D-link Systems,inc. DEM-CB300QXS 40G Dac Cable

Product Description

The D-LINK SYSTEMS,INC. DEM-CB300QXS is a 40G Direct Attach Copper (DAC) cable designed for high-speed network infrastructure deployments. This passive twinax assembly delivers 40 Gigabit Ethernet connectivity at a length of 3 meters (approximately 118 inches), making it a cost-effective alternative to fiber-based optical transceivers in short-reach switch-to-switch or switch-to-server applications. Network engineers and data center technicians install this cable where low latency and minimal power consumption are priorities in structured cabling and top-of-rack connectivity setups.

The DEM-CB300QXS is suited for enterprise data center environments where high-density 40G switching infrastructure requires reliable, fixed-length direct attach interconnects. Typical installation scenarios include connecting 40G-capable switches, routers, and servers within the same rack or across adjacent racks. This cable is categorized under enterprise media converters and is sold as a single unit per order.

Key Features

• 40G DAC twinax construction for high-bandwidth, low-latency connectivity
• 3-meter cable length suits same-rack and adjacent-rack deployments
• Passive design eliminates active components, reducing power draw
• Plug-and-play installation with no additional transceivers required
• Cost-effective alternative to active optical cables in short-reach applications

Compatibility

Designed as an OEM-style direct attach copper interconnect for 40G-capable enterprise switching and server platforms compatible with the DEM-CB300QXS form factor.

Installation Notes

Installation is performed by qualified network engineers or structured cabling technicians. Power down or place the target ports in an administratively disabled state before seating or removing DAC cables to avoid interface errors. Verify that the connected devices support the 40G QSFP DAC form factor before installation. Follow applicable data center cabling standards and manufacturer port density guidelines when routing cables in high-density enclosures.