Cisco

Cisco WS-X4908-10G-RJ45 | 8x 10GBASE-T (RJ-45) half card | 10GbE copper, up to 100 m Cat6a/7 | for Catalyst 4900M

Cisco WS-X4908-10G-RJ45 | 8x 10GBASE-T (RJ-45) half card | 10GbE copper, up to 100 m Cat6a/7 | for Catalyst 4900M

SKU:WS-X4908-10G-RJ45

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Description

High-density 10GbE copper expansion for Catalyst 4900M, providing eight RJ‑45 10GBASE‑T ports in a half-card form factor. Ideal for connecting servers or aggregation gear over existing copper cabling up to 100 meters with Cat6a/7. Auto-negotiates down to 1G/100M for flexible interoperability.

Features

- Eight 10GbE copper ports in a single half‑card for dense ToR connectivity
- Leverages existing twisted‑pair cabling to reduce fiber costs
- Auto‑negotiation for seamless interoperability with 1G/100M devices
- Hot‑swappable design minimizes downtime during expansion or replacement
- Integrates with 4900M L2/L3 features for consistent policy and QoS

Warranty

All products sold by XS Network Tech include a 12-month warranty on both new and used items. Our in-house technical team thoroughly tests used hardware prior to sale to ensure enterprise-grade reliability.

All technical data should be verified on the manufacturer data sheets.

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FAQs

Technical Specifications

FAQs

Q: Which chassis does this module fit?
A: It is designed for the Cisco Catalyst 4900M and occupies one half‑slot. Two half cards or one full card can be installed per chassis.

Q: What cable do I need for 10G operation?
A: Use Cat6a or Cat7 for up to 100 m. Cat6 can be used for shorter runs (typically up to 55 m) at 10G.

Q: Does it support 2.5G/5G NBASE‑T speeds?
A: No. It negotiates 10G, 1G, or 100M as supported by the connected device.

Q: Are features like VLANs and routing handled on the module?
A: Feature processing is provided by the 4900M chassis and its IOS feature set; the module provides the physical 10GBASE‑T interfaces.

Q: Is a specific software version required?
A: Use a 4900M IOS release that supports the 10GBASE‑T module; consult the 4900M release notes for minimum versions.

Technical Specifications

- Interface type: 8x 10GBASE‑T (RJ‑45)
- Speeds: 10G/1G/100M auto‑negotiation
- Cabling: Cat6a/7 up to 100 m; Cat6 typically up to 55 m at 10G
- Form factor: half‑card module for Catalyst 4900M chassis (occupies one half slot)
- Use case: top‑of‑rack server connectivity over copper
- Hot-swap: online insertion and removal (OIR) when supported by chassis software
- Compatibility: Cisco Catalyst 4900M only (not for fixed 4900/4948 models)
- Supported features: L2/L3 capabilities provided by the host chassis/IOS
- Environmental: uses 10GBASE‑T PHY; ensure adequate cooling in high‑density deployments

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