IBM 49Y7888 Compatible 40G QSFP+ to 4xSFP+ DAC Breakout Direct Attach Cable
Best cost-effective breakout solution for IBM network hardware upgrades.
This OptoSpan Direct Attach Cable is a high-performance, cost-effective alternative to the IBM P/N 49Y7888. The 5-meter copper cable is designed for essential 40G to 10G interconnects, featuring a QSFP+ connector that breaks out into four SFP+ connections. It utilizes four independent channels to support multi-gigabit data rates up to an aggregate of 40 Gb/s. Each cable is pre-programmed and rigorously tested to ensure 100% compatibility with specified IBM hardware, providing reliable performance in data center environments. This cable is fully compliant with QSFP+ MSA standards.
$158.25
Owner Satisfaction
4.6
/ 5
Category Rank
1108
/ 6543
#1108 in Network Cables
Price vs Category Average
-56%
Below average
Reach
5
/ Meter
Who it's for
- Budget-conscious IT managers optimizing network infrastructure costs
- Engineers requiring high-speed, low-latency data center performance
- Network administrators maximizing port density in compact server environments
Who should skip it
- IT professionals managing strict, proprietary IBM or Lenovo hardware ecosystems
- Technicians working in extremely tight, high-density server rack configurations
- Network architects needing long-distance connectivity between distant server racks
Performance breakdown
Hardware Compatibility
Pre-programmed firmware ensures seamless integration with IBM networking infrastructure.
Signal Integrity
Reliable data transmission across all four channels at 40Gbps speeds.
Power Efficiency
Minimal power draw reduces thermal load in dense server racks.
Build Durability
Stranded copper construction provides necessary flexibility for tight cable management.
Interconnect Versatility
Efficiently bridges high-density QSFP+ ports to standard SFP+ hardware.
Standard Compliance
Fully adheres to MSA specifications for consistent multi-vendor interoperability.
Key Specs
Reach
5 Meter
Type
QSFP+ to 4xSFP+ DAC
Mode
Copper
Bandwidth
40 Gbps
Maximum aggregate data rate
40 Gb/s
Low power consumption
0.02 W (typ.)
Jacket Material
PVC
Conductor Material
Copper
Features
- Enables 40G to 10G interconnects
- Four independent data channels
- Cost-effective alternative to optics
- Guaranteed compatibility with IBM hardware
- Supports hybrid link lengths up to 5 meters
- Compliant with 10/40 Gigabit Ethernet
- Supports InfiniBand and Fiber Channel
What customers say
This OptoSpan DAC cable earns high praise for its exceptional reliability and outstanding value. Users confirm seamless integration with IBM systems, noting performance identical to costly OEM alternatives. Setup is quick and painless thanks to simple plug and play functionality. It stands out as a dependable, high quality solution for demanding high speed networking, delivering premium performance without the premium price. Customers consistently find this cable offers superior functionality for the cost.
Know before you buy
Yes, this cable is specifically pre-programmed and tested to ensure 100% compatibility with IBM hardware requiring the 49Y7888 part number.
This cable is designed to bridge 40G ports on a switch or router to four individual 10G ports on servers or other network devices, allowing for high-density connectivity.
Yes, in addition to 10/40 Gigabit Ethernet, this cable supports InfiniBand and Fiber Channel protocols, making it versatile for various data center environments.
This direct attach cable is a more cost-effective and energy-efficient alternative to using separate optical transceivers and fiber patch cables for short-reach connections up to 5 meters.
No, the cable is engineered to maintain its full 40 Gb/s aggregate data rate across the entire 5-meter length without signal degradation.
The cable features a round, durable PVC jacket with stranded copper conductors, providing the flexibility needed for organized cable management within server racks.
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