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by Cisco
Product Line: Cisco Data Center Switches
Product Type: Module
Original price $0.00 - Original price $100.00
Original price
$0.00 - $100.00
Current price $100.00
Title: Used

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Product Description

The DS-CWDM4G1590 is a Cisco-compatible transceiver that operates at a wavelength of 1590 nm and supports data rates of 1/2/4 Gbps over fiber channels with a dual LC connector. It is designed for use with Cisco MDS 9000 Series Director Switching Modules and Fabric Switch Ports, ensuring compatibility and seamless integration. The device maintains a transmitter optical output power range between 1.0 dBm and 5.0 dBm, and can operate within a temperature range of 0 °C to 70 °C, with a storage temperature tolerance between -40 °C to 85 °C.

Key Feature for the DS-CWDM4G1590

  • What is the operating wavelength of the SFP module?
    The operating wavelength is 1590 nm.
  • Can this module be used with Cisco MDS 9000 Series Director Switching Modules?
    Yes, it is designed for use with Cisco MDS 9000 Series Director Switching Modules and Fabric Switch Ports.
  • What types of networks is the SFP compatible with in terms of speed?
    It supports 1/2/4 Gbps network speeds.
  • What is the minimum operating temperature for this SFP?
    The minimum operating temperature is 0 °C.
  • What is the maximum storage temperature the SFP can withstand?
    The maximum storage temperature is 85 °C.
  • What color is the SFP module?
    The module is red.
  • What is the Side Mode Suppression Ratio (SMSR) of the transmitter?
    The SMSR is a minimum of 30 dB.
  • What laser class does the SFP module belong to?
    It belongs to Laser Class I according to 21CFR1040.
  • What is the Link Budget of the SFP module?
    The Link Budget is 17.8 dB.
  • What type of connectors does this SFP module use?
    It uses Dual LC connectors.

Product Review

The Cisco DS-CWDM4G1590 offers a flexible range of speeds from 1 to 4 Gbps, suitable for various applications within the Cisco MDS 9000 Series, enhancing its compatibility and utility in diverse networking environments. However, its operating temperature range is limited to 0 °C to 70 °C, potentially restricting its deployment in extreme conditions without additional climate control measures. Additionally, the product boasts a solid link budget of 17.8 dB and a side mode suppression ratio of 30 dB, ensuring reliable signal quality and strength over fiber channels, but the dispersion penalty at 25 km indicates potential performance degradation over longer distances.


The Cisco DS-CWDM4G1590 is a specialized networking hardware component designed for use in high-demand data communication environments. This device operates at a wavelength of 1590 nm and is compatible with SFP port types, making it a versatile option for various networking setups. It supports fiber channel types, ensuring high-speed data transmission rates of 1/2/4 Gbps. Its compact design, with dimensions of 8.46 mm in height, 13.27 mm in width, and 56.64 mm in depth, allows for easy installation in space-constrained areas. This product is specifically engineered for compatibility with Cisco MDS 9000 Series Director Switching Modules and Fabric Switch Ports, ensuring seamless integration into existing Cisco networking infrastructures. The device features a dual LC connector, facilitating a straightforward connection process with fiber optic cables. It is designed to operate efficiently within a broad temperature range, from a minimum operating temperature of 0 °C to a maximum of 70 °C. This wide operating temperature range ensures reliability and performance stability under various environmental conditions. The DS-CWDM4G1590 is characterized by its red color and adheres to the Laser Class I 21CFR1040 safety standards, highlighting its compliance with strict safety regulations. Its performance is underscored by a side mode suppression ratio of at least 30 dB, ensuring clear signal transmission by minimizing interference. The device boasts a minimum transmitter optical output power of 1.0 dBm and can reach up to 5.0 dBm, while the receiver optical output power ranges from -15.7 dBm to 0 dBm. This range in output power capabilities allows for flexible adaptation to diverse network demands. Optimal performance is further ensured by a link budget of 17.8 dB and a transmitter extinction ratio of 4 dB. The DS-CWDM4G1590 demonstrates resilience against signal dispersion with a penalty of 3 dB at 25 km, indicating its capability to maintain signal integrity over extended distances. Storage is also considered, with the device being able to withstand temperatures from -40 °C up to 85 °C, ensuring long-term durability. HTML Bullet Points: -
  • Wavelength: 1590 nm, ensuring compatibility with specific network standards.
  • -
  • Speed: Supports 1/2/4 Gbps, accommodating varying data transmission requirements.
  • -
  • Temperature Range: Operates between 0 °C to 70 °C, with storage temperatures ranging from -40 °C to 85 °C, ensuring reliability under diverse conditions.
  • The Cisco DS-CWDM4G1590 emerges as a critical component in the realm of computer networking, offering a blend of speed, reliability, and compatibility. Its specifications are tailored to meet the rigorous demands of modern data communication networks, making it an essential asset for enterprises seeking to enhance their networking capabilities.


    Item NumberCisco DS-CWDM4G1590
    Emission Wavelength1590 nm
    Interface TypeSFP
    Transmission MediumOptical Fiber
    Data Rate1/2/4 Gbps
    Housing ColorRed
    Laser Safety ClassClass I according to 21CFR1040
    Operational Temperature Range Low0 °C
    Operational Temperature Range High70 °C
    Storage Temperature Range Low-40 °C
    Storage Temperature Range High85 °C
    Lowest Side Mode Suppression Ratio≥30 dB
    Lowest Output Power of Transmitter1.0 dBm
    Highest Output Power of Transmitter5.0 dBm
    Lowest Output Power of Receiver-15.7 dBm
    Highest Output Power of Receiver0 dBm
    Optical Link Budget17.8 dB
    Minimum Extinction Ratio of Transmitter4 dB
    Dispersion Penalty after 25 km3 dB
    Physical ConnectorDual LC
    Physical Dimensions - Height8.46 mm
    Physical Dimensions - Width13.27 mm
    Physical Dimensions - Depth56.64 mm
    CompatibilityCompatible with Cisco MDS 9000 Series Director Switching Modules and Fabric Switch Ports

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