• PoE
  • 8-Port Gigabit Ethernet 802.3af/at PoE Switch, 4x SFP

MikroTik CRS112-8P-4S-IN 8-Port Gigabit Ethernet 802.3af/at PoE Switch, 4x SFP

8-Port Gigabit Ethernet 802.3af/at PoE Switch, 4x SFP

8x Gigabit Ethernet Smart Switch with PoE-out, 4x SFP cages, 400MHz CPU, 128MB RAM, desktop case, RouterOS L5
 

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The MikroTik CRS112-8P-4S-IN is a compact, fully managed Gigabit PoE switch designed for powering access points, IP cameras, VoIP phones and other network devices. It combines eight Gigabit Ethernet PoE-out ports with four independent 1Gbps SFP slots, providing flexible copper and fibre connectivity for business networks, surveillance systems and distributed installations. Powered by MikroTik RouterOS, it offers extensive switching, traffic management, monitoring and network configuration capabilities.

Eight Gigabit Ethernet ports with PoE output

All eight 10/100/1000Mbps Ethernet ports support PoE-out, allowing compatible devices to receive data and electrical power over a single network cable. The CRS112-8P-4S-IN supports both passive PoE and standards-based IEEE 802.3af/at PoE, depending on the power supply connected to the switch.

The included 28V power adapter supports low-voltage passive PoE output. To power standard 802.3af/at PoE and PoE+ devices, a suitable 48–57V DC power supply is required and sold separately. The switch automatically detects compatible 802.3af/at powered devices when operating from the appropriate high-voltage input.

Four SFP ports for Gigabit fibre connectivity

Four independent 1Gbps SFP slots provide flexible fibre-optic uplink and network expansion options. These ports can be used to connect remote buildings, network cabinets, servers or core switches over multimode or single-mode fibre using compatible SFP transceivers.

Unlike combo ports, all eight Gigabit Ethernet interfaces and four SFP interfaces can operate independently, giving the switch a total of 12 usable switching ports.

Managed networking with MikroTik RouterOS

The MikroTik CRS112-8P-4S-IN runs RouterOS with a Level 5 licence, providing considerably more management flexibility than a basic unmanaged PoE switch. RouterOS supports advanced switching and network functions including VLAN configuration, port isolation, access control, traffic filtering, bandwidth management, link monitoring and diagnostic tools.

The switch can be managed through MikroTik WinBox, WebFig or the command-line interface. An RJ45 serial console port is also provided for direct administration and troubleshooting.

Flexible dual-voltage power inputs

Two DC input sockets support different voltage ranges:

  • 18–28V DC for low-voltage passive PoE output

  • 48–57V DC for IEEE 802.3af/at PoE and high-voltage passive PoE output

The CRS112-8P-4S-IN can accept power through either or both inputs. Its total PoE output capacity is up to 2.8A when operating from an 18–28V source or 1.4A when using a 48–57V source. Actual available power depends on the input voltage, power-supply capacity and requirements of connected devices.

Silent, compact and versatile installation

Passive cooling enables completely silent operation without fans, making the switch suitable for offices, communications cabinets and other noise-sensitive environments. Its compact metal enclosure can be placed on a desktop or installed in a rack using the included mounting hardware.

Key features

  • Eight 10/100/1000Mbps Gigabit Ethernet ports

  • PoE output available on all eight Ethernet ports

  • IEEE 802.3af/at PoE support with a suitable 48–57V power supply

  • Low-voltage and high-voltage passive PoE support

  • Four independent 1Gbps SFP slots

  • 12 independently usable switching interfaces

  • MikroTik RouterOS with Level 5 licence

  • VLAN, traffic management and network monitoring capabilities

  • WinBox, WebFig, CLI and serial-console management

  • Dual DC power inputs

  • Fanless passive cooling for silent operation

  • Compact desktop, wall-mount or rack-mount design

  • 28V 3.4A power adapter and rack-mount hardware included

Technical specifications

Specification Details
Manufacturer MikroTik
Product code CRS112-8P-4S-IN
Product type Managed Gigabit PoE switch
Ethernet interfaces 8 × 10/100/1000Mbps RJ45
PoE-out ports Ether1–Ether8
PoE standards IEEE 802.3af/at and passive PoE
PoE wiring Mode B: pins 4,5 positive and 7,8 negative
Low-voltage PoE current limit 1A per port
High-voltage PoE current limit 450mA per port
Maximum total PoE output 2.8A at 18–28V; 1.4A at 48–57V
Fibre interfaces 4 × 1Gbps SFP slots
SFP modules Sold separately
Switch chip Qualcomm Atheros QCA8511
CPU QCA8511, single-core
CPU architecture MIPSBE
CPU frequency 400MHz
Memory 128MB RAM
Storage 16MB flash
Operating system MikroTik RouterOS
RouterOS licence Level 5
Management interfaces WinBox, WebFig, CLI and RJ45 serial console
DC inputs 2 × DC jack
Input voltage 18–28V DC and 48–57V DC
Maximum power consumption 160W including attached PoE devices
Power consumption without attachments 10W
Included power supply 28V 3.4A adapter
Cooling Passive, fanless
Temperature monitoring PCB temperature monitor
Dimensions 200 × 142 × 44mm
Operating temperature -20°C to +60°C
Ingress protection IP20
Installation environment Indoor
Certifications CE, EAC and RoHS

Important PoE power-supply note

The included 28V 3.4A adapter is intended for powering the switch and compatible low-voltage passive PoE devices. A separate 48–57V DC power supply is required to operate standard IEEE 802.3af/at PoE devices. Before deployment, the total power requirements and supported input voltage of every connected device should be checked.