Product Highlights
Better Performance
High speeds of up to 40 Gbps and lower latency result
in faster transmissions than other types of cables
Cost-effective Solution
QSFP+ connector on cable replaces four standard
SFP+ cable assemblies, ensuring higher port density
and cost savings
Energy Efficiency
Lower power consumption and EMI emissions means
savings on energy usage and expenses, and less
electronic interference
QSFP+ Direct Attach Cable Series
40G Passive QSFP+ Twinaxial Direct Attach Cable
Features
The 40G Passive QSFP+ Twinaxial Direct Attach Cable is a high performance, high
Connectivity
The 40G Passive QSFP+ Twinaxial Direct Attach Cable is designed to support high-density
bandwidth and cost-effective connection solution that supports 40G Gigabit Ethernet.
• QSFP+ (Quad Enhanced Small Form-factor
Pluggable)
connections for switches with 40G interface, much faster than SFP+. There are three cable
• 40 Gbps Gigabit Ethernet
The DEM-CB100QXS-4XS QSFP+ to 4X SFP+ one-meter cable features a QSFP+ connector on
• Three different models
one end, and four SFP+ connectors on the other end, allowing it to connect to up to four 10G
models, including the DEM-CB100QXS (one meter) and the DEM-CB300QXS (three meter).
• DEM-CB100QXS: 1 meter
servers. The 40G Passive QSFP+ Twinaxial Direct Attach Cable is certified to be compatible with
• DEM-CB300QXS: 3 meters
D-Link products to provide you best performance and reliability.
• DEM-CB100QXS-4XS (QSFP+ to four 10G SFP+
cable): 1 meter
Ideal for High-Bandwidth Operations
• Fully Compliant with the following standards:
• SFP MSA (Multi-Source Agreement)
• EIA 364
• UL 94
• SFF-8436
The 40G Passive QSFP+ Twinaxial Direct Attach Cable supports speeds of up to 40 Gbps, while
having lower crosstalk and power consumption than other cables. This makes it an optimal
solution for handling high bandwidth transmission within short distances such as within a rack
or between racks inside energy-efficient data centers.
• SFF-8431
Quad Small Form-factor Pluggable Plus Format
• EIA-364-1000.01
The D-Link 40G Passive QSFP+ Twinaxial Direct Attach Cable uses Quad Small Form-factor
Pluggable Plus format (QSFP+) connectors, which integrate four transmitting and four receiving
channels. The QSFP+ cable assemblies can replace four standard SFP+ cable assemblies,
resulting in higher port density, cost efficiency, and a reduction in power savings compared
to standard SFP+.
Save on Costs
The D-Link 40G Passive QSFP+ Twinaxial Direct Attach Cable features QSFP+ connectors on
both ends, thus eliminating the need for expensive QSFP+ transceivers. This makes it more
cost-effective than fiber cables which must use QSFP+ transceivers.
QSFP+ Direct Attach Cable Series
40G Passive QSFP+ Twinaxial Direct Attach Cable
Technical Specifications
General
Device Rate
• 40 Gbps Gigabit Ethernet
Connector Type
• QSFP+ Cable Assembly
Wire AWG
• 30 AWG
Physical
Minimum Cable Bend Radius
• DEM-CB100QXS, DEM-CB300QXS: 32 mm (1.26 inches)
Cable Characteristic Impedance
• 100 Ohms
Voltage
• 30 V AC
Current
• 0.5 A
Temperature
• Operating: -40 to 85 °C (-40 to 185 °F)
Certifications
• SFP MSA (Multi-Source Agreement)
• EIA-364-1000.01
• SFF-8436
• DEM-CB100QXS-4XS: 23.5 mm (0.93 inches)
• EIA 364
• UL 94
• SFF-8431
Order Information
Model Number
Description
DEM-CB100QXS
1 meter 40G Passive QSFP+ Twinaxial Direct Attach Cable
DEM-CB300QXS
3 meter 40G Passive QSFP+ Twinaxial Direct Attach Cable
DEM-CB100QXS-4XS
1 meter 40G Passive QSFP+ to 4X 10G SFP+ Twinaxial Direct Attach Cable
Updated 2013/02/01
Specifications are subject to change without notice. D-Link is a registered trademark of D-Link
Corporation and its overseas subsidiaries. All other trademarks belong to their respective owners.
©2013 D-Link Corporation. All rights reserved. E&OE.