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by Cisco
Product Line: Cisco NCS 2000 Series
Product Type: Single Module ROADM Line Card
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Title: Surplus

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Product Description

The NCS2K-20-SMRFS is a Cisco networking module featuring 20 ports with a Spectrum Switchable Gain Flex and supports 97 channels on an ITU channel grid. It operates within a 191.3 GHz to 196.1 GHz wavelength range, offering a flex spectrum slice width of 12.5 GHz and up to 388 slices, with channel bandwidths ranging from 25 GHz to 4850 GHz. The module ensures optical port isolation between 28 dB and 25 dB, a minimum insertion loss of 6 dB, and operates efficiently within a -5 °C to 55 °C temperature range and a 5% to 95% relative humidity range, drawing a typical power of 60 W and a maximum of 84 W.

FAQs for the NCS2K-20-SMRFS

  • What is the total number of ports available on the Spectrum Switchable Gain Flex?
    The device has 20 ports.
  • How many channels does the Spectrum Switchable Gain Flex support?
    It supports 97 channels.
  • What is the channel grid standard for the Spectrum Switchable Gain Flex?
    The channel grid follows the ITU standard.
  • What is the center wavelength for Channel 0 and Channel 1?
    Channel 0's center wavelength is 191.3 GHz and Channel 1's is 191.35 GHz.
  • What is the maximum settable channel bandwidth for the Spectrum Switchable Gain Flex?
    The maximum bandwidth is 4850 GHz, equivalent to 388 slices.
  • What are the optical port isolation values for the Spectrum Switchable Gain Flex?
    At 0 to 15 dB attenuation, isolation is 28 dB, and at 15 to 25 dB attenuation, it is 25 dB.
  • What is the minimum insertion loss for the Spectrum Switchable Gain Flex?
    The minimum insertion loss is 6 dB.
  • What is the typical power consumption of the Spectrum Switchable Gain Flex?
    The typical power consumption is 60 W.
  • How many slots does the Spectrum Switchable Gain Flex have?
    It has 1 slot.
  • What are the operating temperature ranges for the Spectrum Switchable Gain Flex?
    The operating temperature ranges from -5 °C to 55 °C.

Product Review

The CISCO NCS2K-20-SMRFS offers a wide range of flexibility with its support for 97 channels and a spectrum slice width of 12.5 GHz, allowing for efficient bandwidth allocation. However, its minimum insertion loss of 6 dB and maximum polarization dependent loss of 0.5 dB may impact performance in scenarios requiring optimal signal integrity. Additionally, the device's power consumption, with typical usage at 60 W and a maximum of 84 W, could be a concern for operations prioritizing energy efficiency.


The CISCO NCS2K-20-SMRFS is a network hardware component designed for advanced optical networking, offering a versatile platform for spectrum management and optical signal routing. This device is engineered to support a wide range of networking applications, from simple point-to-point layouts to complex mesh networks, thanks to its comprehensive hardware specifications and functionality. At its core, the NCS2K-20-SMRFS features 20 ports, providing ample connectivity options for various network configurations. It utilizes a Spectrum Switchable Gain Flex, allowing for dynamic adaptation to network demands, enhancing efficiency and performance. The device supports up to 97 channels on the ITU channel grid, with the first channel starting at a center wavelength of 191.3 GHz and the last channel (Channel 96) at 196.1 GHz, covering a broad spectrum range for diverse networking requirements.
  • Channel 0 Center Wavelength: 191.3 GHz
  • Channel 96 Center Wavelength: 196.1 GHz
  • Total Number of Slices: 388
The flex spectrum feature of this hardware is particularly notable, offering a slice width of 12.5 GHz and enabling up to 388 slices. This flexibility allows for a minimum settable channel bandwidth of 25 GHz (equivalent to 2 slices) and can be extended up to a maximum of 4850 GHz (388 slices), catering to various bandwidth needs across different network scenarios. Optical port isolation is another key specification, with 28 dB isolation for 0 to 15 dB attenuation and 25 dB for 15 to 25 dB attenuation, ensuring signal integrity and reducing interference. The NCS2K-20-SMRFS is designed with efficiency in mind, featuring a minimum insertion loss of 6 dB and a Variable Optical Attenuator (VOA) dynamic range of 15 dB, operational for precise attenuation control. The VOA attenuation setting accuracy is within +/-0.5 dB for 0 to 15 dB attenuation and +/-1 dB for 15 to 25 dB attenuation, ensuring precise signal management. Each channel can handle a maximum input power of 15 dB, with a maximum polarization dependent loss of 0.5 dB, maintaining signal quality and consistency. From a power perspective, the device operates typically at 60 W, with a maximum power consumption of 84 W, and is designed to fit into a single slot for efficient space utilization. The card LEDs provide visual indications of operational status, including failure (FAIL), active/standby (ACT/STBY), and signal fail (SF), facilitating easy monitoring and maintenance. The operational environment specifications indicate a minimum normal operating temperature of -5 °C and a maximum of 55 °C. It can function within a relative humidity range of 5% to 95%, ensuring reliable performance across various environmental conditions. In summary, the CISCO NCS2K-20-SMRFS is an advanced optical networking device that combines flexibility, efficiency, and high performance, making it suitable for a wide range of networking applications. Its comprehensive hardware specifications and capabilities ensure it can meet the demands of modern optical networks, providing scalable, reliable solutions for complex networking challenges.


Port Count20
Gain ControlSpectrum Switchable Gain Flex
Channel Total97
Channel OrganizationITU
Initial Channel Frequency191.3 GHz
Second Channel Frequency191.35 GHz
Last Channel Frequency196.1 GHz
Spectrum Segment Width12.5 GHz
Slice Count388
Smallest Channel Width25 GHz (2 Slices)
Largest Channel Width4850 GHz (388 Slices)
Isolation at Optical Ports28 dB (0 to 15 dB Attenuation), 25 dB (15 to 25 dB Attenuation)
Lowest Insertion Loss6 dB
VOA Range15 dB (Operative)
Accuracy of VOA Attenuation+/-0.5 dB (0 to 15 dB Attenuation), +/-1 dB (15 to 25 dB Attenuation)
Peak Input Power per Channel15 dB
Max Polarization Loss0.5 dB
Standard Power Requirement60 W
Peak Power Requirement84 W
Slot Requirement1
Indicator LEDsFailure (FAIL), Active/Standby (ACT/STBY), Signal Fail (SF)
Optimal Operating Temperature Low-5 °C
Optimal Operating Temperature High55 °C
Operating Humidity Range Low5%
Operating Humidity Range High95%

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