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What the platform delivers, where it fits, and the sourcing advantage of buying the terminal and the PON optics from one factory.
All three models share the same 2.5G GPON line rate — 2.5 Gbps downstream and 1.25 Gbps upstream per PON port — and the same 20 km transmission reach without signal regeneration. What changes is capacity: because a single PON port serves up to 128 subscribers through passive optical splitters, the 4-port unit scales to roughly 512 subscribers, the 8-port unit to around 1,024, and the 16-port unit to as many as 2,048. Splitter ratios from 1:16 to 1:128 let you trade per-subscriber bandwidth against port utilization on a build-by-build basis.
| Specification | 4PON | 8PON | 16PON |
|---|---|---|---|
| PON ports | 4 | 8 | 16 |
| Downstream / upstream | 2.5G / 1.25G | 2.5G / 1.25G | 2.5G / 1.25G |
| Subscribers / PON port | up to 128 | up to 128 | up to 128 |
| Max subscribers | up to 512 | up to 1,024 | up to 2,048 |
| Reach | up to 20 km | up to 20 km | up to 20 km |
| Splitter ratios | 1:16 – 1:128 | 1:16 – 1:128 | 1:16 – 1:128 |
| Management | CLI · Web · SNMP | CLI · Web · SNMP | CLI · Web · SNMP |
FB-LINK manufactures the full optical chain, not just the terminal. The same factory that ships the GPON OLT also produces the matching 2.5G GPON SFP modules in Class B+ and Class C+ power budgets, plus GPON ONU and EPON OLT hardware. Sourcing the head-end and the PON transceivers on one order removes cross-vendor compatibility risk and consolidates your bill of materials with a single point of accountability.
Because the platform follows the ITU-T G.984.x GPON recommendations, it operates in point-to-multipoint mode against standards-compliant ONUs and ONTs rather than locking you to one terminal vendor. AES encryption, VLAN isolation, and access control lists protect subscriber traffic, while service-specific VLANs and bandwidth profiles let a single fiber carry internet, voice, and video concurrently.
Provisioning runs through CLI for scripted rollouts, a Web interface for day-to-day operations, and SNMP for integration with existing network management systems; NETCONF and open APIs support automated provisioning where your OSS requires it. That matters at scale — a 16-port unit managing up to 2,048 subscribers is only as good as the tooling used to turn services up and monitor them.
Written for sourcing managers and product engineers evaluating a private-label or specification-driven build.
As the manufacturer, FB-LINK accepts buyer specifications for private-label GPON OLT production — your branding, packaging, and firmware configuration on standard 4, 8, or 16 PON platforms. Because the design and production sit in-house, custom requirements are handled at source rather than passed through a trading intermediary.
Standard units are held in stock, and free samples are available so you can validate hardware, management, and ONU interoperability in your own lab before committing to a bulk order. Confirming the split ratio, power budget class, and uplink you need at the sample stage prevents costly respecification during volume production.
The concern with any new OLT supplier is integration risk — whether the terminal will authenticate your existing ONUs, slot into your management stack, and match your optical budget. FB-LINK addresses this directly: the platform's ITU-T G.984.x conformance governs ONU authentication, its CLI/Web/SNMP/NETCONF interfaces map to standard OSS tooling, and Class B+ or C+ optics can be specified to match your splitter architecture. Validate all three on a sample unit, then scale the order.
Trust in access equipment comes from the standards it implements. These are the specifications the platform is built to — and what each one means for your deployment.
The G.984 series defines the GPON physical layer, framing, and management. Conformance is what lets the OLT interoperate with third-party ONUs and ONTs, so you are not locked to a single terminal vendor across the network lifecycle.
ITU-T G.984.x
Governs Ethernet-based access and OAM over the fiber link. It underpins the multi-service delivery — data, voice, and video — that operators run over a single GPON strand.
IEEE 802.3ah
These technical reports define how GPON integrates into broadband access and TR-069-managed service delivery, guaranteeing the OLT fits recognized management and provisioning frameworks rather than a proprietary silo.
TR-156 TR-167
Class B+ and C+ define the loss budget the GPON link can tolerate. Matching the class to your split ratio and fiber distance is what keeps subscribers in-spec at the far end of the ODN — specify it per project at quotation.
Class B+ / C+
Direct answers to the questions procurement teams ask before a first order.
How many subscribers can one GPON OLT support?
Each PON port serves up to 128 subscribers through passive optical splitters. That means the 4PON model scales to roughly 512 subscribers, the 8PON model to around 1,024, and the 16PON model to as many as 2,048, depending on the split ratio you choose between 1:16 and 1:128.
What is the difference between the 4, 8, and 16 PON models?
They share the same 2.5G downstream / 1.25G upstream line rate, 20 km reach, and CLI/Web/SNMP management. The difference is PON port count, and therefore subscriber capacity: 4, 8, or 16 ports. Choose the density that matches your subscriber count now with headroom for planned growth.
Are FB-LINK GPON OLTs compatible with third-party ONUs?
Yes. The platform is built to the ITU-T G.984.x GPON standard, which governs ONU authentication and the point-to-multipoint link. Standards-compliant ONUs and ONTs can be provisioned against the OLT, so you are not restricted to a single ONU vendor. Validating your specific ONU on a sample unit is recommended before volume rollout.
Which uplink and management interfaces are supported?
Uplink options cover 10GE, 40GE, and 100GE interfaces depending on the platform configuration. Management is available through CLI for scripted provisioning, a Web interface for daily operations, SNMP for NMS integration, plus NETCONF and open APIs for automated provisioning.
Do you offer OEM, ODM, and private-label GPON OLT?
Yes. As the manufacturer, FB-LINK accepts buyer specifications for private-label builds with custom branding, packaging, and firmware on the standard 4/8/16 PON platforms. Free samples from stock let you verify the customized unit before placing a bulk order.
How do I choose the right optical power budget class?
Match the GPON class to your splitter ratio and fiber distance. Class B+ suits standard split ratios and typical FTTH distances, while Class C+ provides additional loss budget for higher splits or longer reaches approaching the 20 km limit. Specify the class per project so the link stays in-spec at the last subscriber.
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