For buying gigabit PoE switch, we usually concern about port numbers. However, power consumption is often linked with port number to cater for different wattage requirement. Say small PoE switch 8 port may come with 130W or 250W for option. High port-density 48 port PoE switch may be available for up to 600W or even higher. A midsize 24 port PoE switch with appropriate power consumption will be a feasible solution for wide network applications. Since a power over Ethernet switch failing to provide enough power for Powered devices (PDs) leads to low performance or random drops. On the other hand, for cost-effective concern taking a 24 PoE switch with superfluous power budget will waste money. This article will introduce PoE switch power consumption and recommend 2 24 port PoE switch with different power consumption: 400W vs 600W for your reference.
Power consumption of 24 port PoE managed switch refers to the max. total power the gigabit PoE switch enables to supply to all the PDs connected to it. That is, the total power wattage of all the connected PDs cannot exceed the power consumption of the 24 port PoE switch. So before deciding on how much a power consumption of PoE switch to buy, one must calculate the total power wattage of the PoE powered devices required to be used.
Another indispensable parameter of 24 PoE switch is the per PoE port power consumption, which is defined by PoE standard (IEEE802.3af) or PoE+ standard (IEEE802.3at). The PoE compliant switch supports up to 15.4W per port output power, while 12.95W input power is available for a PD due to transmission loss. Similarly the corresponding data of a PoE+ switch is 30W and 25.5W.
Figure 1: 24 port PoE switch power consumption PoE vs PoE+ standard comparison.
24 port PoE switch 400W vs 600W power consumption apply to different level power wattage. Taking S1400-24T4F 400W and S1600-24T4F 600W PoE switch 24 port as example, let’s compare the scenario when fully load these two 24 port PoE gigabit switches with IP cameras. Divide 400W and 600W by 24 respectively, we get 16.67W and 25W per port power, which means the 600W over 400W power consumption 24 port PoE+ switch can support 24 higher-power IP cameras. The suggestion is: If you should use dozens of higher-power PDs, the 24 port PoE switch 600W would be a more secure and future-proofing choice.
Figure 2: FS 24 port PoE switch power consumption 400W vs 600W model comparison.
Here we recommend the aforesaid advanced FS 24 PoE switches S1400-24T4F 400W and S1600-24T4F 600W for your reference. Compliant with IEEE 802.3af/at, these 24 port PoE gigabit switches can discern whether the PD is PoE or PoE+ standard for accurate power supply. This means FS 24 port PoE switch can supply up to 30W per port power, making it a natural fit for IP cameras, VoIP phones and wireless access points (APs).
In addition to high power consumption PoE capability, FS 24 port PoE managed switch features multiple port configuration to fit throughout different networks. The gigabit PoE switch centralizes 24 RJ45 auto-sensing 10/100/1000Mb PoE ports, 2 1Gb SFP ports and 2 SFP/RJ45 combo ports in a compact of 1RU form factor. The 24 PoE ports support up to 24 PDs simultaneously connected to the 24 port PoE switch within budget. The 2 SFP ports ensure optional fiber cabling and link aggregation of multiple switches, while the 2 SFP/RJ45 combo ports enhance network resiliency once again. In total one can enjoy a max. 1GbE density of 28 ports.
Figure 3: Deploying 24 port PoE switch S1400-24T4F 400W and S1600-24T4F 600W for desktops, APs, IP cameras and IP phones in data center.
Power consumption is an important specification for choosing a good but cheap PoE switch. For choosing 400W vs 600W PoE switch 24 port, one should first figure out each PD’s rated wattage as well as all the devices’ total power budget. Then make sure a single IP phone won’t exceed the per port power consumption of the 24 port PoE switch, and the total wattage won’t exceed the max. power threshold of the 24 PoE switch. If S1400-24T4F 400W is not enough for current applications or future AP proliferation, then go for S1600-24T4F 600W model. All in all, whatever you choose, 24 port PoE switch price in FS.COM will always be competitive in the market.
Since the introduce of Power over Ethernet (PoE) technology, PoE LAN switch has become popular among wide users. However, newbies are usually confused with the multiple port configuration on gigabit PoE switch. Since there are already regular PoE Ethernet ports for powered devices (PDs), what are the function of other ports like console port, SFP/SFP+ port and combo port on gigabit PoE switch? This article will take 8 port PoE switch, 24 port PoE switch and 48 port PoE switch as example to illustrate multiple port for your reference.
Like regular Ethernet switch, gigabit PoE switch often has one built-in serial console port, say FS S1130-8T2F 8 port PoE switch. It is the port for controlling and managing switch since there are no display device for a switch. Usually console port on gigabit PoE switch is an RJ45 receptacle. To connect a computer directly to the 8 port PoE switch, one should use dedicated rollover cable rather than Ethernet cable for connection.To use console port, you need physical access to the appliance. Therefore for terminals without serial console port, one should attach a corresponding adapter to the devices before cabling.
Figure 1: A display of one console port on FS S1130-8T2F 8 port PoE switch for control.
RJ45 port on gigabit PoE switch is the regular PoE port to achieve data and DC power transmission for PDs. It is an auto-sensing 10/100/1000Mb copper port supporting only Ethernet cable (Cat5e/6/6a/7) for connection. Thus RJ45 port connection is limited to 1G speed and 100m (330ft) short distance transmission. Then how about longer distance transmission scenario?
Different from RJ45 port, SFP port on gigabit PoE switch has the opt of both short and long reach. Why? The mini GBIC port has inherited the compatibility of either copper or optical SFP connection. Provided you employ the corresponding SFP module and cable on power over Ethernet switch. For long distance transmission, you should use fiber SFP modules with fiber patch cable for optical link. For short distance, you can opt to use RJ45 SFP module with copper network cable on gigabit PoE RJ45 switch for electrical link. Gigabit PoE switch often provides 2 SFP port for optical connection or uplink aggregation requirement, which enhances network adaption resiliency of PoE powered switch. For instance, S1400-24T4F 24 port PoE switch has 2 SFP ports reserved, which caters for fiber uplink to upper layer switch.
Figure 2: A display of RJ45 ports vs SFP ports on FS gigabit PoE switch.
To illustrate SFP+ port on PoE Ethernet switch, we’ll take S1600-48T4S 48 port PoE switch as example. This 48 port PoE gigabit switch comes with 1 console port, 48 PoE+ RJ45 ports and 4 SFP+ ports. The 48 RJ45 ports are PoE ready to power on dozens of VoIP phones, IP cameras and wireless APs. The 4 SFP+ ports on gigabit PoE switch serves as uplink to connect 10G SFP switch for uplink aggregation.
Figure 3: Deploying S1600-48T4S 48 port PoE switch as gigabit access switch to link 10G SFP switch via SFP+ ports, and connect PDs.
Though manufactures often clearly label combo ports on gigabit PoE switch for identification, many people don’t know its function. Take S1400-24T4F 24 port PoE switch as example, 2 combo ports are reserved on this 24 port PoE managed switch. The combo port compounds RJ45 and SFP front ends in one single interface, thus it supports either copper or optical SFP link. However, you cannot use these two physical accesses on PoE network switch simultaneously. That is, once you activate combo SFP port on gigabit PoE switch, you also disable the opposite copper port.
Figure 4: A demonstration of combo ports on gigabit PoE switch: S1400-24T4F 24 port PoE switch from FS.COM.
To sum up, multiple ports on gigabit PoE switch owns different functionality, which enhances switching resiliency for different network cabling. RJ45 port on PoE powered switch is an normal one for copper link to PDs. SFP port of gigabit PoE switch provides options of fiber cabling or copper cabling due to fiber SFP module and RJ45 SFP module compatibility. 10G SFP+ port on 48 port PoE switch serves as uplink port for link aggregation in network layer. Combo port compounds RJ45 and SFP interface in one single fabric on gigabit PoE switch. So it helps to extend flexibility of physical access through the network. For 8/24/48 port cheap PoE switch buying, you can find decent offer here with optimal port configuration.