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Frequently Asked Questions

1. What equipment is required to get started?

From a simple lab setup to a full deployment, there are required products and accessories for a functioning GPON network. They consists of an: Router, OLT, ONU, GPON SFP Module, SC/UPC to SC/APC single-mode fiber patch cable, PLC Splitter (either a 1:32 ratio or added attenuators), SC/APC to SC/APC single-mode fiber patch cable. For a full topology example, see our Getting Started and accessories article.

2. What is the difference between Active and Passive fiber?

Active fiber requires powered devices at the head end and end point as well as each connection or distribution point in the full path of the fiber.

Passive fiber allows for multiple connections across the same fiber strand using multiple splits with optical splitters such as a PLC splitter which does not use power at the location of the splitter, but requires power at the head end (OLT) and end point (ONU).

3. What is the difference between Class B+ and Class C+ modules?
The UFiber OLT includes a single UF-GP-B+ module in the package. Users can add more GPON SFP modules to populate the other PON ports. The advantage of using a C+ module over a B+ module is the added transmit power of the C+ modules which helps overcome attenuation to ensure there is an acceptable signal level at the ONU. For more details view our Designing a GPON Network article and the GPON Modules product page
4. Can I rate-limit customers using the OLT?
The recommended method of rate limiting traffic to customers is to use a router such as the EdgeRouter Infinity to apply QoS settings per VLAN or IP assigned to the client. This can easily be paired with UCRM to automatically provision the EdgeRouter with the service level assigned to the client. There are other ways to accomplish this such as simply setting the LAN port speed to 10, 100, or 1000Mbps on the ONU.
5. What third-party ONUs can I connect to the UFiber OLT?
The UFiber ONUs are the only supported ONU that is compatible with the UFiber OLT. Other third-party ONUs will not connect properly to the UFiber OLT.
6. What third-party OLTs can I connect to using the UFiber ONUs?
UFiber ONUs can connect to some third-party OLTs such as Huawei, Fiberhome, and ZTE. More details can be found here.
7. How far can my ONU be from my OLT?
The maximum distance from the OLT to the ONU is 20 km based on the attenuation caused by multiple sources. More details can be found in our Designing a GPON Network article.

Related Articles

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UFiber GPON - Getting Started

UFiber GPON - Accesories

UFiber GPON - Designing a GPON Network

UFiber GPON - Supported Third-Party OLTs