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Enhancing Upgradability in POL Networks

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Upgradability of POL Networks

In traditional structured cabling systems, the network lifespan is about 10-15 years, and as the system is gradually phased out during use, the rapid development and popularization of smart buildings and the Internet of Things (IoT) force us to reassess the sustainability of network construction. Future terminal access devices will grow exponentially, creating tremendous bandwidth pressure. Traditional structured cabling has to shorten the network reconstruction or renovation cycle, leading to severe resource consumption. The all-optical network (POL) can provide bandwidth and speeds of GPON, 10GPON, and future 50GPON/100GPON, allowing smooth upgrades. This extends the network lifespan of campuses and buildings exponentially, ensuring the network's usability while maintaining its foresight.

The speed of equipment iteration is a major issue in network construction. Old equipment often has to be discarded, causing significant asset waste. However, the all-optical network, based on optical fiber networking, can meet various broadband needs within a campus. For instance, the currently popular Wi-Fi 6 business requires 2.5Gbps or 10Gbps business interfaces, which can be easily handled by 10G PON solutions or 50G PON upstream bandwidth. Upgrading the all-optical network requires only replacing the cards or even just the optical modules. Additionally, optical fibers have properties like corrosion resistance, high and low-temperature resistance, and anti-interference. The service life of POL all-optical networks can reach 30 years, optimizing the investment cost over the network's entire lifecycle.

High Reliability of POL Networks

POL adopts the PON architecture, with the OLT deployed in the core equipment room. From the core equipment room to the user, the intermediate layer uses passive splitters, eliminating the need for independent equipment room deployment and power supply, reducing failure points of intermediate active equipment. The ONU is close to the user, connected via copper cables. POL all-optical networks are widely used in various scenarios such as medium and large enterprises, government agencies, technology parks/industrial parks, schools, hospitals, and other environments requiring local area/local broadband networking. The network structure varies according to business needs and networking scale.

POL ensures continuous network availability through various networking methods, as shown in the diagram below:


Security Protection of POL Networks

POL networks effectively avoid issues like electromagnetic interference and electromagnetic leakage. They support AES128 encryption, ensuring secure data transmission over optical fibers. POL equipment supports MAC binding, 802.1x authentication, user isolation, broadcast suppression, and DoS attack prevention, effectively preventing unauthorized access and other user attacks.

  • Supports port and ONU isolation functions.

  • Supports MAC filtering.

  • Supports DoS attack prevention.

  • Supports user hierarchy to prevent unauthorized user intrusion.

  • Supports port broadcast/multicast packet suppression.

  • Supports flow classification and flow definition based on source/destination MAC address, VLAN, 802.1p, ToS, DiffServ, source/destination IP (IPv4/IPv6) address, TCP/UDP port number, protocol type, and other IP packet header information.

  • Supports L2-L7 ACL flow classification for up to 80 bytes of the packet header.

  • Supports business flow policies, including mirroring, redirection, statistics, filtering.


The POL network is a future-proof solution that not only meets the current demands for high-speed, high-bandwidth networking but also ensures long-term sustainability and cost-efficiency. By adopting POL, organizations can significantly extend their network's lifespan, reduce the frequency and cost of upgrades, and enhance overall network reliability and security.

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