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Brand: MikroTik
MikroTik CRS328-24P-4S+RM 24-Port PoE Switch
Description
A 28-port PoE switch with a built-in 500 W supply
The CRS328-24P-4S+RM is a 28-port independent switch in a 1U rack-mount case: 24 gigabit Ethernet ports with PoE-out and four SFP+ ports for 10 Gbps optical or Ethernet modules (not included). MikroTik states that each copper port offers passive PoE, low-voltage PoE and auto-sensing IEEE 802.3af/at Type 1 and Type 2.
A built-in 100-240 V AC, 500 W power supply feeds the unit. The switch itself uses up to 44 W, leaving a guaranteed 450 W, split as 3 x 150 W for every eight Ethernet ports. A single port can output up to 30 W at high voltage and 26 W at low voltage.
Technical specifications
This is the CRS328-24P-4S+RM parameter list from MikroTik, reduced to entries that agree with the datasheet.
| Parameter | Specification |
|---|---|
| Product code | CRS328-24P-4S+RM |
| Architecture | ARM 32bit |
| CPU | 98DX3236 |
| CPU core count | 1 |
| CPU nominal frequency | 800 MHz |
| Switch chip model | 98DX3236 |
| Dimensions | 443 x 300 x 44 mm |
| Operating System | RouterOS / SwitchOS |
| Size of RAM | 512 MB |
| Storage size | 16 MB |
| Storage type | FLASH |
| Tested ambient temperature | -20°C to 60°C |
| Powering | |
| Number of AC inputs | 1 |
| AC input range | 100-240 |
| Number of PSU slots | 1 |
| Max power consumption without attachments | 44 W |
| Cooling type | 2 fans |
| PoE-out | |
| PoE-out ports | Ether1-Ether24 |
| PoE out | 802.3af/at |
| Low voltage PoE-Out current limit | 1000 mA |
| High voltage PoE-Out current limit | 450 mA |
| Ethernet | |
| 10/100/1000 Ethernet ports | 24 |
| Fiber | |
| SFP+ ports | 4 |
| Peripherals | |
| Serial console port | RJ45 |
| Other | |
| CPU temperature monitor | Yes |
| Current Monitor | Yes |
| PCB temperature monitor | Yes |
| Voltage Monitor | Yes |
| Mode button | Yes |
| Certification & Approvals | |
| Certification | CE, EAC, ROHS |
| IP | IP00 |
Results published on the product page (98DX3236 all port test); RFC2544, Xena equipment, 0.1% packet loss tolerance:
| Test | Rules | Mbps at 1518 B | Mbps at 512 B | Mbps at 64 B |
|---|---|---|---|---|
| Bridging | none (fast path) | 1266.6 | 1120.3 | 229.9 |
| Routing | none (fast path) | 1266.6 | 1121.9 | 175.9 |
| Routing | 25 ip filter rules | 786.9 | 269.9 | 33.7 |
Reading the numbers: the 64 Gbps non-blocking throughput equals 24 gigabit ports plus 4 SFP+ ports at 10G (derived: 24 + 40 = 64 Gbps), so every port can run at line rate in hardware. The CPU table is a separate measurement: 1266.6 Mbps in the fast path at 1518 bytes, 786.9 Mbps with 25 IP filter rules, and 33.7 Mbps for 64-byte packets with the same rules. Use hardware VLAN switching for bulk traffic. For PoE, 450 W is guaranteed in three blocks of 150 W per eight ports, so one block can supply, for example, eight 15 W devices with room to spare.
Switching features and PoE budget
- Non-blocking throughput 64 Gbps, switching capacity 128 Gbps, forwarding rate 95.2 Mpps (datasheet).
- Dual boot: choose RouterOS for routing and Layer 3 features or SwOS for a simplified switch-only system.
- Layer 2 features listed: 802.1Q VLAN with up to 4K VLANs, port isolation, port security, storm control, mirroring, STP/RSTP/MSTP, ACL, SNMP, IGMP snooping, 802.3ad and static link aggregation.
- 16K host table and 10218-byte jumbo frames.
- Temperature-based fan control with current, voltage, CPU and PCB temperature monitors; RJ45 serial console.
Order code and package notes
Order code CRS328-24P-4S+RM: 24P = 24 PoE ports, 4S+ = four SFP+, RM = rack mount. Budget the PoE load per group of eight ports rather than for the whole unit, because the 450 W guaranteed output is divided into three 150 W blocks. SFP+ modules and any Ethernet SFP+ adapters are not included.
Rack installation and operating system choice
Install in a 1U rack with front and rear ventilation; the datasheet lists 443 x 300 x 44 mm, a -20 to 60 degrees C tested range and IP00 on the product page, so the housing is not sealed and belongs in a protected room. Pick RouterOS or SwOS from RouterOS, SwOS or the RouterBOOT loader settings. Default access is 192.168.88.1 with the admin user.
Typical PoE deployments
The unit fits CCTV floors, Wi-Fi access point blocks, VoIP phones and IP intercom systems in offices, hotels and labour camps, with SFP+ uplinks to the building core. Setting PoE to 26 V low voltage matters for MikroTik and other passive-PoE devices; confirm each device input range before enabling 53 V output.
Information to send with an RFQ for the MikroTik CRS328-24P-4S+RM 24-Port PoE Switch
Switch selection depends on how many devices connect, how they are powered and how the switch links back to the core. For the MikroTik CRS328-24P-4S+RM 24-Port PoE Switch, list the number of copper and fibre ports you need, the PoE devices it will feed (cameras, access points, phones) and their individual power class, so the total PoE budget can be checked against the switch’s limit.
- Uplink speed and media: 1G, 2.5G or 10G, copper or SFP/SFP+, and the optic modules required.
- Management needs: VLANs, link aggregation, IGMP snooping, or central management from a controller.
- Rack space, airflow direction and power redundancy in the cabinet.
- Ambient temperature in the room or field cabinet, which matters in GCC summers.
A simple port map of the site is enough for the configuration to be checked before the order is confirmed.
Related items and documents
For a larger PoE count see the CRS354-48P-4S+2Q+RM; see the industrial communications category for fibre switches.
The manufacturer datasheet is linked here. Request availability and a quotation for CRS328-24P-4S+RM from Seven Star LLC.
Frequently asked questions
How many PoE ports does the CRS328-24P-4S+RM have?
24 gigabit ports with PoE-out, at 802.3af/at or passive PoE, plus four SFP+ ports.
What PoE budget is available?
A 500 W supply with 450 W guaranteed for PoE, divided as 3 x 150 W per group of eight ports.
Which operating systems does it support?
RouterOS or SwOS in a dual-boot arrangement.
What is its switching capacity?
64 Gbps non-blocking throughput and 128 Gbps switching capacity, 95.2 Mpps forwarding.
Are SFP+ modules included?
No, the SFP+ modules are not included.
Datasheets & Documents
- Datasheet MikroTik CRS328-24P-4S+RM datasheet (PDF) Download
Reviews (0)
About brand
MikroTik is a Latvian maker of networking hardware and software, founded on 14 March 1996 in Riga by John Tully and Arnis Riekstiņš to develop routers and wireless ISP systems. In 1997 it created the RouterOS operating system for standard PC hardware, and in 2002 it began making its own hardware under the RouterBOARD brand. MikroTik is still privately owned by its two founders.
Seven Star LLC is an independent supplier in Muscat. We list MikroTik devices, each with the manufacturer datasheet, for ISPs, IT contractors and site networks in Oman and the GCC.
MikroTik company profile
| Founded | 14 March 1996, Riga, Latvia |
|---|---|
| Founders | John Tully (CEO) and Arnis Riekstiņš (CTO) |
| Headquarters | Riga, Latvia |
| Software | RouterOS, since 1997 |
| Product families | hEX and RB5009 routers, RB4011 rack-mount routers, CCR cloud core routers, CRS cloud router switches with PoE, wireless access points and outdoor links, RouterOS licences |
Milestones
- 1996: MikroTik is founded in Riga.
- 1997: RouterOS is created.
- 2002: The RouterBOARD hardware brand is born.
MikroTik product series
Routers include the CCR2004-1G-12S+2XS with 25G SFP28 ports, the RB5009UG+S+IN quad-core router with 10G, the rack-mount RB4011iGS+RM and the compact hEX RB750Gr3. Switches include the CRS354-48P-4S+2Q+RM 48-port and CRS328-24P-4S+RM 24-port PoE switches and the CRS310-1G-5S-4S+IN fibre switch.
Wireless products include the SXTsq 5 ac outdoor 5 GHz client and link device, the LtAP LTE6 kit weatherproof 4G router and the cAP ax dual-band Wi-Fi 6 ceiling access point.
Where MikroTik equipment is used
Branch and site-office routing, ISP and campus fibre aggregation, PoE switching for cameras and access points, point-to-point wireless links between buildings, and cellular backup at remote sites.
MikroTik products we list
Ordering MikroTik devices: what we need
Send the exact order code, the quantity, the power source (AC, DC or PoE) and, for wireless and LTE models, the country of use so the regional variant and bands can be confirmed.
Facts checked against MikroTik's own about page (mikrotik.com), October 2026.
Browse MikroTik products by category: Industrial Communications.
Related products
Frequently Asked Questions
How many PoE ports does the CRS328-24P-4S+RM have?
24 gigabit ports with PoE-out, at 802.3af/at or passive PoE, plus four SFP+ ports.
What PoE budget is available?
A 500 W supply with 450 W guaranteed for PoE, divided as 3 x 150 W per group of eight ports.
Which operating systems does it support?
RouterOS or SwOS in a dual-boot arrangement.
What is its switching capacity?
64 Gbps non-blocking throughput and 128 Gbps switching capacity, 95.2 Mpps forwarding.
Are SFP+ modules included?
No, the SFP+ modules are not included.
Reviews
There are no reviews yet.