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CBS350-24S-4G
Cisco CBS350-24S-4G Business 350 24-Port Gigabit SFP Switch,...
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CBS350-24S-4G is a fanless, managed Layer 2+ Gigabit fiber switch with 24 SFP access ports and four fixed 1G uplink interfaces. Two uplinks are dedicated SFP cages; two provide copper/SFP combo connections, with one medium active on each combo interface. The non-PoE design connects independently powered network equipment rather than supplying power to endpoints. The Cisco Business 350 configuration serves small-business networks without a removable uplink bay. Within the Cisco Business portfolio, its rack-mount 1U chassis places optical connections in a standard equipment rack rather than a compact desktop enclosure. The discontinued CBS350-8S-E-2G uses an external AC adapter, whereas this model connects to mains power through an internal supply.
CBS350-24S-4G price for new stock is $1,151.85, a 50% saving from the Cisco list price of $2,303.70. CBS350-24S-4G refurb price is $668.85. CBS350-24S-4G is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for CBS350-24S-4G for additional pricing. Browse the full Cisco CBS350 Business Switches series or explore all Cisco products.
56 Gbps switching capacity enables nonblocking operation across the physical interfaces. 41.66 Mpps forwarding handles 64-byte packets at wire speed. Static routing, RIP v2, and PBR provide local IP forwarding and policy-selected next hops between connected networks. CBS350-24S-4G uses 512 MB of DRAM and 256 MB of flash for running software and storing images; a shared 1.5 MB packet buffer serves traffic queues across all ports. STP/RSTP/MSTP controls bridging loops, while LACP combines compatible links into aggregation groups. Browser configuration uses HTTP/HTTPS, and CLI access is available over SSH, Telnet, or the RJ-45 console connection. SNMP versions 1, 2c, and 3 provide management-station access. 34.3W maximum draw at 220V is the chassis load to allow for when sizing the rack's AC feed. Hardware stacking is unavailable, so multiple units retain separate forwarding and control planes.
Specify CBS350-24S-4G in new sealed or certified refurbished condition, and put the required regional ordering PID, condition, and quantity on the purchase order. Certified refurbished units are inspected and bench-tested for power-on and POST, rated-speed links on every port, a clean boot, optics bay recognition, and PSU status; firmware is verified and configurations are wiped to factory default. New orders carry up to a 3-year extended warranty, refurbished orders carry up to 1 year, and every condition includes 30-day returns with terms applying; Cisco's Limited Lifetime platform warranty is bounded by May 31, 2029. For enterprise and volume purchasing, POs are accepted with Net-30 for government; RMA with advance replacement and regional stock/RMA cover UK, EU, US, and MEA.
| Key Specs | Key Spec Values |
|---|---|
Port Configuration | 24x1G SFP access / 4x1G uplinks. |
Max Power Draw | 34.3W at 220V. |
Cooling | Fanless. |
Replaces | SG350-28SFP-K9-AU, SG350-28SFP-K9-EU, SG350-28SFP-K9-IN, SG350-28SFP-K9-JP, SG350-28SFP-K9-NA, SG350-28SFP-K9-UK; end-of-sale July 30, 2022. |
Lifecycle Status | End of sale May 30, 2024. |
When several fiber-connected workgroups need consolidation into one small-business switch, VLAN separation becomes part of the port plan rather than a separate chassis purchase. Support for 4094 simultaneous VLANs allows multiple traffic domains to be configured. Specify the VLAN memberships, tagging requirements, and fiber circuit allocation before the purchase order.
When an existing router retains external connectivity but local subnets need switching-side interfaces, interface scale becomes a purchase constraint. The switch supports 128 IP interfaces on physical ports, link aggregations, VLAN interfaces, or loopbacks. Count the required interfaces and specify the addressing plan before committing the purchase order.
When several small-business locations need the same management workflow, an embedded Cisco Business Dashboard probe changes the supporting equipment list. A separate on-site hardware or virtual-machine probe is unnecessary for this model. Specify the Dashboard deployment, administrator access, and configuration baseline for each location before placing a standardized hardware order.
10G uplinks to distribution
CBS350-24S-4G has fixed 1G SFP interfaces without SFP+ uplinks or a removable uplink bay. A distribution connection requiring a native 10G interface exceeds this configuration's interface speed.
Hardware stacking across multiple switches
Hardware stacking is unavailable on CBS350-24S-4G. Stacking within the Cisco Business 350 family is restricted to specific models with 10G interfaces, not this Gigabit fiber configuration.
PoE power for connected endpoints
CBS350-24S-4G is non-PoE, and its copper combo ports do not supply endpoint power. Phones, access points, or cameras requiring switch-delivered power cannot be powered directly.
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| CBS350-24S-4G |  CBS350-48T-4X |  CBS350-16P-2G |  CBS350-8P-2G |  CBS350-8FP-2G | |
|---|---|---|---|---|---|
| Depth | 203 mm | 288 mm | 297 mm | 272 mm | 272 mm |
| Ethernet Technology | Gigabit Ethernet | Gigabit Ethernet | Gigabit Ethernet | Gigabit Ethernet | Gigabit Ethernet |
| Flash Memory | 256 MB | 256 MB | 256 MB | 256 MB | 256 MB |
| Form Factor | Rack-Mount 1U | Rack-Mount 1U | Desktop | Desktop | Desktop |
| Height | 44 mm | 44 mm | 44 mm | 44 mm | 44 mm |
| Manufacturer Part Number | CBS350-24S-4G | CBS350-48T-4X | CBS350-16P-2G | CBS350-8P-2G | CBS350-8FP-2G |
| Memory | 512 MB | 512 MB | 512 MB | 512 MB | 512 MB |
| Power Consumption | 34.3W | 51.01W | 156.4W | 83.17W | 148.12W |
| Switching Capacity | 56 Gbps | 176 Gbps | 36 Gbps | 20 Gbps | 20 Gbps |
| Weight | 2.7 kg. | 3.95 kg | 2.38 kg | 2.59 kg | 2.59 kg |
| Width | 440 mm | 445 mm | 268 mm | 268 mm | 268 mm |
Every unit is authentic, sourced through trusted and authorised channels, and serial-verified on request. Genuine networking and IT hardware, guaranteed, or your money back.
New products are backed by up to 3 years of extended warranty, and certified refurbished units by up to 3 months, for dependable protection on every order. Coverage is clear, honoured in full, and confirmed on each product page.
If a unit ever falls short, our streamlined RMA process gets a replacement to you fast, with advance replacement available to keep your network running. No jargon, no runaround.
Every device is inspected, bench-tested, and firmware-verified, with configurations wiped before dispatch. Additional testing can be arranged to confirm full working condition on request.
Our specialists assist with compatibility, configuration, licensing, and installation, before and after you buy. Real hardware expertise, whenever you need it.
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Reviewed on the 24 December 2018
High SFP density. Perfect for fiber aggregation and reliable L3 management.
Reviewed on the 26 August 2025
Excellent fiber switch. 24 SFP ports provide amazing flexibility for our backbone.
Reviewed on the 12 December 2024
Top-tier SFP performance. Professional Layer 3 features and very stable connections.
Reviewed on the 23 May 2021
Reliable and fast. Ideal for sites requiring high-density fiber connectivity daily.
Reviewed on the 18 May 2023
Professional fiber switching. Rock-solid uptime and very comprehensive management options.
Reviewed on the 19 November 2025
Consistent throughput. The SFP ports are stable and easy to manage.
Reviewed on the 27 April 2018
Dependable and robust. High-quality build for critical fiber infrastructure roles.
Reviewed on the 6 April 2022
Excellent fiber density. L3 routing is fast and the switch is stable.
CBS350-24S-4G identifies a Cisco Business 350 managed switch: CBS350 is the series, 24S denotes 24 Gigabit SFP access ports, and 4G denotes four Gigabit uplink interfaces comprising two copper/SFP combo ports and two dedicated SFP ports. The base model has no license-tier suffix; CBS350-24S-4G-NA is the US ordering variant.
The Cisco Business 350 is managed through an HTTP/HTTPS web interface, CLI over SSH or Telnet, the RJ-45 console, SNMP, Cisco Business Dashboard, and the Cisco Business mobile app. Dashboard uses an embedded probe, while Cisco Network Plug and Play provides provisioning. SNMP versions 1, 2c, and 3 are supported.
Yes, CBS350-24S-4G reached end of sale on May 30, 2024. Software maintenance and vulnerability/security support ended May 30, 2025, while the last date of hardware support is May 31, 2029. No migration product is designated for this configuration, so an order should be assessed as discontinued hardware rather than a current-generation rollout.
ORM Systems offers new sealed CBS350-24S-4G with up to a 3-year extended warranty and certified refurbished units with up to 1 year. Returns are 30 days for either condition; terms apply. Cisco's Limited Lifetime platform warranty includes next-business-day replacement where available and is bounded by the May 31, 2029 support cutoff.
No, Cisco Business 350 requires no separately purchased feature license or operating subscription. Switching and routing functions accompany the hardware purchase, without a minimum subscription term or tier-upgrade order. For CBS350-24S-4G, the operating-feature requirement is unchanged between new sealed and certified refurbished hardware; a subscription is not needed to enable those functions.
CBS350-24S-4G replaces the discontinued SG350-28SFP-K9-AU, SG350-28SFP-K9-EU, SG350-28SFP-K9-IN, SG350-28SFP-K9-JP, SG350-28SFP-K9-NA, and SG350-28SFP-K9-UK regional models. Those predecessor switches reached end of sale on July 30, 2022. Match the regional ordering suffix before specifying replacement hardware, and account for the replacement's own discontinued status when planning the remaining installation life.
CBS350-24S-4G provides 24 dedicated Gigabit SFP access ports plus two dedicated Gigabit SFP uplinks and two Gigabit copper/SFP combo uplinks. The chassis supports 28 active Ethernet connections, with one medium active on each combo interface. The copper connectors are combo uplinks, not an additional bank of copper access ports.
The 24-port Gigabit SFP switch accepts MGBSX1 for multimode fiber to 500 m and MGBLX1 for single-mode fiber to 10 km. These are 1G transceivers, not removable uplink cards. The required optic PID is ordered separately and must match the fiber type and remote-end requirements of each connection.
No, CBS350-24S-4G cannot form a hardware stack. Its fixed Gigabit interfaces are outside the stacking-capable Cisco Business 350 model set, which uses 10G interconnects. Centralized Dashboard management does not turn this configuration into a shared forwarding and control plane. The chassis remains an individually managed switching unit.
The Cisco Business 350 supports static IPv4 routing, RIP v2, and PBR, with limits of 990 static routes and 128 IP interfaces. IPv6 routing is also supported. For CBS350-24S-4G, the as-shipped routing capability does not depend on a separately purchased license tier or operating subscription.
CBS350-24P-4G supplies PoE+ through 24 copper access ports with a shared 195W budget, while CBS350-24S-4G provides non-PoE fiber access. Both are discontinued models. The PoE model corresponds to powered copper endpoints; the fiber model corresponds to independently powered equipment reached over Gigabit SFP links.
CBS350-24S-4G connects directly to mains power through an internal AC supply, while the discontinued CBS350-8S-E-2G uses an external AC adapter. The smaller model also has eight SFP access ports rather than 24. The internal-supply model fits rack-based fiber installations; the adapter-powered model fits smaller existing fiber installations.
CBS350-24S-4G provides Gigabit SFP interfaces, while the discontinued CBS350-24XS provides 24 10G SFP+ interfaces with four shared copper connections. The Gigabit model matches existing 1G fiber links; the discontinued 10G model corresponds to installations requiring 10G optical interfaces rather than Gigabit-only connections.
CBS350-24S-4G uses an included internal AC supply accepting 100-240V at 50-60 Hz; an external adapter is unnecessary. Maximum chassis consumption is 32W at 110V and 34.3W at 220V. The mains connection powers the switch itself, while connected endpoints require their own power arrangements because this configuration is non-PoE.
Yes, CBS350-24S-4G supports STP/RSTP/MSTP and LACP for redundant bridged links and link aggregation. LACP supports eight aggregation groups and eight active ports per group, subject to available physical ports. These functions do not add hardware stacking or change the negotiated Ethernet speed of an individual interface.
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