Netgear GS308P Installation Guide - Page 2

PoE Considerations The switch prioritizes the power that it supplies in ascending port order (from Port 1 to port 4), up to its total power budget (53 Watts). If the power requirements for the attached powered devices (PDs) exceed the total power budget of the switch, the PD on the highest numbered port is disabled to ensure that the PDs that are connected to the higher priority, lower numbered ports are supported first. Just because a PD is listed as an 802.3af PoE powered device does not necessarily mean that it requires the maximum power limit of the specification. Many PDs require less power, allowing all four PoE ports to be active simultaneously. The following table describes the PoE classes and switch allocations. 0 PoE and PoE+ Default power (full) 0.44W 1 PoE and PoE+ Very low power 4.0W 2 PoE and PoE+ Low power 7.0W 3 PoE and PoE+ Mid power 15.4W 4 PoE+ only High power 30.0W 0.44W-12.95W 0.44W-3.84W 3.84W-6.49W 6.49W-12.95W 12.95W-25.5W PoE Troubleshooting Here are some tips for correcting PoE problems that might occur: • Make sure that the PoE Max LED is off. If the PoE Max LED is solid amber, disconnect one or more PoE devices to prevent PoE oversubscription. Start by disconnecting the device from the highest numbered port. • Make sure that the Ethernet cables are plugged in correctly. For each powered device (PD) that is connected to the switch, the corresponding right port LED on the switch lights solid green. If the NETGEAR INT LTD Building 3 University Technology Centre Curraheen Road Cork Ireland right port LED lights solid amber, a PoE fault occurred and PoE halted because of one of the conditions that are listed in the following table. PoE Fault Condition Possible Solution A PoE-related short circuit occurred on the port. The PoE power demand of the PD exceeded the maximum level of 16.2W that the switch permits. The PoE current on the port exceeded the classification limit of the PD. The problem is most likely with the attached PD. Check the condition of the PD or restart the PD by disconnecting and reconnecting the PD. The PoE voltage of the port is outside the range Restart the switch to see if the that the switch permits. condition resolves itself. Specifications Specification Network interface Network cable Ports Power adapter Power consumption PoE power budget Weight Dimensions (W x D x H) Operating temperature Operating humidity Description RJ-45 connector for 10BASE-T, 100BASE-TX, or 1000BASE-T Category 5 (Cat 5) or better Ethernet cable 8 48V @ 1.25 A DC input 7.0W max. (no PoE) 60W max (with PoE) Ports 1-4: 15.4W maximum per PoE port, up to 53W total PoE power For more information, see PoE Specifications. 1.02 lb (0.46 kg) 6.2 in. x 4.0 in. x 1.1 in. (158 mm x 101 mm x 29 mm) 32-104°F (0-40°C) 10%-90% relative humidity, noncondensing Support Thank you for purchasing this NETGEAR product. You can visit www.netgear.com/support to register your product, get help, access the latest downloads and user manuals, and join our community. We recommend that you use only official NETGEAR support resources. Si ce produit est vendu au Canada, vous pouvez accéder à ce document en français canadien à http://downloadcenter.netgear.com/other/. (If this product is sold in Canada, you can access this document in CanadianFrench at http://downloadcenter.netgear.com/other/.) For the current EU Declaration of Conformity, visit http://support.netgear.com/app/answers/detail/a_id/11621/. For regulatory compliance information, visit http://www.netgear.com/about/regulatory/. See the regulatory compliance document before connecting the power supply. NETGEAR, Inc. 350 East Plumeria Drive San Jose, CA 95134, USA © NETGEAR, Inc., NETGEAR and the NETGEAR Logo are trademarks of NETGEAR, Inc. Any non‑NETGEAR trademarks are used for reference purposes only. January 2018