In recent years, domestic operators have effectively supplemented WLAN networks alongside 3G infrastructure in high-traffic areas such as airports, luxury hotels, commercial buildings, and university campuses, driving rapid development of WLAN technology in China. A reliable power supply for access points (APs) is crucial to ensuring the security and stable operation of these devices. Currently, APs are powered through traditional methods, dedicated power supplies, or Power over Ethernet (PoE). Among these, PoE switch-based power supply has become the preferred solution due to its efficiency and scalability.
Traditional AP power supply methods, such as using wall adapters, often pose safety risks, especially when APs are installed in hard-to-reach locations like ceilings, corridor walls, or outdoor spaces. In such cases, extending power from a 220V socket can be both inconvenient and unsafe. Moreover, the power supply is often unreliable, as it depends on business hours, leading to issues like short circuits during off-hours or manual disconnections. These problems significantly impact the stability and maintenance of APs.
To address these challenges, operators should consider using professional power supplies or PoE for better reliability and manageability. However, deploying professional power sources is difficult due to location constraints, and it increases construction costs. PoE remote power supply, on the other hand, offers an efficient and scalable solution for powering APs in WLAN networks.
There are two main ways to power remote terminals via PoE: PoE module power supply and PoE switch power supply. While PoE modules offer flexibility, they introduce additional failure points. These modules must be independently powered, and once data and power are combined, they can become vulnerable to damage—especially during thunderstorms. This can lead to power outages for connected APs, making them less reliable than expected.
In contrast, PoE switches integrate the power supply function directly into the network switch, offering several advantages. First, they reduce costs by eliminating the need for separate power modules. Second, they simplify installation and management, as only one cable is needed for both data and power. Third, they enhance safety and reliability by minimizing local power risks and allowing precise control over power delivery.
With the growing adoption of 802.11n technology, which demands higher power levels for advanced APs, the limitations of the IEEE 802.3af standard (which provides up to 15.4W per port) are becoming apparent. To support 11n APs, which require more power, PoE+ is necessary. Leading manufacturers like Cisco and H3C already offer switches that support PoE+, ensuring compatibility with next-generation WLAN networks.
As 802.11n becomes more widespread, PoE+ switches will play a critical role in future WLAN deployments. The PoE switch power supply method is set to become the optimal solution for powering APs, offering a balance of performance, cost-effectiveness, and reliability.
Rice Transplanter Filter,Z Transform Filter,Agricultural Machinery Accessories,Transplanter Accessories
Changzhou Youeryou Trading Co., Ltd. , https://www.farmpartssupplier.com