20‑km Full‑Optical Coverage and 800‑meter Remote Power Supply: How Full‑Optical Networks Make Distance No Longer a Barrier

Campuses keep expanding in scale, yet network deployment grows increasingly challenging. Deep inside warehouses of logistics parks, camera signals cut in and out. Surveillance points outside campus perimeter walls have to be abandoned due to lack of power supply. When factory workshops are hundreds of meters apart, road excavation and construction approval are required just for laying network cables.

Two hard limitations of copper‑cable networks — the 100‑meter transmission limit and the 100‑meter PoE power‑supply limit — have become the biggest bottleneck for campus network construction.

I. Inherent Drawbacks of Copper Cables: Distance Constraints, Insufficient Power, Doubled Cabling Costs

Transmission distance: signal degrades sharply beyond 100 meters

Standard Ethernet copper cables have a hard transmission limit of 100 meters. Once exceeded, signal attenuation rises, packet loss increases, video freezes, and even complete disconnection occurs. To extend reach, intermediate switches must be deployed as repeaters. Every additional device introduces one more potential point of failure.

Perimeter walls of large‑scale campuses can stretch for hundreds of meters, logistics warehouses go one thousand meters deep, and the distance from campus remote hill‑side areas to equipment rooms may span several kilometers. Copper‑based solutions can only cope by stacking extra hardware, resulting in high capital expenditure and extremely complicated later‑stage maintenance.

Power‑supply distance: devices suffer insufficient power when PoE exceeds 100 meters

Standard PoE is also capped at 100 meters. Beyond this range, severe voltage drop causes camera black‑outs and insufficient AP transmit power leading to poor wireless coverage. To power remote endpoints, administrators must either insert PoE intermediate switches (adding another failure point) or run separate 220 V high‑voltage power lines, which are costly and carry safety hazards.

Separate data‑power cabling: doubled construction cost

Copper‑cable deployments use Ethernet cables for data and separate power cords for electricity. Dual cable runs mean two rounds of construction and double overall costs. For large campuses, cabling projects take longer, cable ducts in weak‑current cabinets become overcrowded, and maintenance complexity rises significantly.

II. How Full‑Optical Networks Break the 100‑meter Barrier

AINOPOL full‑optical networks fundamentally redefine distance limits from two dimensions: signal coverage and remote power delivery.

20‑kilometer full‑optical coverage: one fiber runs from equipment room to the far end of the campus

Fiber performance far outperforms copper in transmission distance. The AINOPOL PON full‑optical solution adopts single‑mode fiber, supporting passive backbone transmission up to 20 km, with no intermediate switching repeaters required for far‑flung sites.

Two‑tier flat architecture

Traditional three‑tier networks (core‑aggregation‑access) require active hardware at every layer. AINOPOL full‑optical networks employ a streamlined two‑tier flat architecture: OLT → Optical Splitter → ONU.

Optical fiber boasts a service life of up to 30 years. Distance is no longer an obstacle, while overall system reliability is greatly improved.

III. 800‑meter Remote Power Supply via POF Photo‑Electric Composite Cable: Extending Power Reach from 100 m to 800 m

Extended signal coverage is achieved — but how about power supply? AINOPOL POF photo‑electric composite cable delivers the answer.

One cable fulfils two functions: simultaneous data transmission and power delivery

The POF photo‑electric composite cable integrates optical fibers and power‑carrying copper conductors within a single sheath. Fibers transmit data, while copper cores deliver power. One cable replaces the conventional dual setup of “Ethernet cable plus power cord”.

General‑use scenario: 300 m @ 60 W, suitable for campus perimeter surveillance, factory cameras, outdoor APs and other high‑power endpoints.

Extreme long‑reach scenario: 800 m @ 15 W, supporting remote deployment of security cameras, RFID scanners and various sensors.

800‑meter repeater‑free direct connection, cutting intermediate devices by 60%

Legacy setups require power supply repeater boxes every 100 meters; more hardware brings more failure risks. The POF solution enables 800‑meter direct runs without any intermediate active devices, reducing failure nodes by 60%.

48 V low‑voltage power supply for enhanced electric‑shock safety

The equipment room centrally outputs safe 48 V low‑voltage power for end‑to‑end low‑voltage distribution. No local 220 V high‑voltage outlets are needed at remote sites, eliminating leakage and fire risks.

Leveraging single‑mode fiber for repeater‑free data transmission up to 20 km, and paired with photo‑electric composite cables for ultra‑long‑distance power delivery, the AINOPOL full‑optical solution merges data transfer and low‑voltage power supply inside one cable. It eliminates redundant multi‑duct cabling work and cuts the number of intermediate active failure points.

Well‑suited for wide‑area sites such as large logistics parks, manufacturing plants and university campuses, the solution extends network footprint, optimizes cabling and construction expenses, and lowers risks of line faults and electrical hazards.

FAQ

Q: What does “20‑km coverage” mean in practical terms?

A: Most campuses measure no more than 2‑3 km across their furthest points. Twenty‑kilometer reach means a single fiber can run directly from the central equipment room to the remotest corners of a campus without intermediate switching hardware. Even extra‑large logistics parks and multi‑site industrial manufacturing complexes can be fully covered by one backbone fiber.

Q: What differentiates POF photo‑electric composite cable from ordinary optical fiber?

A: Standard optical fiber carries only data, so terminal devices require separate power cords. POF photo‑electric composite cable embeds both optical fibers (for data) and copper conductors (for power supply) inside one cable sheath. One single cable solves two requirements, removing the need for dual independent cabling systems.