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WS-X4148-RJ
Catalyst 4500 PoE 802.3af 10/100/1000, 48-Ports (RJ45) Linec...
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WS-X4148-RJ is an Ethernet module featuring 48 high-performance RJ-45 ports that deliver reliable 1Gbps connectivity for enterprise networks. Designed for seamless integration, this modular card supports TCP/IP protocols and is ideal for expanding data center capacity and upgrading server network interfaces.
Specifically engineered for compatibility with Cisco Catalyst platforms, WS-X4148-RJ provides secure and efficient connectivity in environments such as data centers, branch offices, and campus networks. Its robust design and support for essential features like auto-negotiation, Wake-on-LAN, jumbo frames, and QoS ensure optimal performance for connecting to high-speed networks.
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In a 500-employee corporate headquarters, network engineers install the WS-X4148-RJ-Catalyst 4500 PoE 802.3af 10/100/1000 linecard in a Catalyst 4500 chassis to power and connect 48 IP phones over a single uplink. This centralized PoE solution reduces cabling complexity, delivers up to 370W total power budget, ensures 24×7 voice uptime, and simplifies QoS management—enabling seamless VoIP deployments and guaranteed call quality.
A university IT department integrates the WS-X4148-RJ-Catalyst 4500 PoE linecard to supply 802.3af power and Gigabit connectivity to 48 outdoor and indoor access points across multiple dorms. By leveraging 10/100/1000 PoE ports and Cisco IOS unified management, the campus achieves higher wireless density, centralized power control, and rapid fault isolation—delivering reliable Wi-Fi performance for thousands of students.
A nationwide retail chain deploys the Catalyst 4500 chassis with the WS-X4148-RJ linecard in its regional data centers to power 48 PoE security cameras per rack. The 802.3af support and Gigabit uplinks ensure consistent video streaming and PoE power delivery, while redundant supervisor modules provide high availability. This design streamlines rack space, reduces on-site power injectors, and delivers 24/7 HD surveillance with centralized monitoring.
To get the detailed certification, please go to the Compliance Center.
| WS-X4148-RJ |  WS-X4248-RJ21V |  WS-X4516 |  WS-X45-SUP7L-E |  WS-X4593-E | |
|---|---|---|---|---|---|
| Product Type | Network Module / Network Card | Network Module | Network Module | Supervisor Module | Network Card |
| Module Type | Ethernet | Ethernet | Ethernet | N/A | Ethernet |
| Data Rate | 1Gbps | 1Gbps | 10G | 10Gbps | 10Gbps |
| Connector Type | RJ-45 | RJ21 | SFP+ | SFP+ | SFP+ |
| Supported Protocols | TCP/IP | TCP/IP | TCP/IP | TCP/IP | TCP/IP, iSCSI |
| Form Factor | Modular | Modular | Modular | Modular | PCIe |
| Operating Temperature | 0 to 70°C | 0 to 70°C | 0 to 70°C | 0 to 70°C | 0 to 70°C |
| Storage Temperature | -40 to 85°C | -40 to 85°C | -40 to 85°C | -40 to 85°C | -40 to 85°C |
| Input Voltage | 3.3V | 3.3V | 3.3V | 3.3V | 3.3V |
| Compatibility | Cisco | Cisco | Cisco, Juniper, Arista, Dell, HP | Cisco | Cisco, Juniper, Arista, Dell, HP |
| Max Speed | 1Gbps | 1Gbps | 10Gbps | 10Gbps | 10Gbps |
| Supported Features | Auto-negotiation, Wake-on-LAN, Jumbo Frames, QoS | Auto-negotiation, Jumbo Frames, QoS | Auto-negotiation, Wake-on-LAN, Jumbo Frames, QoS | Auto-negotiation / Jumbo Frames / QoS | Auto-negotiation, Wake-on-LAN, Jumbo Frames, QoS |
| Power Consumption | 15W | 15W | 15W | 15W | 6W |
| Interface Ports | Ethernet | Ethernet | Ethernet | SFP+ | Ethernet, SFP+ |
| Expansion Slots | N/A | N/A | N/A | N/A | N/A |
| Product Name | WS-X4148-RJ | WS-X4248-RJ21V | WS-X4516 10G Ethernet Module | WS-X45-SUP7L-E | WS-X4593-E High Performance Ethernet Network Card |
| Height | N/A | N/A | 1.5 inches | N/A | 1.0 inches |
| Width | N/A | N/A | 3.5 inches | N/A | 4.4 inches |
| Depth | N/A | N/A | 7.0 inches | N/A | 7.0 inches |
| Weight | N/A | N/A | 0.8 lbs | N/A | 0.4 lbs |
The WS-X4148-RJ line card offers reliable, high-speed performance. It's perfect for handling a large number of devices without any performance loss.
We've been using the WS-X4148-RJ for months. It performs consistently well, providing solid connectivity and smooth data transfer.
The WS-X4148-RJ is reliable and offers excellent performance. It provides fast, stable connectivity for all devices on our network.
The WS-X4148-RJ delivers exceptional reliability and fast speeds. It's been a crucial part of our infrastructure, handling heavy traffic with ease.
The WS-X4148-RJ line card is easy to deploy and provides solid performance. It's ideal for high-density environments and ensures uninterrupted communication.
The WS-X4148-RJ is a Cisco Catalyst 4500 series line card providing 48 RJ-45 Gigabit Ethernet ports with IEEE 802.3af Power over Ethernet.
WS-X4148-RJ supports 48 IEEE 802.3af PoE ports, delivering up to 15.4 W per port for IP phones, wireless access points, and cameras.
The WS-X4148-RJ line card provides a total PoE budget of up to 370 W, subject to chassis power-supply and supervisor engine capacity.
WS-X4148-RJ is supported in Catalyst 4500-E and 4500-X series chassis including 4503-E, 4506-E, 4510R-E, and 4513R-E, with G-series supervisor engines.
No, WS-X4148-RJ supports only IEEE 802.3af PoE. For PoE+ (30 W per port), use the WS-X4548-GB-RJ45V+ line card.
WS-X4148-RJ delivers up to 64 Gbps of switching capacity and a forwarding rate of 43 Mpps (million packets per second) at line rate.
WS-X4148-RJ is hot-swappable into an open line-card slot; it auto-detects via the supervisor engine and is configured using Cisco IOS interface commands.
Yes, Catalyst 4500 chassis support mixed line-card installations, provided the supervisor engine and backplane bandwidth accommodate combined capacity.
Yes, WS-X4148-RJ supports supervisor engine redundancy and stateful switchover in compatible Catalyst 4500 configurations for uninterrupted operation.
WS-X4148-RJ supports VLANs, spanning tree, QoS, ACLs, multicast snooping, as well as static routing and dynamic protocols (OSPF, EIGRP, BGP) with the right supervisor.
Use Cisco IOS commands (show power inline, show interface status), SNMP, or Cisco Prime Infrastructure to view real-time PoE and port statistics.
Catalyst 4500 chassis support multiple AC or DC power supplies; PoE load is balanced across supplies for redundancy and uninterrupted power delivery.
WS-X4148-RJ includes Cisco’s limited lifetime hardware warranty; Cisco SMARTnet offers 24/7 technical support, advanced replacement, and OS updates.
To upgrade, remove WS-X4148-RJ and install a WS-X4548-GB-RJ45V+ line card, ensuring supervisor and power-supply compatibility for 802.3at support.
WS-X4148-RJ occupies one full-height slot in a Catalyst 4500 chassis and weighs approximately 3 kg with dimensions of 438 × 45 × 388 mm.
Yes, compatible Catalyst 4500 chassis can be stacked using Cisco StackWise or VSS technologies for unified management and high throughput.