Cisco CBS350X-48NGU-4X Full English Product Description

1. Short Sales Title (For Quotation & E-commerce Listing)

Cisco CBS350X-48NGU-4X Business 350X Series 48-Port Mixed Multi-Gigabit Non-PoE Fully Managed Layer 3 Switch, Global Standard Version, 4 Dedicated 10G SFP+ High-Speed Uplink Slots (4X = four 10G fiber uplinks, distinct from 4G 1G SFP uplink models), Dual-Stack IPv4/IPv6 Dynamic Routing, Enhanced True Stackable, 1RU Rackmount High-Density Multi-Speed Copper 10G Backbone Aggregation Switch

2. Official Product Overview

The Cisco CBS350X-48NGU-4X is a high-density next-gen multi-gigabit non-PoE enterprise Layer 3 managed switch within the upgraded Cisco Business 350X high-performance switch lineup, featuring upgraded ARM processing chipset, faster stacking interconnection bandwidth and optimized variable-speed multi-fan thermal architecture compared to the base CBS350 generationCisco.

Model Suffix Breakdown

NGU: Next-Gen Multi-Gigabit Unpowered (Non-PoE) — 40×10/100/1000BASE-T standard Gigabit RJ45 + 8×5GBase-T high-speed multi-gigabit RJ45 copper ports, zero integrated PoE power delivery
4X: Four independent dedicated 10G SFP+ fiber uplink ports for 10-Gigabit high-bandwidth cross-building backbone backhaul, clearly differentiated from 4G variants only supporting 1G Gigabit SFP uplink interfaces.

Designed for large enterprise mixed-speed office access layers, multi-floor media production workstation aggregation, large retail multi-speed terminal networks, centralized optical NAS storage backhaul and large-scale fiber IP surveillance edge environments without PoE-powered endpoints. Surpassing entry-level CBS250 smart switches and standard CBS350 models, CBS350X delivers a complete enterprise-grade feature suite: dynamic RIPv2 IPv4 routing, enhanced single-IP true stacking (supports up to 4 CBS350X units), comprehensive anti-spoofing security toolkit, sFlow traffic analytics and full-featured multicast traffic controlCisco.

This high-density mixed multi-gigabit copper-only switch provides flexible hybrid speed connectivity for mass standard Gigabit office desktops, 5G high-performance 4K/8K video editing workstations, retail POS terminals and standalone high-power Wi-Fi 6/6E wireless access points. Four standalone dedicated 10G SFP+ fiber uplink slots deliver redundant high-speed long-distance backbone interconnection to core layer switches via single/multi-mode fiber, eliminating bandwidth bottlenecks for large-volume mixed-speed business workloads. No PoE power module is integrated, intended for deployments where all endpoints use separate local power adapters.

It features 40×Gigabit + 8×5GBase-T multi-gigabit RJ45 copper access ports plus 4 dedicated 10G SFP+ fiber uplink slots, offering 48 mixed-speed copper access interfaces + 4×10G high-speed uplink ports for scalable large-scale fiber backbone deployment. Powered by an upgraded high-performance 800MHz ARM processor with 512MB DRAM and 256MB flash memory, it delivers 240 Gbps non-blocking switching capacity and 178.56 Mpps wire-speed forwarding rate for 64-byte frames, paired with an enhanced large 3MB shared dynamic packet buffer to eliminate congestion under massive mixed-speed office traffic, bulk multi-TB NAS storage batch transfers and mass multi-stream 4K surveillance backhaul over 10G fiber links. Intelligent variable-speed multi-fan cooling ensures stable 24/7 continuous heavy-load rack operation in large office central equipment rooms, media production core server racks and campus main wiring closets.

3. Port & Hardware Specifications

40 × 10/100/1000BASE-T RJ45 copper ports, auto-negotiate 1G/100M, No PoE power support
8 × 5GBase-T multi-gigabit RJ45 copper ports, auto-negotiate 5G/2.5G/1G/100M, No PoE support
All 48 access ports are unpowered, no built-in PoE power supply module
4 × dedicated 10G SFP+ uplink slots (fiber-only non-combo design, 4X = four 10G high-speed uplink ports, completely separated from 4G 1G-only SFP uplink models)
Supported Cisco transceivers: Gigabit SFP (MGBSX1/MGBLX1/MGBLH1/MGBT1), 10G SFP+ (SFP-10G-SR, SFP-10G-LR, SFP-10G-LX, copper twinax SFP+)
Internal universal AC power supply: 100–240V 50/60Hz global standard power cord
Upgraded intelligent variable-speed multi-fan thermal cooling system for long-term heavy mixed-speed traffic loads
Switching Capacity: 240 Gbps Non-Blocking
Forwarding Rate (64-byte packets): 178.56 Mpps
Shared Packet Buffer: 3 MB
MAC Address Table: 16K entries; Jumbo Frame support up to 9000-byte MTU
Dual console ports: RJ45 serial console + mini USB port for offline local CLI configuration
Front-panel USB Type-A port for offline configuration backup & firmware upgrade
Enhanced true stacking capability: stack up to 4 CBS350X series switches under single IP unified management with improved stack throughput; cross-stack LAG, VLAN, QoS and remote port mirroring fully supported
Form Factor: 1RU standard rackmount chassis, support rack mount, wall mount and desktop placement
Dimensions: 445 × 350 × 44 mm (17.5 × 13.78 × 1.73 inches)
Weight: 2.98 kg (6.57 lbs)

4. Comprehensive Layer 2 Switching Functions

Up to 4096 IEEE 802.1Q tagged VLANs, port-based VLAN, voice VLAN, guest VLAN, private VLAN, dedicated management VLAN
8 priority egress queues with Strict Priority / WRR / SPQ QoS scheduling to prioritize multi-gigabit low-latency VoIP, mass 4K surveillance video and enterprise high-volume business data traffic
IEEE 802.3ad LACP link aggregation, multiple LAG groups for bandwidth expansion & link redundancy, cross-stack LAG fully supported
IGMP Snooping v1/v2/v3 with built-in IGMP Querier, supporting up to 1024 multicast groups for IPTV and mass multi-gigabit IP surveillance
LLDP & LLDP-MED automatic endpoint discovery for multi-speed workstations, fiber-connected cameras and high-speed wireless gateways
Port mirroring, VLAN mirroring, RSPAN remote mirroring, RSTP/MSTP/PVST+ spanning tree, BPDU Guard, Root Guard, Loop Guard
Broadcast/multicast/unicast storm control to prevent multi-gigabit and 10G uplink flooding failures
Enterprise anti-spoofing toolkit: DHCP Snooping, Dynamic ARP Inspection (DAI), IP Source Guard, static IP/MAC/Port Binding
sFlow traffic monitoring for real-time multi-gigabit and 10G uplink flow-level bandwidth analysis and network fault troubleshooting

5. Advanced Dual-Stack Dynamic Layer 3 Routing

Far exceeding static-only routing on CBS250 smart switches, CBS350X provides full wire-speed Layer 3 forwarding:

Dynamic routing protocol: RIPv2 for IPv4
Up to 990 IPv4 static routes, 990 IPv6 static routes, 128 Layer 3 VLAN interfaces
Native dual-stack IPv4/IPv6 wire-speed forwarding, CIDR aggregation, full IPv6 first-hop security (ND Inspection, RA Guard)
Built-in IPv4 DHCP Server & DHCP Relay with Option 82, UDP relay functionality
Policy-Based Routing (PBR) for flexible traffic steering across fiber-separated multi-floor network segments
Direct inter-VLAN routing without external routers to reduce core gateway latency and bandwidth load for cross-building 10G backbone traffic

6. Enterprise-Grade Multi-Layer Security Suite

IEEE 802.1X port-based authentication with RADIUS/TACACS+ centralized access control, web-based captive portal authentication
Port security, static/dynamic MAC address binding, automatic port shutdown for unauthorized multi-gigabit-connected terminals
Comprehensive DoS attack suppression, hardware accelerated L2-L4 ACL traffic filtering for mixed-speed copper and 10G fiber links
Encrypted management channels: HTTPS web GUI, SSH multi-privilege CLI, SCP file transfer, SNMPv3 secure remote monitoring
Persistent syslog event logging, built-in cable diagnostic tools, mandatory password complexity policy
Independent guest network isolation, Private VLAN Edge (PVE) for client separation
Secure boot, encrypted configuration file storage, IPv6 ND Inspection & RA Guard to block IPv6 fiber link spoofing attacks

7. Energy-Saving Green Technologies

IEEE 802.3az Energy Efficient Ethernet (EEE): auto power reduction for idle multi-gigabit copper and SFP+ fiber links
Dynamic power tuning based on link speed and cable length to cut unnecessary power consumption
Port LED dimming or full shutdown mode for unmanned multi-speed wiring closets
Intelligent variable fan speed adjustment to reduce power draw and noise under light network load
Optimized upgraded hardware thermal design with balanced heat dissipation and extended service lifespan

8. Multi-Mode Local & Remote Management

Intuitive graphical web management interface (HTTP/HTTPS) with basic & advanced operation modes
Dual offline local console access: serial RJ45 + mini USB port for offline CLI configuration
SSH secure remote command line management with multi-user privilege levels (1 / 7 / 15)
SNMP v1/v2c/v3 compatible with third-party network monitoring platforms, native sFlow support
TFTP/SCP/offline USB firmware upgrade, dual redundant firmware images for reliable zero-downtime upgrades
SNTP time synchronization, ping & traceroute diagnostic tools, Smartport auto-provisioning templates dedicated for multi-gigabit endpoints
Single IP enhanced stacking management for centralized batch control of up to 4 stacked CBS350X switches
Fully compatible with Cisco Business Dashboard & Cisco Business Mobile App for unified topology visualization and zero-touch large-scale mixed-speed multi-gigabit network deployment

9. Physical & Environmental Parameters

Operating Temperature: -5°C to 50°C; Storage Temperature: -25°C to 70°C
Operating Humidity: 10%–90% non-condensing relative humidity
Global compliance standards: CE, RoHS, UL, FCC Class A
MTBF: 1,720,000+ hours at 25°C ambient temperature
Warranty: Cisco Limited Lifetime Hardware Warranty

10. Typical Deployment Scenarios

Large enterprise high-density mixed-speed workstation aggregation switch for mass 1G office PCs and 5G high-performance video editing equipment & centralized optical NAS storage
Multi-building campus main distribution switch with flexible mixed 1G/5G multi-gigabit copper ports and 10G SFP+ fiber uplinks interconnecting office, classroom and media studio blocks
Large professional media production studio mixed-speed core network for low-latency mass 4K/8K video workflow and optical storage access
National retail chain headquarters core switch mixing thousands of Gigabit POS terminals and 5G high-speed backend servers with 10G fiber backbone
Stackable multi-switch scalable large enterprise network leveraging enhanced true stacking and dynamic Layer 3 routing with high-density mixed multi-gigabit copper and high-bandwidth 10G uplink capacity

11. Standard Package Contents

1 × Cisco CBS350X-48NGU-4X Next-Gen Multi-Gigabit Non-PoE Fully Managed Switch (Global Standard Version)

1 × Global standard AC power cord

Rack mounting brackets and installation screws

Quick Start Guide & global regulatory compliance documents

Short Commercial Version (For Product Ads & Listing Titles)

The Cisco CBS350X-48NGU-4X is an upgraded global high-density next-gen multi-gigabit non-PoE fully managed Layer 3 switch under Cisco Business 350X series, equipped with 40×1G + 8×5GBase-T mixed multi-speed copper access ports and 4 dedicated 10G SFP+ high-speed fiber uplink ports (4X = four 10G uplink slots, separate from 1G SFP 4G models). Featuring dynamic dual-stack IPv4/IPv6 Layer 3 routing, enhanced high-speed true stacking capability, enterprise anti-spoofing security, full QoS and intelligent variable-speed multi-fan thermal design, it delivers non-blocking flexible high-density mixed multi-gigabit data connectivity for mass multi-speed workstations, media editing equipment and centralized optical storage in large enterprise, media studio and campus high-bandwidth core networks, supporting rack/wall/desktop deployment, energy-efficient upgraded hardware and Cisco Limited Lifetime Hardware Warranty.


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