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by Cisco
Product Line: Cisco Data Center Switches
Product Type: DS-CWDM4G1550
Original price $0.00 - Original price $101.00
Original price
$0.00 - $101.00
Current price $101.00
Title: Used

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Product Description

The DS-CWDM4G1550 is designed for Cisco MDS 9000 Series Director Switching Modules and Fabric Switch Ports, featuring a 1550 nm wavelength and Dual LC connector, supporting fiber channels with speeds of 1/2/4 Gbps. It operates within a temperature range of 0 °C to 70 °C, with a storage temperature range of -40 °C to 85 °C, ensuring reliable performance across diverse environmental conditions. The module boasts a Side Mode Suppression Ratio of 30 dB, a Link Budget of 17.8 dB, and a Dispersion Penalty of 3 dB at 25 km, optimized for high-quality, long-distance data transmission.

Key Feature for the DS-CWDM4G1550

  • What is the operating wavelength of the SFP module?
  • The operating wavelength of the SFP module is 1550 nm.

  • What are the supported speeds for part number SFP?
  • It supports 1/2/4 Gbps speeds.

  • What connector type does the SFP module use?
  • The SFP module uses a Dual LC connector.

  • What is the minimum operating temperature for part number SFP?
  • The minimum operating temperature is 0 °C.

  • Can the SFP module be used with Cisco MDS 9000 Series Director Switching Modules?
  • Yes, it is compatible with Cisco MDS 9000 Series Director Switching Modules and Fabric Switch Ports.

  • What is the Side Mode Suppression Ratio (SMSR) for part number SFP?
  • The SMSR is a minimum of 30 dB.

  • What color is the SFP module?
  • The SFP module is yellow.

  • What is the maximum storage temperature for part number SFP?
  • The maximum storage temperature is 85 °C.

  • What is the link budget of the SFP module?
  • The link budget of the SFP module is 17.8 dB.

  • What laser class is the SFP module certified under?
  • The SFP module is certified under Laser Class I 21CFR1040.

Product Review

The Cisco DS-CWDM4G1550 offers a flexible speed range of 1/2/4 Gbps, catering to various network demands and is compatible with Cisco MDS 9000 Series, enhancing its utility in diverse networking environments. However, its operational temperature range from 0 °C to 70 °C might limit deployment in environments with extreme temperatures. Additionally, the product's minimum side mode suppression ratio of 30 dB and link budget of 17.8 dB ensure reliable signal quality and strength over fiber channels, though the dispersion penalty at 25 km indicates potential limitations for longer distance applications.


The Cisco DS-CWDM4G1550 is a specialized networking module designed to meet the needs of high-capacity data transmissions through fiber-optic channels. Operating on a 1550 nm wavelength, this device is engineered to support a variety of speeds, including 1, 2, and 4 Gbps, making it versatile for different network demands. Its form factor is an SFP (Small Form-factor Pluggable) which allows for easy insertion and compatibility with a wide range of networking equipment, specifically designed for use with Cisco MDS 9000 Series Director Switching Modules and Fabric Switch Ports. This module comes in a distinct yellow color, indicative of its operating wavelength, which aids in easy identification and management within a network setup. It adheres to the Laser Class I 21CFR1040 safety standard, ensuring safe operation within its intended environments. The hardware is built to function optimally within a broad temperature range, from a minimum operating temperature of 0 °C to a maximum of 70 °C. This wide operating temperature range is complemented by an even broader storage temperature spectrum, from -40 °C to 85 °C, ensuring the device's integrity and performance over a wide variety of environmental conditions. The Cisco DS-CWDM4G1550 boasts a minimum Side Mode Suppression Ratio (SMSR) of 30 dB, which is critical for maintaining signal quality and integrity over the fiber channel. The device's optical power outputs are finely tuned for optimal performance, with the transmitter's optical power ranging from 1.0 dBm to a maximum of 5.0 dBm. The receiver's sensitivity, on the other hand, is designed to operate efficiently within a power range of -15.7 dBm to 0 dBm. This sensitivity is crucial for ensuring that signal integrity is maintained even at the lower end of the power spectrum. Furthermore, the module offers a link budget of 17.8 dB, providing a good margin for maintaining signal quality over distances. The transmitter's extinction ratio stands at 4 dB, and the device is designed to incur a dispersion penalty of only 3 dB at distances up to 25 km, facilitating reliable long-distance communication without significant loss of signal quality. Equipped with a dual LC connector, the Cisco DS-CWDM4G1550 ensures easy and secure connections to network cables. The hardware dimensions are compact, with a height of 8.46 mm, a width of 13.27 mm, and a depth of 56.64 mm, allowing for efficient use of space within networking equipment.
  • Supports 1/2/4 Gbps speeds for versatile network demands.
  • Dual LC connector for easy and secure cable connections.
  • Optimized for use with Cisco MDS 9000 Series for seamless integration.
In summary, the Cisco DS-CWDM4G1550 is a high-performance SFP module designed for efficient and reliable data transmission over fiber networks. Its specifications are tailored to provide high-quality signal transmission, ensuring that network operations are maintained at optimal levels across a range of environmental conditions and distances.


Item Number Cisco DS-CWDM4G1550
Manufacturer Cisco
Operating Wavelength 1550 nm
Interface Type SFP
Transmission Medium Optical Fiber
Data Rate 1/2/4 Gbps
Enclosure Color Yellow
Laser Safety Rating Class I 21CFR1040
Lowest Operating Temperature 0 °C
Highest Operating Temperature 70 °C
Lowest Storage Temperature -40 °C
Highest Storage Temperature 85 °C
Side Mode Suppression Ratio >30 dB
Lowest Output Power (Transmitter) 1.0 dBm
Highest Output Power (Transmitter) 5.0 dBm
Lowest Input Power (Receiver) -15.7 dBm
Highest Output Power (Receiver) 0 dBm
Optical Budget 17.8 dB
Minimum Extinction Ratio 4 dB
Dispersion Tolerance at 25 km 3 dB
Connection Interface Dual LC
Physical Height 8.46 mm
Physical Width 13.27 mm
Physical Depth 56.64 mm
Compatibility Cisco MDS 9000 Series Director Switch Modules, Fabric Switch Ports

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