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WS-C3550-24PWR-EMI
Cisco WS-C3550-24PWR-EMI Catalyst 3550 24-Port Fast Ethernet...
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WS-C3550-24PWR-EMI combines 24 Fast Ethernet inline-power ports with Layer 3 switching and two fixed Gigabit Ethernet GBIC uplink positions in a rack-mount chassis. The Catalyst 3550-24 PWR connects compatible IP phones, wireless access points, and data endpoints where existing access connections operate at 10/100 Mbps. Its uplink cages accept GBIC transceivers rather than a removable network-module card, allowing copper or fiber connections according to the selected transceiver. The discontinued WS-C3550-24-EMI retains the same access-port density but omits inline power. Cisco Catalyst 3550 switching provides traffic classification, rate limiting, and access control lists for installations retaining these functions at the access edge. This is legacy hardware for an existing configuration, not a native Gigabit copper access switch.
WS-C3550-24PWR-EMI price for new stock is is available on request. Get immediate quote. WS-C3550-24PWR-EMI refurb price is $228.38.
Request bulk order quote for WS-C3550-24PWR-EMI for additional pricing. Browse the full Cisco 3550 Catalyst Switches series or explore all Cisco products.
8.8 Gbps switching capacity serves the access and uplink interfaces, while 6.6 Mpps forwarding with 64-byte packets defines the packet-processing ceiling. OSPF and EIGRP support dynamic IPv4 routing under the enhanced image, alongside static routing, RIP, PIM, and HSRP for unicast, multicast, and gateway-redundancy configurations. Configurable limits reach 16000 unicast routes and 8000 MAC addresses, with SDM templates allocating resources to the selected switching or routing role. WS-C3550-24PWR-EMI carries 64 MB of DRAM and 16 MB of flash for software operation and image storage. Administrators can use the console, CLI access through SSH or Telnet, and SNMPv1/v2c/v3 for configuration and monitoring. RSTP and PVST+ provide spanning-tree controls, while RSPAN supports remote traffic observation. 525W maximum consumption must be included when sizing the rack's AC feed, and the 0°C to 45°C operating range bounds the installation environment.
ORM Systems offers WS-C3550-24PWR-EMI in new sealed and certified refurbished condition; specify the required 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, clean boot, and PoE output under load on every powered port; firmware is verified and configuration wiped to factory default. ORM warranty coverage is up to a 3-year extended term for new units and up to 1 year for certified refurbished units, with 30-day returns on every condition, terms apply; Cisco's original limited lifetime coverage has ended. Enterprise and volume orders accept POs, government Net-30, and RMA with advance replacement across the UK, EU, US, and MEA.
| Key Specs | Key Spec Values |
|---|---|
Operating System | Cisco IOS |
License Tier | Enhanced Multilayer Software Image (EMI) |
Port Configuration | 24 x 10/100 inline power / 2 x 1G GBIC |
Stacking | GigaStack / 9 members |
Max Power Draw | 525W |
When replacing a powered legacy access switch, retain the endpoint power inventory rather than choosing by connector count alone. Each powered port is rated for 15W, so higher-demand endpoints require separate consideration. Confirm detection compatibility and per-device requirements before specifying the replacement unit on the purchase order.
When reproducing an existing configuration in a lab, packet buffering and queue behavior matter alongside the software image. The shared packet buffer is 2 MB, and each port supports four egress queues. Specify these constraints in the test plan before ordering hardware for traffic-policy validation.
When retaining browser-based administration across an existing switch estate, Cisco Cluster Management Suite can manage 16 supported switches through one IP address. That management cluster is separate from the physical interconnect arrangement. Confirm the existing browser environment, management access, and cluster membership requirements before specifying additional legacy units.
Native Gigabit Ethernet endpoint connections
The copper access ports operate at 10/100 Mbps, not 1Gbps. Gigabit Ethernet is available through the GBIC uplink positions rather than the endpoint-facing RJ-45 ports.
10G uplinks to distribution
The uplink positions support Gigabit Ethernet GBICs, with a maximum uplink speed of 1Gbps per position. They do not provide 10G uplink connectivity.
Powered endpoints requiring above 15W
The inline-power rating is 15W per powered access port. Endpoints requiring more power exceed that rating and need a different power arrangement.
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| WS-C3550-24PWR-EMI |  WS-C3550-12G |  WS-C3550-48-EMI |  WS-C3550-24PWR-SMI |  WS-C3550-48-SMI | |
|---|---|---|---|---|---|
| Ethernet Technology | Fast Ethernet | Gigabit Ethernet | Fast Ethernet | Fast Ethernet | Fast Ethernet |
| Flash Memory | 16 MB | 16 MB | 16 MB | 16 MB | 16 MB |
| Form Factor | Rack-Mount 1U | Rack-Mount 1.5U | Rack-Mount 1U | Rack-Mount 1U | Rack-Mount 1U |
| Height | 44.5 mm | 67 mm | 44.5 mm | 44.5 mm | 44.5 mm |
| Manufacturer Part Number | WS-C3550-24PWR-EMI | WS-C3550-12G | WS-C3550-48-EMI | WS-C3550-24PWR-SMI | WS-C3550-48-SMI |
| Memory | 64 MB | 64 MB | 64 MB | 64 MB | 64 MB |
| Power Consumption | 525W | 190W | 110W | 525W | 86W |
| Switching Capacity | 8.8 Gbps | 24 Gbps | 13.6 Gbps | 8.8 Gbps | 13.6 Gbps |
| Weight | 6.35 kg | 7.26 kg | 5.9 kg | 6.35 kg | 5.9 kg |
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.
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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.
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WS-C3550-24PWR-EMI identifies a Catalyst 3550 switch with 24 10/100 access ports, integrated inline power, and the Enhanced Multilayer Software Image. WS-C3550 names the switch family, 24 is the access-port count, PWR denotes inline power, and EMI selects enhanced routing; two GBIC uplinks are included in this configuration.
WS-C3550-24PWR-EMI is managed through Cisco IOS CLI, a console connection, SSH or Telnet, browser-based Cisco Cluster Management Suite, and SNMPv1/v2c/v3. CMS can manage a cluster through one IP address. Management access and encryption support should be checked against the installed software image before the unit is accepted.
WS-C3550-24PWR-EMI is discontinued, and the Catalyst 3550 family is retired rather than a current Cisco-supported product. A sealed unit does not change that lifecycle position. Treat an order as a legacy hardware purchase and separate the reseller's coverage from Cisco manufacturer support when defining acceptance requirements.
WS-C3550-24PWR-EMI ships with EMI, the Enhanced Multilayer Software Image, rather than SMI. The legacy SMI-to-EMI upgrade path uses CD-3550-EMI=; matching the chassis alone does not establish the installed feature set. Specify EMI explicitly and verify the running image when purchasing replacement hardware.
WS-C3550-24PWR-EMI provides up to 15W of inline power per powered access port. That rating is distinct from the 525W maximum input figure, which includes the switch's own operation. Confirm the endpoint's power requirement and detection compatibility before treating a replacement phone or access point as interchangeable.
The Catalyst 3550-24 PWR supports two Gigabit Ethernet GBIC uplink positions for compatible copper or fiber transceivers. WS-G5484 provides a multimode 1000BASE-SX connection, while WS-G5486 provides 1000BASE-LX/LH connectivity. Select the GBIC against the remote interface, fiber type, and required distance rather than ordering an SFP for these cages.
GigaStack connects nine Catalyst 3550 members in a daisy chain with 1Gbps forwarding bandwidth; a point-to-point connection supports 2Gbps. WS-X3500-XL supplies the GigaStack interface. Interconnect choices include CAB-GS-50CM and CAB-GS-1M, so the connection hardware and physical cable lengths must be specified alongside the switches.
Yes, WS-C3550-24PWR-EMI supports Layer 3 IPv4 routing through its enhanced software image, including OSPF and EIGRP. Static routing, RIP, PIM, and HSRP are also supported. The configurable unicast route maximum is 16000, with SDM resource allocation affecting the selected switching and routing configuration.
No, WS-C3550-24PWR-EMI does not have a second internal power-supply bay for redundant modules. Backup power uses an external compatible redundant power system instead. PWR675-AC-RPS-N1= supports this model, but that external arrangement must not be confused with two internal supplies shipped in the chassis.
WS-C3550-24PWR-EMI supplies inline power on its access ports, while WS-C3550-24-EMI does not. Both are discontinued members of the retired Catalyst 3550 family. For legacy restoration, the powered model matches compatible powered endpoints; the nonpowered model matches an existing configuration where endpoint power is supplied separately.
WS-C3550-24PWR-EMI includes enhanced IP routing, while WS-C3550-24PWR-SMI starts with the standard image and basic static and RIP routing. Both models are discontinued. The EMI configuration suits restoration of advanced routed configurations; the SMI configuration matches legacy installations whose software requirement remains the standard feature set.
WS-C3550-48-EMI provides 48 Fast Ethernet access ports, compared with 24 on WS-C3550-24PWR-EMI. Both models are discontinued, so this is a legacy configuration comparison rather than a current-generation upgrade path. The 48-port model matches a larger existing port footprint; the 24-port model matches a smaller replacement requirement.
ORM Systems offers WS-C3550-24PWR-EMI new sealed or certified refurbished, with up to a 3-year extended warranty for new units and up to 1 year for refurbished units. Every condition includes 30-day returns, terms apply. Cisco's original limited lifetime warranty does not provide continuing manufacturer coverage for this retired switch.
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