D-Link SFP+ Direct Attach Stacking Cable, 1M DEM-CB100S

D-Link SFP+ Direct Attach Stacking Cable (DEM-CB100S)

The D-Link SFP+ Direct Attach Stacking Cable, model DEM‑CB100S, is a high‑performance, 10 GbE interconnect designed for rapid deployment of network stacks. Its compact 1‑meter length and male/male connector configuration make it ideal for building scalable switch fabrics in data centers, enterprise LANs, and service provider environments.

Key Technical Specifications

• Length: 1 m (100 cm)
• Connector Type: Male/Male SFP+ (M‑M)
• Data Rate: 10 Gbps, 8B/10B encoded
• Maximum Distance: 1 m (within the same chassis or adjacent chassis)
• Color: Black (standard industrial color for cable management)
• Packaging: 10 cables per shipping case, each case weighs 3.8 kg gross and 2.8 kg net
• Case Dimensions: 56.2 cm length × 33.6 cm width × 26.5 cm height
• Palette Width: 120 cm (for efficient warehouse handling)

Design and Construction

The cable employs a Twinaxial copper core with a tightly controlled impedance of 100 Ω, ensuring minimal signal loss over the short 1‑meter span. The outer jacket is made from high‑quality polyethylene (PE), providing excellent mechanical strength while maintaining flexibility for tight routing in dense rack environments.

Both ends feature M/M SFP+ connectors that are fully compatible with D-Link’s X‑Stack and other industry‑standard SFP+ modules. The connectors are engineered to maintain a secure mating force, reducing the risk of intermittent connections during high‑temperature operation.

Performance Characteristics

• Signal Integrity: 10 Gbps transmission with low bit error rate (BER) due to precise impedance matching and copper purity.
• Latency: Sub‑nanosecond propagation delay, ideal for latency‑sensitive applications such as high‑frequency trading or real‑time analytics.
• Power Consumption: Passive cable; no external power required beyond the SFP+ transceiver modules.

Ideal Use Cases

• Switch Stacking: Connect multiple D-Link switches in a single stack to create a unified logical device, simplifying management and increasing bandwidth.
• Data Center Fabric: Build high‑density 10 GbE fabrics where short, reliable links are essential for inter‑switch communication.
• Enterprise LAN Expansion: Quickly extend network reach within a building or campus without the need for fiber cabling.
• Service Provider Edge: Deploy cost‑effective, low‑latency links between edge routers and aggregation switches.

Installation Guidelines

1. Preparation: Verify that both SFP+ ports are clean and free of debris. Use a lint‑free cloth to wipe the connector surfaces if necessary.
2. Mating: Align the male connectors on each end of the cable with the corresponding SFP+ sockets. Gently push until the connectors lock into place; avoid excessive force that could damage the pins.
3. Verification: After insertion, check for proper link status indicators on both switches or devices. A green LED typically signifies a successful 10 GbE connection.
4. Cable Management: Route the cable along designated pathways to avoid sharp bends. Maintain a minimum bend radius of 6 cm to preserve signal integrity.

Maintenance and Troubleshooting

• Regular Inspection: Periodically inspect cables for visible damage such as cuts, kinks, or connector wear. Replace any compromised cable immediately.
• Link Status Monitoring: Use network management software to monitor link health. A sudden loss of link may indicate a faulty connector or damaged cable segment.
• Environmental Considerations: Keep cables away from sources of electromagnetic interference (EMI) and avoid exposure to extreme temperatures beyond the specified operating range.

Compatibility Summary

The D-Link DEM‑CB100S is engineered for seamless integration with D-Link’s X‑Stack series, including models such as the DGS‑3420‑28, DGS‑3420‑52, DGS‑3620‑28, and DGS‑3620‑52. Its male/male SFP+ connectors also support a wide range of third‑party SFP+ transceivers that adhere to IEEE 802.3ae specifications.

Conclusion

The D-Link SFP+ Direct Attach Stacking Cable (DEM‑CB100S) delivers reliable, high‑speed connectivity in a compact form factor. Its robust construction, precise impedance control, and straightforward installation make it an essential component for building scalable, low‑latency network infrastructures.