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Before you work on any equipment, be aware of the hazards involved with electrical circuitry, and be familiar with standard practices for preventing accidents.
Ultimate disposal of this product should be handled according to all national laws and regulations.
The Installation of the equipment must comply with local and national electrical codes.
This unit is intended to be installed in the rackmount. Please read the mounting instructions carefully before beginning installation. Failure to use the correct hardware or to follow the correct procedures could result in a hazardous situation to for people and damage to the system.
This product is intended to be installed indoors. Keep this product away from water, fire, humidity, or hot environments.
Use only the power supply and accessories approved by the manufacturer, and which can be found in the original packaging of this product.
Read the installation instructions before connecting the system to the power source.
We cannot guarantee that no accidents or damage will occur due to the improper use of the device. Please use this product with care and operate at your own risk!
In the case of device failure, please disconnect it from power. The fastest way to do so is by unplugging the power plug from the power outlet.
It is the customer's responsibility to follow local country regulations, including operation within legal frequency channels, output power, cabling requirements, and Dynamic Frequency Selection (DFS) requirements. All Mikrotik devices must be professionally installed.

Quick start

• Mount the unit in a rackmount cabinet or place it on the a flat surface (see "Mounting").
• Connect two powering units to the AC source using power cords.
• The Initial connection has to be done via the Ethernet cable, using the MikroTik Winbox utility.
• Use Winbox to connect to the default IP address of 192.168.88.1 from any port, with the username admin and no password.
• Update the device by clicking the "Check for updates" button to v6.46 or the latest RouterOS software to ensure the best performance and stability. The device needs to have an active internet connection.
• To manually update the device, go to our download page https://mikrotik.com/download
• Choose your architecture (ARM) and download the latest packages from any channel to your PC.
• Open Winbox and upload packages in the Files menu.
• Reboot the device.
• Updating software will ensure the latest security fixes and regulations set by local law.
• Set up your password to secure the device.

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• From SwOS: In the System menu, click the "Boot RouterOS" button on at the bottom of the page.
• From RouterOS: in the System, RouterBOARD menu, click "Settings" and there select "Boot OS".

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Full RouterOS and SwOS documentation is located here: https://mt.lv/help
This device is not preconfigured other than an IP address on the bridge interface. You can connect from any port, as all ports are switched together by default. Another configuration has to be applied according to the documentation manual linked above.
The Initial connection has to be done via the Ethernet cable, using the MikroTik WinBox utility. WinBox should be used to connect to the default IP address of 192.168.88.1 from any port, with the username admin and no password.
For recovery purposes, it is possible to boot the device for reinstallation, see Buttons and jumpers.
In case the IP connection is not available, the WinBox utility can also be used to connect to the MAC address of the device. Applies only when the device has booted RouterOS.
The device is equipped with an RJ45 serial port, set by default to 115200 bit/s, 8 data bits, 1 stop bit, and no parity. Standard RJ45 to COM cable can be used, pinout can be found here: https://mt.lv/console

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• 20 SFP ports.
• 4 SFP+ ports, which accept both 1.25 Gb SFP and 10 Gb SFP+ modules.
• 4 combo ports, consisting of four twisted pair (T) sockets and four SFP sockets (F).
• RJ45 serial port.

Please visit the wiki pages for the MikroTik SFP module compatibility table: https://wiki.mikrotik.com/wiki/MikroTik_SFP_module_compatibility_table

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The four combo interfaces each have two physical connectors of which the only one can be used at the same time. The ports will be automatically represented as combo1-4 in the RouterOS. It is possible to select which physical port will be used in the RouterOS software Ethernet menu. If left to default "auto", and both F/T have cables plugged in, SFP will take priority. For example, if you have plugged an Ethernet cable into the 1T port and an SFP module in the 1F port, you will have to choose in RouterOS which one to use. Double click the respective combo interface in RouterOS GUI to see which socket is used.

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The device is designed to use indoors and it can be mounted in a rackmount enclosure using provided rack mounts, or it can be placed on the desktop. Please attach rubber pegs on the bottom of the router if the desired placement is on the flat surface or use a Phillips screwdriver to attach rackmount ears on both sides of the device if the designated use is for rackmount enclosure:

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The IP rating scale for this device is IPX0. The device has no protection from water contamination, please ensure the placement of the device in a dry and ventilated environment.
Mounting The mounting and configuration of this device should be done by a qualified person. We recommend using Cat6 cables for our devices.

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• Hold this button during boot time until the LED light starts flashing, release the button to reset RouterOS configuration (total 5 seconds).
• Keep holding the button for 5 more seconds until LED turns off, then release it to make the RouterBOARD look for Netinstall servers (total of 15 seconds). The first Ethernet port (combo-ether1) is used for the Netinstall process. See RouterOS documentation about using the Netinstall recovery utility.

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For more information about this product, specifications, pictures, downloads, and test results please visit our web page: https://mikrotik.com/product/crs328_4c_20s_4s_rm

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