Fibre aggregation and flexible uplinks
MikroTik CRS328-4C-20S-4S+RM in Dubai, UAE
A 1U managed switch built for organisations that need a high concentration of 1 Gigabit fibre access ports, multiple 10 Gigabit uplinks and selectable copper-or-fibre connectivity at the network edge or aggregation layer.
Plan the correct bill of materials
Confirm fibre type, optic distance, connector format, uplink design and configuration scope before ordering.
Direct answer for buyers
The MikroTik CRS328-4C-20S-4S+RM is a 28-port managed switch intended primarily for fibre-based switching and aggregation. It offers twenty 1G SFP interfaces, four 10G SFP+ interfaces and four combo groups in which either the RJ45 or SFP side can be active. It is worth considering for ISP distribution, building networks, CCTV backbones, campus links and server-room aggregation where fibre density matters more than large numbers of fixed copper ports. Before proceeding, confirm the exact transceivers, fibre mode, distances, connector types, VLAN plan, uplink redundancy approach, rack power arrangement and whether RouterOS or SwitchOS best matches the operating team.
What this switch does
The CRS328-4C-20S-4S+RM concentrates multiple fibre links into a single rackmount switching platform. Twenty SFP cages can connect 1 Gigabit fibre circuits or compatible SFP-based media, while four SFP+ cages provide higher-speed 10 Gigabit connections for core switches, routers, servers or storage systems. The four combo groups add design flexibility because each group includes an RJ45 Gigabit Ethernet interface and an SFP cage, with one side of each pair selected for active use.
This port mix is useful when a network has many fibre-connected endpoints but still requires a small number of copper handoffs. It can reduce reliance on separate media converters, simplify rack layout and provide a central place to manage VLANs, link behaviour and switching policies. The correct value depends on a carefully planned optical bill of materials rather than the switch alone.
Who should consider it
The model may suit internet service providers, system integrators, hospitality groups, education campuses, multi-building offices, surveillance networks and enterprises operating fibre to remote cabinets or floors. It is also relevant where a distribution switch must support numerous 1G optical links and a smaller number of 10G upstream connections.
It is not automatically the right choice for every network. Businesses that mainly require copper access ports, Power over Ethernet for cameras or access points, or extensive high-speed Layer 3 routing should compare other models or a dedicated router. FourTeck can help determine whether this switch should be used as an access, distribution or aggregation device within the broader topology.
Business challenges and practical responses
Too many separate fibre converters
A dense SFP switch can centralise numerous optical handoffs, improving rack organisation and management. Compatibility still needs to be checked for every optic and fibre link.
Limited uplink capacity
Four 10G SFP+ cages provide options for higher-bandwidth uplinks, link aggregation or separate paths. Actual design depends on the connected equipment and traffic profile.
Mixed copper and fibre handoffs
Four combo groups allow the designer to choose RJ45 or SFP on each pair. Both sides of the same combo pair cannot be treated as independent active ports.
Different management preferences
Dual boot supports RouterOS or SwitchOS, allowing the operating team to select the environment that suits its switching and administration requirements.
Core capabilities that matter in fibre deployments
High-density 1G optical access
Twenty SFP ports provide a practical concentration point for fibre-connected cabinets, buildings, customer links or infrastructure devices. Optics are selected separately according to media type and distance.
10G aggregation paths
Four SFP+ cages can be used for 10G inter-switch links, server connectivity or upstream aggregation. Capacity planning should consider oversubscription and expected peak traffic.
Operating-system choice
RouterOS offers broader network configuration options, while SwitchOS provides a switch-focused interface. Feature support and operational preference should guide the selection.
Rack and power planning
The 1U chassis and dual AC inputs suit structured equipment rooms. Dual inputs improve power-feed planning but do not replace end-to-end redundancy design.
Product-fit matrix
| Requirement | Suitable when | Confirm before ordering |
|---|---|---|
| Dense fibre access | Many endpoints use 1G SFP links | Single-mode or multimode, distance and connector |
| Higher-speed uplinks | Up to four SFP+ paths are appropriate | 10G optic or DAC compatibility and peer ports |
| Mixed handoffs | Only a few copper links are required | Which side of each combo pair will be active |
| Managed switching | VLANs and controlled Layer 2 operation are needed | RouterOS versus SwitchOS and feature requirements |
| PoE endpoint powering | Not the primary use case for this model | Consider a PoE switch or separate injectors |
Verified technical information
| Brand | MikroTik |
|---|---|
| Model | CRS328-4C-20S-4S+RM |
| Product type | Managed rackmount switch |
| Architecture | ARM 32-bit |
| CPU / switch platform | 98DX3236, 800 MHz |
| Memory | 512 MB RAM, 16 MB flash storage |
| SFP ports | 20 × 1G SFP cages |
| SFP+ ports | 4 × 10G SFP+ cages; compatible module selection required |
| Combo ports | 4 groups, each offering Gigabit RJ45 or SFP selection |
| Console | RJ45 serial console |
| Operating system | RouterOS Level 5 or SwitchOS, dual boot |
| Form factor | 1U rackmount |
| Dimensions | 443 × 194 × 44 mm |
| Power inputs | Dual AC inputs |
| Tested ambient temperature | -20 °C to +60 °C |
| Availability | Contact FourTeck for current UAE options and lead time |
Compatibility and dependency notice
The switch chassis does not remove the need to engineer each link. SFP and SFP+ modules must match the fibre medium, wavelength, distance, connector, speed and equipment at the opposite end. Single-mode and multimode optics are not interchangeable simply because they fit the same cage. Bi-directional optics must also be purchased as complementary wavelength pairs. Direct-attach copper and active optical cables require compatibility checks with both connected devices.
The four combo groups deserve special attention. Each group has an RJ45 side and an SFP side, but the pair is a shared logical interface rather than two fully independent ports. Buyers should document which medium will be used in each group. Management features can vary between RouterOS and SwitchOS releases, and advanced behaviour may depend on current software support and correct hardware-offloaded configuration.
A practical purchase and deployment journey
Map every link
List endpoints, link speeds, fibre types, distances and peer devices. Separate 1G access requirements from 10G aggregation requirements.
Select optics
Choose compatible SFP or SFP+ modules, patch leads, couplers and fibre panels. Confirm environmental and distance needs.
Define switching policy
Prepare VLANs, trunks, access ports, link aggregation, loop protection and management addressing before installation.
Install and validate
Rack the unit, connect both power feeds where appropriate, test optics, confirm link negotiation and verify traffic paths.
Fibre density without losing operational clarity
A switch with many optical cages can simplify physical architecture, but it also raises the importance of documentation. Each link should be recorded with its source, destination, fibre strand, optic part number, wavelength, expected speed and purpose. This becomes especially important in buildings where fibres terminate in different cabinets or where service-provider circuits share the same rack.
The CRS328-4C-20S-4S+RM can provide a clean aggregation point for these links. Twenty 1G SFP ports support a substantial number of remote fibre connections, while four SFP+ cages create room for faster upstream paths. A buyer should still calculate aggregate demand. Twenty access links can collectively generate more traffic than a single 10G uplink can carry during simultaneous peaks. Multiple uplinks, traffic distribution or capacity controls may therefore be appropriate.
Good port naming and VLAN documentation are as important as the hardware. Configuration should identify building, floor, cabinet, customer or service on every interface. Where the switch is part of a managed environment, monitoring should include link state, errors, optical diagnostics where supported, temperature and power events. FourTeck can discuss configuration scope and documentation as part of the quotation.
Choosing between RouterOS and SwitchOS
Dual boot is useful because it allows the CRS328 to operate with either RouterOS or SwitchOS. The correct choice should be based on operational needs, team experience and the required feature set rather than the assumption that one interface is always better. SwitchOS is focused on switch administration and can be comfortable for teams that need a straightforward web-managed Layer 2 environment. RouterOS provides a broader configuration framework and can integrate the switch into MikroTik-oriented management and network designs.
Using RouterOS does not automatically make the switch a substitute for a high-performance edge router. The device is designed primarily around switching silicon, and CPU-processed workloads should be evaluated separately. For routing, firewalling or large volumes of services that cannot be hardware offloaded, a dedicated MikroTik CCR or another appropriate routing platform may be required. This separation helps preserve predictable switching operation and avoids asking an aggregation switch to perform tasks outside the intended design.
Before deployment, decide who will manage the device, how backups will be stored, how software updates will be approved and whether a staging test is required. Document the selected operating system so replacement and recovery procedures remain consistent.
Resilience through sensible topology design
The CRS328 includes dual AC power inputs, which can support connection to separate power sources or UPS feeds. This is valuable in a rack where power-path resilience is required, but it represents only one part of availability planning. A network can still fail because of a single upstream router, a single fibre path, an incorrect spanning-tree design, a failed optic or a shared distribution switch.
Where continuity is important, consider redundant uplinks, physically diverse fibre routes, link aggregation, loop-prevention protocols and a second switching path. The appropriate design depends on how rapidly the business must recover and whether connected devices support multiple links. Redundancy should be tested rather than assumed. Planned failure tests can verify that traffic moves to the intended path and that monitoring alerts are generated.
The four SFP+ cages provide useful options for core connectivity, but assigning all four to active uplinks is not always necessary. Some organisations may reserve a port for future growth, a server connection or an inter-switch link. A topology review helps ensure the port allocation supports the business requirement instead of simply using every available interface.
Ideal environments and use cases
Multi-building office networks
Fibre links from remote buildings or floors can terminate at a central distribution rack, with 10G uplinks connecting to the core or data centre.
Hospitality and residential properties
The switch may aggregate fibre-connected telecom rooms, service areas or remote cabinets where copper distance limits make optical cabling preferable.
Surveillance backbones
Remote PoE access switches can connect over fibre to this aggregation platform. PoE is supplied by the access switches, not by the CRS328 model.
ISP and managed-service distribution
Multiple customer or site links can be concentrated with VLAN separation and higher-speed upstream connectivity, subject to traffic and service design.
Education campuses
Faculty buildings, laboratories and administration blocks can be linked over fibre while keeping aggregation management in a central equipment room.
Server and storage connectivity
SFP+ ports may connect selected servers or storage systems where interface compatibility and traffic design are confirmed.
Integration and operational considerations
Integrating the switch begins with the surrounding network. Confirm whether the upstream environment uses tagged VLAN trunks, link aggregation, spanning tree, access-control policies or a dedicated management network. Port configuration should be prepared before migration so the engineering team does not make policy decisions under outage pressure.
Optical links need consistent cleanliness and handling. Dust caps should remain in place until installation, connectors should be inspected and cleaned appropriately, and patch leads should be routed without excessive bends. Incorrect optical power, contaminated connectors or mismatched wavelengths can produce intermittent faults that appear to be switch problems. A commissioning checklist should record received optical levels where diagnostics are available.
Management access should be restricted to approved networks and administrators. Change control, configuration backups, secure credentials and software maintenance should be part of the operational plan. Where the switch carries multiple tenants, departments or services, VLAN separation and administrative access require particular care. FourTeck can help scope configuration and handover documentation, but the final design should reflect the customer’s security and governance requirements.
Questions to resolve before requesting a quotation
Procurement checklist
✓ Exact CRS328-4C-20S-4S+RM model and quantity
✓ 1G SFP optic types and quantities
✓ 10G SFP+ optic, DAC or AOC requirements
✓ Fibre mode, wavelength, distance and connector
✓ Copper use within the four combo groups
✓ Rack space, airflow and rail or mounting needs
✓ AC feed and UPS arrangement
✓ RouterOS or SwitchOS preference
✓ VLAN, trunk and aggregation configuration
✓ Installation and migration scope
✓ Testing and handover documentation
✓ Current UAE lead-time confirmation
How FourTeck can assist
FourTeck can help translate a fibre topology into a clear procurement request. This may include reviewing port counts, distinguishing 1G and 10G requirements, identifying the information needed for optic selection and preparing a quotation that separates the switch, transceivers, patching and service scope. Buyers can also discuss rack installation, base configuration, VLAN implementation, migration coordination and post-installation support requirements.
The purpose of the consultation is to reduce avoidable mismatches. A switch may be correct while the selected optics are wrong for the fibre plant, or the optical modules may be correct while the uplink design is undersized. Sharing a simple network diagram, fibre schedule and expected traffic profile helps produce a more useful proposal. Visit the FourTeck technology products page for related infrastructure options, review available installation and configuration services, or contact the Dubai team with the bill of materials.
UAE availability and support guidance
Contact FourTeck to confirm current UAE availability for the MikroTik CRS328-4C-20S-4S+RM, compatible optics and any installation or configuration services. Availability may depend on quantity, vendor lead time and the exact optical accessories required. Delivery and project coordination can be discussed after the final requirement is documented. Buyers should avoid ordering the switch without confirming transceivers, because fibre type, wavelength and distance determine the correct module selection.
FourTeck can coordinate requirements for organisations in Dubai, Abu Dhabi, Sharjah and Ajman through one combined project discussion. The scope may include product quotation, optic selection guidance, rack planning, configuration, migration assistance and testing. Service scope and scheduling remain dependent on the confirmed site conditions and quotation.
GCC Availability
Businesses planning fibre aggregation projects across the GCC can contact FourTeck for requirement review, model confirmation, quotation coordination and deployment planning. The CRS328-4C-20S-4S+RM may be considered for projects in the United Arab Emirates, Saudi Arabia, Kuwait, Qatar, Bahrain and Oman when its SFP-heavy port layout matches the topology. Product availability, compatible optical modules, delivery schedules, service visits and vendor lead times can vary by destination, quantity and project scope. Share the destination country, required switch quantity, fibre standards, optic distances, preferred software environment and expected installation period so the team can prepare appropriate guidance. For Kuwait-related coordination, buyers may also review FourTeck Kuwait technology assistance. No local-stock or fixed-delivery assumption should be made until the exact requirement is reviewed.
Africa Availability
FourTeck can assist organisations evaluating the CRS328-4C-20S-4S+RM for fibre infrastructure projects in Africa, including selected requirements in East Africa and other regional markets. The review can cover switch quantity, optic compatibility, fibre distances, power arrangements, configuration scope, documentation, remote support and renewal or lifecycle planning where relevant. Fulfilment depends on the destination, vendor lead time, shipping arrangements, local power and regulatory requirements, and the complexity of installation. Buyers should provide the destination country, network diagram, required quantities, preferred schedule and any onsite or remote support expectations. Regional resources include technology support information for Kenya, FourTeck Uganda and the wider FourTeck Africa network. Availability and service coverage must be confirmed for each project rather than assumed.
Related products and services to consider
MikroTik SFP modules
Select 1G optics by fibre type, wavelength, distance and connector. Compatibility should be confirmed for the complete link.
MikroTik SFP+ modules and DAC cables
Use suitable 10G modules or direct-attach cables for uplinks, servers or nearby switches after checking both endpoints.
CRS326-24G-2S+RM
A copper-focused alternative for environments that need many Gigabit RJ45 access ports and fewer 10G uplinks.
CRS317-1G-16S+RM
A model to evaluate when the design calls for a larger concentration of 10G SFP+ interfaces rather than primarily 1G SFP access.
Network configuration services
Discuss VLANs, trunks, aggregation, management access, software selection, testing and documentation.
Rack and fibre deployment support
Plan patching, labelling, power feeds, optical testing and migration sequencing as a defined service scope.
Why businesses contact FourTeck
Business buyers often need more than a switch model number. They need confidence that the port mix matches the topology, the selected optics match the fibre plant, the uplinks match the traffic profile and the service scope reflects the actual site. FourTeck supports this process through requirement clarification, bill-of-material guidance, compatibility review, quotation coordination, configuration planning and regional delivery discussions.
This approach is particularly useful for the CRS328-4C-20S-4S+RM because much of the project value depends on correctly selecting accessories and assigning the combo ports. Buyers can share an existing diagram or request help structuring the requirement. For company information, visit about FourTeck, or use the contact page to begin a product-sizing discussion.
Frequently asked questions
Is the CRS328-4C-20S-4S+RM mainly a fibre switch?
Yes. Its main port density is provided by twenty SFP cages, with four SFP+ cages for 10G and four combo groups offering a choice between copper Gigabit Ethernet and SFP.
Are optical transceivers included?
The required optics should be treated as separate bill-of-material items unless a quotation specifically confirms otherwise. Select them by speed, fibre type, wavelength, connector and distance.
Can all eight combo connectors be active together?
No. The four RJ45 connectors and four SFP cages form four combo groups. One side of each group is selected for active operation, giving four active combo interfaces.
Does this model provide PoE output?
No PoE output is listed for this model. Networks that must power cameras, access points or phones should use suitable PoE access switches or separately designed power solutions.
Should we use RouterOS or SwitchOS?
The choice depends on required features and administrator preference. SwitchOS is switch-focused, while RouterOS provides a broader configuration environment. Confirm feature support for the intended design.
Can it replace a dedicated router or firewall?
It is primarily a switching platform. Although RouterOS offers routing features, CPU-processed performance and security requirements should be assessed separately. A dedicated router or firewall may be more suitable.
What information is needed for a Dubai quotation?
Provide quantity, fibre types, distances, connector standards, required SFP and SFP+ modules, preferred operating system, installation location and configuration or support scope.
Can FourTeck help with configuration?
Configuration assistance can be discussed for VLANs, trunks, link aggregation, management access, software selection, migration and testing. The exact scope should be included in the quotation.
Is the product currently available in the UAE?
Contact FourTeck to confirm current availability. Lead time can depend on quantity, vendor supply and whether specific optical modules or project services are included.
What warranty applies?
Warranty terms should be confirmed in the final quotation because coverage and handling can depend on the supply channel, region and current vendor policy.
Build the right fibre-switching package
Send FourTeck your topology, port count, fibre distances and service requirements for a CRS328-4C-20S-4S+RM quotation with suitable options.
