixa Terminal Óptica) - the Brazilian/Latin American term for the same product type, particularly for pre-connectorized versions with hardened Mini-SC adapters. FAT (Fiber Access Terminal) - used in some markets to describe the same distribution box function, particularly in Quick ODN deployments. All four terms describe outdoor fiber enclosures at the feeder-to-drop transition with integrated splitters, serving essentially the same network function. The GL-ODB-16S qualifies under all four naming conventions and is fully compatible with international GPON/FTTH network architectures using any of these terminology conventions.