CRS112-8P-4S-IN is an 8-Gigabit RJ45 port PoE switch that offers various power output options: autosensing 802.3af/at PoE/PoE+ and passive PoE. Four SFP ports provide fiber connectivity options to support uplinks of up to 1 Gbps.

A 28 V 3.4 A power supply is included in the box. On the back of the chassis, there is a secondary DC jack that supports a 48-57 V power supply (not included, can be purchased separately). CRS112-8P-4S-IN can power 802.3af/at devices when using a 48-57 V DC input (the device automatically detects and supplies the correct current to the devices). The maximum current is 1 A per port at an input voltage of 18-28 V and 450 mA at 48-57 V. The total limit is 2.8 A at 24 V and 1.4 A at 48-57 V. PoE-Out is delivered via Mode B pins 4,5 (+) and 7,8 (-).