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CBS350-48P-4X-UK
Cisco CBS350-48P-4X-UK Business 350 48-Port Gigabit PoE+ Swi...
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CBS350-48P-4X-UK combines 48 Gigabit PoE+ access ports with four fixed 10G SFP+ uplinks in a managed Layer 2+ switch for small-business office networks. The 1U rack-mount chassis brings copper endpoint connections and fiber uplinks into the same enclosure. The Cisco Business 350 Series Managed Switches serve IP phones, wireless access points and IP surveillance devices alongside ordinary wired clients. The discontinued CBS350-48FP-4X-UK carries a 740W PoE budget at the same port density, distinguishing the higher-power version when comparing installed equipment. Copper downlinks do not offer multigigabit speeds, and uplink expansion uses the fixed cages rather than a removable network card.
CBS350-48P-4X-UK price is is available on request. Get immediate quote.
Request bulk order quote for CBS350-48P-4X-UK for additional pricing. Browse the full Cisco CBS350 Business Switches series or explore all Cisco products.
176 Gbps switching capacity supports nonblocking forwarding across the installed ports. 130.94 Mpps forwarding at a 64-byte packet size establishes the packet-processing limit for traffic sizing. 370W of shared PoE power requires an endpoint allocation plan rather than a full-power assumption for every connection. Static routing, RIP v2 and PBR support local forwarding and next-hop selection. CBS350-48P-4X-UK uses 512 MB DRAM and 256 MB flash for control software and images, while a 3 MB packet buffer is shared across the ports. Business 350 management provides browser configuration and Textview CLI, with SNMP access for network management stations. STP/RSTP/MSTP provide loop-control options, and LACP supports aggregated links. The internal AC supply is not redundant, so power resilience must be addressed outside the chassis. 471.9W worst-case consumption with PoE provides the maximum chassis load for electrical circuit sizing.
Specify quantity and condition on the PO for CBS350-48P-4X-UK, available new sealed or certified refurbished. Refurbished units are inspected and bench-tested for power-on, POST, clean boot and rated-speed port links, with PoE output verified under load on every powered port, firmware verified and configurations wiped to factory default. ORM warranties provide up to 3-year extended coverage for new units and up to 1 year for certified refurbished units, with 30-day returns on every condition, terms apply; Cisco’s separate limited lifetime hardware warranty ends October 31, 2029. POs are accepted, with Net-30 for government and RMA with advance replacement; specify volume requirements and the relevant UK, EU, US or MEA regional stock and RMA arrangements.
| Key Specs | Key Spec Values |
|---|---|
Port Configuration | 48 x 1G PoE+ / 4 x 10G SFP+ |
PoE Budget | 370W shared |
Stacking | Hardware stacking / 4 members |
Replaces | SG350X-48P-K9-UK: October 30, 2021 / SG550X-48P-K9-UK: July 30, 2022 |
Lifecycle Status | End of sale October 29, 2024; support ends October 31, 2029 |
Replacement PID | C1300-48P-4X |
When an office adds separate IP networks, the 128-interface ceiling becomes an equipment-selection check rather than just a port-count question. Physical ports, link aggregation, VLAN interfaces and loopbacks can host routed interfaces. Count the required interfaces and specify the intended addressing plan before placing the purchase order.
When several sites need a repeatable configuration, text-editable configuration files and CLI privilege levels 1, 7 and 15 provide concrete staging requirements. Assign technician and administrator roles, separate site-specific settings from the common configuration, and specify the configuration and access-control checks required before placing the PO.
When a staging lab must validate traffic behavior before installation, port mirroring supports eight source ports feeding one destination port. RSPAN extends capture across the Layer 2 domain. Identify the traffic that needs inspection, then specify capture-port assignments and the analyzer connection before placing the PO.
Continued security maintenance for new deployments
Vulnerability and security maintenance ended October 29, 2025, despite later hardware support. C1300-48P-4X is the current migration model for a replacement purchase.
Multigigabit speeds on access ports
The 48 copper access ports stop at 1 Gbps and do not provide multigigabit connections; 10G operation is confined to the fixed SFP+ uplinks.
PoE loads above the shared budget
The 370W shared allocation limits total endpoint power. C1300-48FP-4X is the current full-PoE migration option; confirm its budget against the planned powered-device load.
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| CBS350-48P-4X-UK |  CBS350-24FP-4G-EU |  CBS350-24S-4G-UK |  CBS350-16T-E-2G-UK |  CBS350-24NGP-4X-UK | |
|---|---|---|---|---|---|
| Depth | 350 mm | 345 mm | 203 mm | 210 mm | 350 mm |
| Ethernet Technology | Gigabit Ethernet | Gigabit Ethernet | Gigabit Ethernet | Gigabit Ethernet | Multi-Gigabit (2.5G/5G) |
| Flash Memory | 256 MB | 256 MB | 256 MB | 256 MB | 256 MB |
| Form Factor | Rack-Mount 1U | Rack-Mount 1U | Rack-Mount 1U | Desktop | Rack-Mount 1U |
| Height | 44 mm | 44 mm | 44 mm | 44 mm | 44 mm |
| Manufacturer Part Number | CBS350-48P-4X-UK | CBS350-24FP-4G-EU | CBS350-24S-4G-UK | CBS350-16T-E-2G-UK | CBS350-24NGP-4X-UK |
| Memory | 512 MB | 512 MB | 512 MB | 512 MB | 512 MB |
| Power Consumption | 471.9W | 449.7W | 34.3W | 19.63W | 488.9W |
| Switching Capacity | 176 Gbps | 56 Gbps | 56 Gbps | 36 Gbps | 192 Gbps |
| Weight | 5.43 kg | 4.6 kg | 2.7 kg | 1.42 kg | 5.3 kg |
| Width | 445 mm | 445 mm | 440 mm | 268 mm | 440 mm |
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CBS350-48P-4X-UK identifies a Cisco Business 350 managed switch: CBS350 is the family, 48 means 48 Gigabit access ports, P denotes PoE+, and 4X means four 10G SFP+ uplinks. UK is the regional suffix used for the United Kingdom, Saudi Arabia, Qatar, Kuwait, Singapore, Hong Kong and Malaysia.
370W is the shared PoE budget of CBS350-48P-4X-UK across its 48 PoE+ ports. The switch supports 802.3af and 802.3at devices, with powered connections drawing from the same allocation. Add endpoint requirements together rather than treating the port count as a guarantee that every device can draw maximum power simultaneously.
CBS350-48P-4X-UK has four fixed 10G SFP+ uplinks that also support 1G operation. Supported optical choices include SFP-10G-SR for multimode fiber and SFP-10G-LR for single-mode fiber. These are transceivers for the built-in cages, not removable uplink cards; specify the required optics separately from the chassis.
CBS350-48P-4X-UK supports a web UI over HTTP/HTTPS, CLI through the RJ-45 console or SSH/Telnet, SNMP, Cisco Business Dashboard and the Cisco Business mobile app. The embedded Dashboard probe avoids a separate probe appliance, while Cisco Network Plug and Play supports provisioning. Select management access and authentication settings before staging.
Four supported Cisco Business 350 switches can form a hardware stack, including CBS350-48P-4X-UK, using 10G interfaces in ring or chain layouts. Active/standby control manages the stack. Supported direct-attach options include SFP-H10GB-CU1M, SFP-H10GB-CU3M and SFP-H10GB-CU5M; match cable length and reserve the interfaces needed for ordinary network uplinks.
Static routing, RIP v2 and PBR are available on CBS350-48P-4X-UK, placing this configuration in the Layer 2+ category. The switch supports 990 static routes and 128 IP interfaces, with interfaces configurable on physical ports, link aggregation, VLANs or loopbacks. Match the routing feature set and interface requirements before selecting the platform.
CBS350-48FP-4X-UK provides a 740W PoE budget, compared with 370W on CBS350-48P-4X-UK. Both models are discontinued. The standard-power model addresses an installed estate whose endpoint allocation stays inside the smaller budget; the full-PoE version addresses a larger shared power requirement within the same retired family.
CBS350-48P-4X-UK carries four 10G SFP+ uplinks, while CBS350-48P-4G-UK carries four 1G SFP uplinks. Both models are discontinued. The 4X version addresses an existing installation requiring faster uplinks; the 4G version addresses like-for-like maintenance where the installed uplink requirement remains Gigabit.
C1300-48P-4X is the current migration model, while CBS350-48P-4X-UK ended sale on October 29, 2024. Both are 48-port Gigabit PoE models with four 10G SFP+ uplinks. The CBS350 model addresses maintenance of an existing installed base; C1300-48P-4X is the successor for replacement purchases.
CBS350-48P-4X-UK is discontinued: end of sale was October 29, 2024, and the last date of support is October 31, 2029. Software maintenance and vulnerability/security support ended October 29, 2025. The later hardware support deadline does not extend the period for software fixes or security maintenance.
CBS350-48P-4X-UK replaces discontinued SG350X-48P-K9-UK and SG550X-48P-K9-UK. Their end-of-sale dates were October 30, 2021 and July 30, 2022, respectively. The CBS350 model is also discontinued, so a maintenance purchase should distinguish like-for-like sparing from migration to the current C1300-48P-4X.
ORM offers CBS350-48P-4X-UK new sealed or certified refurbished, with up to 3-year extended coverage for new units and up to 1 year for refurbished units. Both conditions have 30-day returns; terms apply. Cisco’s separate limited lifetime hardware warranty includes next-business-day replacement where available, subject to eligibility, and ends October 31, 2029.
Yes, CBS350-48P-4X-UK is a 1U rack-mount switch measuring 445 mm wide, 350 mm deep and 44 mm high, with a 5.43 kg weight. A mounting kit is included in the original package. Check rack depth and support arrangements before ordering replacement hardware for an existing enclosure.
No, CBS350-48P-4X-UK uses a single internal AC supply and has no redundant PSU option. The input range is 100-240V AC. Worst-case consumption reaches 471.9W with PoE; allow for the whole chassis load rather than budgeting only for the power delivered to connected endpoints.
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