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Product Description

Cisco P/N: QSFP-4SFP10G-CU5M
40GBASE-CR4 QSFP+ to four 10GBASE-CU SFP+ direct attach breakout cable assembly, 5 meter passive
Data Rate:40Gb/s
Cable Type: Passive Twinax

Data Center Switching
Cisco Nexus 3000 Series
Cisco Nexus 5000 Series
Cisco Nexus 6000 Series
Cisco Nexus 7000 Series
Cisco Nexus 9000 Series (Modular 9500)
Cisco Nexus 9000 Series (Fixed 9300)
Cisco Nexus 9000 Series (Modular 9500)ACI Mode
Cisco Nexus 9000 Series (Fixed 9300)ACI Mode
Catalyst 6500 Series
Catalyst 4500 Series
Catalyst 4500-X Series
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Cisco Unified Computing System
CRS Router Series
ASR 9000 Series Router
NCS 6000 Router

10Gtek's QSFP+ to 4x SFP+ copper DAC cable is a 40GBase QSFP+ hybrid passive cable.

Fully compliant to the latest SFP+ amp; QSFP MSA (Multi-Source-Agreement).
Supports all current 10-Gigabit Ethernet and 40-Gigabit Ethernet standards.

A side is a QSFP+ connector, B side is 4 pcs SFP+ connectors.

It's an application for link with QSFP+ port on 40Gb/s rate switch or host and feed up to 4 upstream 10Gb/s switch or host.

10Gtek QSFP+ to 4x SFP+ copper breakout DAC cable allows a 40G Ethernet port to be used as four independent 10G ports thus providing increased density while permitting backward compatibility and a phased upgrade of equipment.

As a lower cost alternative to MTP/MPO breakouts for short reach applications up to 5 meters, it helps IT organizations achieve new levels of infrastructure consolidation while expanding application and service capabilities.

40G QSFP+ to 4xSFP+ Breakout DAC - 40GBASE-CR4 Passive Direct At

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Scientific Data for Research






Sea Ice


Ice Shelves


Soil Moisture


Frozen Ground

Advancing knowledge of Earth's frozen regions

NSIDC manages and distributes scientific data, creates tools for data access, supports data users, performs scientific research, and educates the public about the cryosphere.

Arctic Sea Ice News & Analysis

Scientific analysis of Arctic sea ice conditions plus daily images

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Working together to understand the changing Arctic system

Snow Today

Scientific analysis of snow conditions in the Western United States plus daily images


NASA Earth science data on snow, ice, cryosphere, and climate

Visit the Cryosphere

Facts, photos and educational resources about Earth's frozen regions

Greenland Today

Daily surface melt images from NASA data, and scientific analysis


22 September 2021

Arctic sea ice has likely reached its minimum extent for the year, at 4.72 million square kilometers (1.82 million square miles) on September 16, 2021, according to scientists at the National Snow and Ice Data Center (NSIDC) at the University of Colorado Boulder. The 2021 minimum is the twelfth lowest in the nearly 43-year satellite record. The last 15 years are the lowest 15 sea ice extents in the satellite record. 

14 September 2021

Each September, the National Snow and Ice Data Center (NSIDC) at the University of Colorado Boulder informs the public of the annual Arctic sea ice minimum extent, an indicator of how climate change is affecting the Arctic, the fastest-warming region of the globe.

Scientists at Northern Arizona University, Arizona State University, the Arizona Geological Survey at the University of Arizona, and the National Snow and Ice Data Center at the University of Colorado Boulder have been awarded almost $2 million from the National Science Foundation (NSF) to develop a virtual reality teaching tool called Polar Explorer.

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The National Snow and Ice Data Center (NSIDC) announced this week their participation in the 50x30 Coalition, a group of governments and cryosphere and emissions research institutions endorsing the need to reduce greenhouse gas emissions 50 percent by 2030. The Coalition’s founding members endorse the scientific consensus that failure to reach this milestone will result in temperature “overshoot,” in which emissions remain too high to hold Earth within 1.5 degrees Celsius of pre-industrial levels, leading to major and irreversible damages to the environment. Damage may be especially harmful for highly temperature-sensitive frozen components of the Earth system, with impacts ranging from sea level rise to infrastructure damage to food insecurity.

Arctic sea ice has likely reached its maximum extent for the year, at 14.77 million square kilometers (5.70 million square miles) on March 21, 2021, according to scientists at the National Snow and Ice Data Center (NSIDC) at the University of Colorado Boulder. The 2021 maximum is tied with 2007 for seventh lowest in the 43-year satellite record. 


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22 September 2021

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