Rethinking Connectivity: How MikroTik’s GPEN Stacks Up Against Fiber’s GPON

Fiber’s Gigabit Passive Optical Network (GPON) has long been the gold standard for delivering high-speed internet over long distances. However, MikroTik has introduced an appealing alternative in the form of Gigabit Passive Ethernet Network (GPEN). This solution cleverly uses copper Ethernet cables—rather than fiber—to deliver robust, high-speed connections without the complexity and cost often associated with full-fiber installations. Below, we explore the key benefits of GPEN over GPON and why you might consider it for your next deployment.

1. Price Advantages

One of the most significant benefits of GPEN lies in its cost-effectiveness. Installing fiber across multiple sites can be prohibitively expensive due to:

• Specialized Skill Requirements: Fiber splicing and handling require advanced expertise and tools, such as splicing machines.
• High Labor Costs: Longer installation times increase labor expenses.
• Maintenance Complexities: Fiber systems can require specialized knowledge for troubleshooting and repairs.

With GPEN, using copper instead of fiber for the "last mile" reduces complexity, shortens installation time, and eliminates the need for costly equipment. This makes it a practical solution for ISPs and businesses looking to streamline their deployments.

2. Consistent Performance

GPON systems advertise impressive bandwidth, typically offering 2.5Gbps downstream and 1.25Gbps upstream per PON. However, these speeds are shared across multiple subscribers, meaning performance can degrade during peak usage times.

• Active Ethernet Benefit: In contrast, MikroTik’s GPEN is an active Ethernet solution,  providing each subscriber with a dedicated 1Gbps symmetrical link. This ensures consistent performance, particularly in high-demand scenarios like business-grade services or streaming-heavy networks. 

3. Easy Deployment

Fiber installations are often time-consuming, requiring advanced splicing techniques and specialized tools. GPEN simplifies the process by utilizing copper Ethernet cables, which are more robust and easier to handle—especially in tight spaces or when routing around obstacles.

• Extended Reach with GPER: Traditional Ethernet connections max out at 100m for full Gigabit speeds, but MikroTik’s GPER (Gigabit Passive Ethernet Repeater) extends this range to 1.5km using increments of 210m. Additionally, GPER supports PoE, making it possible to power remote devices even in areas without convenient power access. 

4. Reverse PoE for Robust Power

Most are familiar with standard PoE, where power is supplied to devices like cameras or access points from a central switch. MikroTik’s Reverse PoE flips this concept, allowing power to flow from multiple end devices back to the switch.

• Lockable PoE Injector: In a GPEN setup, customer premises equipment (such as the RB-GPEN21) acts as a lockable PoE injector, sending power back to a netPower Reverse PoE switch. This innovative design creates a cleaner, more flexible installation, with the end-user gaining access to the network via Ethernet or fiber (SFP) from the same GPEN unit.

5. Versatile Functionality

One of GPEN’s most attractive features is its flexibility. When paired with MikroTik’s full ecosystem, the possibilities for customization and optimization grow exponentially:

• Choice of Software: netPower switches can run either RouterOS or SwOS, letting you select the software that best meets your needs—whether it’s advanced routing capabilities or straightforward switching functionality.
• Client-Side Intelligence: Customer-side units like the RB-GPEN21 can monitor bandwidth usage, apply policies, or troubleshoot locally without additional routers or complex management hardware.

This versatility makes GPEN deployments both efficient and user-friendly.

Real-World Example: MikroTik netPower

A great example of the GPEN concept in action is MikroTik’s netPower 15FR (CRS318-1Fi-15Fr-2S-OUT)—a versatile outdoor switch specifically designed for multi-dwelling units or small buildings. Its standout features include:

• Reverse PoE Ports: With 15 Reverse PoE Ethernet ports, this switch allows connected devices to power the unit, eliminating the need for direct power sources at the installation site.
• Dual SFP Ports: Two SFP ports enable fiber uplinks, providing high-speed backbone connections for extended network scalability.
• Rugged Enclosure: Built to withstand harsh environments, the CRS318-1Fi-15Fr-2S-OUT is ideal for challenging installations in attics, basements, or elevator shafts.

By incorporating the netPower 15FR (CRS318-1Fi-15Fr-2S-OUT) in to your GPEN network, you can deliver reliable, high-speed connectivity to individual apartments or offices while significantly reducing the need for expensive GPON infrastructure, such as optical splitters or base stations. Its Reverse PoE design makes it an efficient solution for modern multi-dwelling deployments.

Is GPEN Right for You?

While GPEN doesn’t replace fiber in every scenario—especially for runs exceeding 1.5km or aggregate bandwidth above 10Gbps—it shines in small to medium deployments and “last-mile” connectivity. Consider GPEN if:

• Cost and simplicity are priorities for your rollout.
• Symmetrical speeds of 1Gbps are sufficient for your needs.
• You value modular setups with reverse powering and easy device management.

Final Thoughts

MikroTik’s GPEN concept is a game-changer for network providers and businesses seeking reliable, scalable, and cost-effective solutions. By eliminating many of the complexities associated with fiber installations, GPEN makes high-speed connectivity more accessible without compromising performance.

Whether you’re an ISP rolling out service to a new area, a business upgrading your network infrastructure, or a property owner looking for an affordable alternative to GPON, GPEN offers a compelling solution.

Ready to learn more about GPEN? Check out MikroTik’s comprehensive product demos—such as the netPower Lite 7R—and dive into their detailed documentation. At Flytec Computers, we’re here to help you navigate these options and find the ideal networking solution for your environment.

Got questions? Contact us today, and let’s create the high-performance network you’ve been dreaming of!