The Huawei S1720 52GFR PWR 4P AC is a managed Ethernet switch that provides high performance, secure, and reliable network connectivity for small and medium sized businesses. Here's a breakdown of the key parameters mentioned:

1. 48 10/100/1000BASE T ports: This refers to the number of Ethernet ports on the switch that support three different speeds   10 Mbps (Ethernet), 100 Mbps (Fast Ethernet), and 1000 Mbps (Gigabit Ethernet). These ports are used for connecting devices such as computers, printers, or other network equipment.

2. 4 GE SFP ports: GE stands for Gigabit Ethernet, and SFP stands for Small Form factor Pluggable. These are high speed ports that allow for the use of SFP modules, which can be used for various types of network connections, including fiber optic. The "4" indicates that there are four such ports on the switch.

3. PoE+: PoE stands for Power over Ethernet. PoE+ is an enhanced version of PoE that provides more power (up to 30 watts) to devices connected to the switch, allowing for the powering of more demanding devices such as wireless access points, IP cameras, and other network devices that require more power than standard PoE can provide.

4. Fixed AC power: This indicates that the switch is powered by an AC power source and does not have a battery backup or DC power option. The "fixed" part means that the power supply is an integral part of the switch and cannot be easily replaced or upgraded.

5. AC: This stands for Alternating Current, which is the type of electrical power used in most commercial and residential settings. It contrasts with DC (Direct Current), which is used in some specialized applications.

In summary, the Huawei S1720 52GFR PWR 4P AC is a versatile managed switch with a mix of high speed Ethernet ports and SFP ports, capable of providing both data and power to connected devices, and is powered by a fixed AC power source.

Huawei S1720-28GWR-PWR-4TP-AC switch supports 24 10/100/1000BASE-T ports, 2 GE SFP ports, 2 dual-purpose 10/100/1000 or SFP ports, fixed AC power, PoE+：