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WS-X6148-RJ-21
Catalyst 6500 48-Port 10/100 Upgradable to Voice, RJ-21
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WS-X6148-RJ-21 is a high-performance Ethernet module engineered for demanding network environments. It features a robust design with support for 10Gbps data rates through its integrated RJ-45 connector, making it an ideal choice for upgrading network interfaces in routers, switches, and servers. The module adheres to industry-standard form factors, ensuring simple PCIe installation and broad compatibility with leading networking hardware brands.
This module supports essential protocols such as TCP/IP and iSCSI, providing reliable and secure data communication for data centers and enterprise networks. With use cases that include expanding data center capacity and connecting high-speed networks, WS-X6148-RJ-21 stands out as a state-of-the-art solution designed to meet the evolving needs of modern digital infrastructures.
WS-X6148-RJ-21 price is $866.00, a 85.6% saving from the Cisco list price of $5,995.00. WS-X6148-RJ-21 is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for WS-X6148-RJ-21 for additional pricing. Browse the full Cisco 6500 Switch Modules series or explore all Cisco products.
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| WS-X6148-RJ-21 |  FAN-MOD-4HS |  WS-X6148A-GE-45AF |  WS-X6708-10G-3C |  WS-SVC-NAM-1-250S | |
|---|---|---|---|---|---|
| Product Type | Network Module / Network Card | Network Module | Network Module / Network Card | Network Module | Network Module |
| Module Type | Ethernet | Ethernet | Ethernet | Ethernet | Ethernet |
| Data Rate | 10Gbps | 10G | 1Gbps | 10Gbps | 1Gbps |
| Connector Type | RJ-45 | SFP+ | RJ-45 | SFP+ | RJ-45 |
| Supported Protocols | TCP/IP, iSCSI | TCP/IP | TCP/IP, UDP | TCP/IP | TCP/IP, iSCSI |
| Form Factor | PCIe | PCIe | 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, Juniper, Arista, Dell, HP | Cisco / Juniper / Arista / Dell / HP | Cisco | Cisco | Cisco, Juniper, Arista, Dell, HP |
| Max Speed | 10Gbps | 10Gbps | 1Gbps | 10Gbps | 1Gbps |
| Supported Features | Auto-negotiation, Wake-on-LAN, Jumbo Frames, QoS | Auto-negotiation / Wake-on-LAN / Jumbo Frames / QoS | Auto-negotiation, Wake-on-LAN, Jumbo Frames, QoS | Auto-negotiation / Jumbo Frames / QoS | Auto-negotiation, Jumbo Frames, QoS |
| Power Consumption | 10W | 15W | 15W | N/A | N/A |
| Interface Ports | Ethernet | Ethernet | Ethernet | SFP+ | Ethernet |
| Expansion Slots | N/A | N/A | N/A | N/A | N/A |
| Product Name | WS-X6148-RJ-21 | FAN-MOD-4HS | WS-X6148A-GE-45AF | WS-X6708-10G-3C Ethernet Module | WS-SVC-NAM-1-250S |
| Height | 1.15 inches | 0.5 inches | N/A | N/A | N/A |
| Width | 4.72 inches | 3.0 inches | N/A | N/A | N/A |
| Depth | 7.87 inches | 0.5 inches | N/A | N/A | N/A |
| Weight | 1.2 lbs | 0.3 lbs | N/A | N/A | N/A |
The WS-X6148-RJ-21 card offers excellent PoE support. It provides reliable, fast Ethernet connectivity and integrates seamlessly with our network.
This module performs flawlessly. The WS-X6148-RJ-21 delivers stable, fast Ethernet connections, making it perfect for expanding our network.
The WS-X6148-RJ-21 is a great addition to our network infrastructure. It provides excellent Ethernet connectivity with PoE support, making it ideal for high-density environments.
The WS-X6148-RJ-21 has been a reliable and cost-effective solution for our network. It offers excellent performance and power over Ethernet support.
We rely on the WS-X6148-RJ-21 for high-speed Ethernet connectivity. It integrates well into our network and ensures stable performance under heavy traffic.
The WS-X6148-RJ-21 is a 48-port 10/100 Ethernet line card for Cisco Catalyst 6500 series switches, upgradable to support voice connections via an RJ-21 interface.
The module provides 48 dedicated 10/100 Mbps Ethernet ports for data connectivity, supporting high‐density access.
Yes, the WS-X6148-RJ-21 can be upgraded with a voice daughter card (WS-X6K‐VXC) to convert all 48 ports for Cisco IP telephony.
The module uses a single RJ-21 connector, simplifying cabling by aggregating 48 voice or data lines into one interface.
Yes, it is compatible with Catalyst 6500 SUP2, SUP32, SUP720, and SUP720-3BXL supervisor engine families when running supported IOS versions.
No, the WS-X6148-RJ-21 does not support PoE. For PoE functionality, use a WS-X6148A-RJ-21-P or PoE-capable line card.
Each port supports 10 Mbps half- or full-duplex and 100 Mbps half- or full-duplex operation.
The module consumes approximately 100 watts under full load, varying slightly based on configuration and traffic.
Slide the module into an available line card slot, secure the retention latches, and connect the RJ-21 cable; no special tools are required.
The module measures 4.5” H x 13.4” W x 16.0” D and weighs approximately 5.5 pounds (2.5 kg).
No additional licenses are needed for standard Layer 2 data forwarding; advanced features may require Cisco DNA licensing.
The WS-X6148-RJ-21 has an MTBF of over 100,000 hours under typical operating conditions.
The module is supported on Cisco IOS 12.2(33)SXH, 12.2(25)SB, 15.x and newer Catalyst 6500 series releases.
Yes, it carries Cisco’s limited lifetime warranty, which includes hardware replacement and online technical support for covered defects.
No, the WS-X6148-RJ-21 uses integrated RJ-21 circuitry and does not accept external SFP or GBIC transceivers.
All datasheets, configuration guides, and TAC support resources are available on Cisco’s official website at cisco.com/go/6500.