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ESW-520-48P-K9
Cisco ESW-520-48P-K9 ESW 500 48-Port Fast Ethernet PoE Switc...
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ESW-520-48P-K9 provides managed Layer 2 access through 48 Fast Ethernet PoE ports for small-business voice, video, data, and wireless connections. Two copper Gigabit uplinks and two dedicated Gigabit SFP slots provide fixed upstream connectivity, while the 1U rack chassis accommodates centralized installation. The Cisco ESW 500 Series belongs to the Cisco Small Business Pro family and integrates with the Cisco Smart Business Communications System. The discontinued ESW-520-48-K9 offers the same access-port density without inline power. This configuration combines a powered endpoint edge with separate copper and fiber connections upstream, without requiring an uplink-card selection on the purchase order. Its endpoint interfaces remain Fast Ethernet rather than Gigabit.
ESW-520-48P-K9 price for new stock is is available on request. Get immediate quote. ESW-520-48P-K9 refurb price is $233.73.
Request bulk order quote for ESW-520-48P-K9 for additional pricing. Browse the full Cisco ESW 500 Switches series or explore all Cisco products.
17.6 Gbps switching capacity defines the switching fabric's traffic-handling envelope. 13 Mpps forwarding at 64-byte packets provides the packet-processing figure for this configuration. 370W of shared PoE power supports endpoint allocation, with 15.4W available to an individual powered port rather than maximum power across every connection simultaneously. STP/RSTP/MSTP and LACP provide loop control and link aggregation, while four hardware queues support traffic prioritization. ESW-520-48P-K9 supports SNMP versions 1, 2, and 3 for monitoring, with port mirroring available for traffic analysis. VLAN segmentation, RADIUS-based port authentication, and access control lists provide controls for traffic membership and admission. The integrated power input accepts 100–240V AC; an external RPS1000 provides a redundancy path rather than a second internal supply. Operation is specified from 0°C to 40°C, making enclosure temperature and ventilation part of the installation checks.
ORM Systems offers ESW-520-48P-K9 new sealed and certified refurbished; new units carry up to a 3-year extended warranty, certified refurbished units carry up to 1 year, and every condition includes 30-day returns, terms apply. Certified refurbished units are inspected and bench-tested, including PoE output under load on every powered port, optics bay recognition, clean boot, firmware verification, and configuration wiping to factory default. Specify the condition, quantity, optics, and required power accessories on the purchase order. PO accepted, Net-30 for government, and RMA with advance replacement support enterprise and volume purchasing, with regional stock and RMA coverage across the UK, EU, US, and MEA.
| Key Specs | Key Spec Values |
|---|---|
Operating System | ESW 500 Series firmware |
Port Configuration | 48 x 100M PoE / 2 x 1G copper / 2 x 1G SFP |
PoE Budget | 370W shared |
Lifecycle Status | Cisco support ended March 31, 2017 |
When an existing Cisco Smart Business Communications System needs additional endpoint connections, the factory configuration supports a plug-and-play voice deployment. Smartports provides an IP phone plus desktop role with a configurable data VLAN. Confirm the 802.1Q tagging plan and endpoint roles before specifying the installation.
When a spare must be prepared before an installation window, two firmware images support an alternate-image maintenance workflow. Browser-based upgrades and TFTP provide different transfer methods for the ESW 500 Series. Confirm the intended image, management workstation compatibility, and saved configuration before releasing the staging purchase order.
Gigabit speed on all access ports
The access interfaces stop at 100 Mbps; Gigabit connectivity is limited to uplinks. A deployment requiring Gigabit connectivity to every endpoint exceeds this model's access-port capability.
More than 15.4W per endpoint
The powered access interfaces support IEEE 802.3af PoE with a 15.4W maximum per port. An endpoint requiring more cannot receive its full power requirement from one port.
Active Cisco manufacturer support
Cisco support ended March 31, 2017. Deployments requiring active manufacturer service need supported hardware; purchasing unused inventory does not restart this retired model's manufacturer support lifecycle.
Mon–Fri: [09:00-16:00]
Avg. response under 30 mins
| ESW-520-48P-K9 |  ESW-520-48-K9 |  ESW-540-24P-K9 |  ESW-520-8P-K9 |  ESW-540-8P-K9 | |
|---|---|---|---|---|---|
| Depth | 375 mm | 375 mm | 375 mm | 170 mm | 170 mm |
| Ethernet Technology | Fast Ethernet | Fast Ethernet | Gigabit Ethernet | Fast Ethernet | Gigabit Ethernet |
| Form Factor | Rack-Mount 1U | Rack-Mount 1U | Rack-Mount 1U | Desktop | Desktop |
| Height | 44 mm | 44 mm | 44 mm | 44 mm | 44 mm |
| Manufacturer Part Number | ESW-520-48P-K9 | ESW-520-48-K9 | ESW-540-24P-K9 | ESW-520-8P-K9 | ESW-540-8P-K9 |
| SFP Ports | 2 x 1GbE | 2 x 1GbE | 4 x 1GbE (Combo, shared with RJ-45) | 1 x 1GbE (Combo, shared with RJ-45) | 1 x 1GbE (Combo, shared with RJ-45) |
| Switching Capacity | 17.6 Gbps | 17.6 Gbps | 48 Gbps | 3.6 Gbps | 18 Gbps |
| Weight | 2.73 kg | 2.19 kg. | 2.6 kg | 1.02 kg | 1.02 kg |
| Width | 440 mm | 440 mm | 440 mm | 220 mm | 220 mm |
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ESW-520-48P-K9 identifies an ESW 520 switch with 48 Fast Ethernet PoE access ports and four expansion ports: two copper Gigabit ports and two SFP slots. The 48 denotes the access-port count, while P identifies the powered version. Keep the complete PID on the purchase order to distinguish the exact configuration.
ESW-520-48P-K9 is managed through the browser-based ESW 500 Switch Configuration Utility, Cisco Configuration Assistant, and SNMP versions 1, 2, and 3. The web utility supports HTTP/HTTPS access for configuration, monitoring, and maintenance. A console port provides a local access path; administration is not limited to plug-and-play operation.
ESW-520-48P-K9 is retired: end of sale was March 30, 2012, and Cisco support ended March 31, 2017. Purchasing new sealed inventory changes the unit's condition, not the manufacturer's lifecycle. Evaluate continued use as maintenance of a retired installation rather than a supported new deployment.
ORM Systems offers ESW-520-48P-K9 new sealed or certified refurbished, with up to a 3-year extended warranty for new units and up to 1 year for refurbished units. Both conditions include 30-day returns; terms apply. Cisco's original 5-year limited hardware warranty is separate; Cisco service ended March 31, 2017.
ESW-520-48P-K9 provides a shared 370W PoE budget across 48 powered Fast Ethernet access ports, with a maximum of 15.4W on an individual port. The aggregate budget does not support every port at that maximum simultaneously. Sum the connected devices' power requirements before specifying a fully populated deployment.
ESW-520-48P-K9 has four fixed Gigabit uplinks: two 10/100/1000 copper ports and two dedicated SFP slots. The fiber slots do not share their connections with the copper uplinks. Fiber orders require compatible transceivers; MGBSX1 supports multimode fiber, while MGBLX1 supports single-mode fiber. Match both ends of each optical link.
ESW-520-48P-K9 uses an internal AC supply and supports an external RPS1000 connection for power redundancy, rather than a second internal supply module. The AC input accepts 100–240V, and the external redundant input is specified at -48V DC. Include the external power arrangement explicitly when redundancy is required.
ESW-520-48P-K9 fits a 1U rack position and measures 440 mm wide, 375 mm deep, and 44 mm high, with a unit weight of 2.73 kg. Check rack depth, cable clearance, ventilation space, and the included mounting hardware when specifying an installation or a replacement order.
ESW-520-48P-K9 provides PoE on its 48 access ports, whereas ESW-520-48-K9 provides 48 non-PoE access ports. Both belong to the discontinued ESW 500 Series. For legacy replacement, the powered model matches endpoints that rely on inline power; the non-PoE model matches equipment powered separately.
ESW-520-48P-K9 provides 48 Fast Ethernet PoE access ports, while ESW-520-24P-K9 provides 24. Both are discontinued ESW 500 Series models, so the comparison concerns legacy maintenance rather than a current-generation recommendation. Match the 48-port model to higher connection counts and the 24-port model to smaller installed configurations.
United States
