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by Cisco
Product Line: Cisco Cisco ONS 15200 Series
Product Type: Dispersion Compensation Unit
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Title: Surplus

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Product Description

The 15216-DCU-550 offers a dispersion compensation level of 550 ps/nm, operating within a wavelength range of 1525-1565 nm and a reference wavelength of 1545.32 nm. It features a maximum insertion loss (IL) of 3.9 dB, polarization mode dispersion (PMD) of less than 1 ps, and polarization dependent loss (PDL) of less than 0.1 dB, ensuring minimal signal degradation. Designed for versatility, it supports a maximum optical return loss (ORL) of over 45 dB, can withstand temperatures from -5°C to 55°C, and fits in both 19- and 23-inch racks, with dimensions of 1.62 in. (41mm) H x 8.20 in. (208 mm) W x 9.78 in. (248 mm) D and a weight range of 4.4 lb (2 kg) to 7.7 lb (3.5 kg).

FAQs for the 15216-DCU-550

  • What is the compensation level of this device?
    The compensation level is 550 (ps/nm).
  • How does the maximum insertion loss (IL) relate to the product's efficiency?
    A maximum IL of 3.9 dB indicates the amount of signal loss during transmission, affecting the product's efficiency.
  • What is the maximum Polarization Mode Dispersion (PMD) supported?
    The maximum PMD supported is less than 1 ps.
  • Can you detail the Polarization Dependent Loss (PDL) specification?
    The maximum PDL is less than 0.1 dB, ensuring minimal signal loss variation due to polarization.
  • What is the significance of the Optical Return Loss (ORL) specification?
    An ORL greater than 45 dB indicates strong signal reflection resistance, critical for maintaining signal integrity.
  • What are the temperature limits for the device's operation?
    The device operates within a temperature range of -5°C to 55°C.
  • How long can the device transmit without signal quality degradation?
    It can transmit up to 5.24 km without significant signal quality degradation.
  • What is the device's wavelength range?
    The wavelength range is 1525-1565 nm, suitable for various optical communication applications.
  • What are the humidity tolerances for this device?
    The device can operate in relative humidity ranges from 5% minimum to 95% maximum, noncondensing.
  • What connector type is used with this device?
    The device uses an LC-UPC connector type, ensuring compatibility with standard optical fiber connections.

Product Review

The CISCO 15216-DCU-550 offers a commendable dispersion compensation level of 550 ps/nm within the C-band (1525-1565 nm), making it suitable for long-distance optical networking with a maximum length reach of 5.24 km. However, its insertion loss is relatively high at 3.9 dB, potentially impacting signal strength over extensive networks. Additionally, the device's environmental durability is notable, operating efficiently between -5°C and 55°C with up to 95% non-condensing humidity, ensuring reliable performance across various climatic conditions.


The CISCO 15216-DCU-550 is a specialized piece of networking hardware designed for precision and efficiency in managing optical signals across networks. This device is engineered to provide compensation for dispersion with a level of 550 ps/nm, making it suitable for a wide range of applications in telecommunications and data center environments. The hardware is particularly noted for its ability to maintain signal integrity over distances up to 5.24 kilometers, with a reference wavelength of 1545.32 nm and a wavelength range from 1525 to 1565 nm. Key specifications highlight the device's performance in challenging conditions. It boasts a maximum insertion loss (IL) of 3.9 dB, ensuring minimal signal attenuation during operation. The hardware further demonstrates resilience against signal degradation with a maximum polarization mode dispersion (PMD) of less than 1 ps and a maximum polarization dependent loss (PDL) of less than 0.1 dB. Optical return loss (ORL) is another critical factor in maintaining signal quality, and the CISCO 15216-DCU-550 excels with an ORL greater than 45 dB. Environmental adaptability is a crucial consideration for networking hardware, and this device is designed to operate within a broad temperature range from -5°C to 55°C. It also functions reliably under varying humidity conditions, from a minimum of 5% to a maximum of 95%, noncondensing. These features ensure consistent performance across different climates and operational settings. The hardware's dispersion value and insertion loss variance remain stable over temperature, with a variance of +/-3% and less than 0.6 dB respectively, showcasing its reliability over a wide range of environmental conditions. Physically, the CISCO 15216-DCU-550 is designed for compatibility and ease of installation within various infrastructures. It measures 1.62 inches in height, 8.20 inches in width, and 9.78 inches in depth, with a weight that ranges from a minimum of 4.4 lb to a maximum of 7.7 lb. This compact and lightweight design is suitable for 1 rack unit (1RU) spaces, and it can be installed in either 19- or 23-inch racks or bays, providing flexibility for different rack configurations. Connectivity is facilitated through LC-UPC connectors, which are widely used in the industry for their reliability and ease of use. This choice of connector ensures that the device can be easily integrated into existing infrastructures without the need for additional adapters or modifications.
  • Compensation Level: 550 ps/nm for broad application suitability.
  • Maximum Insertion Loss: 3.9 dB to minimize signal attenuation.
  • Connector Type: LC-UPC for straightforward integration into network setups.
In summary, the CISCO 15216-DCU-550 is a versatile and reliable solution for dispersion compensation in optical networks. Its specifications demonstrate a balance between performance in signal integrity and adaptability to environmental conditions, making it a valuable asset for maintaining high-quality communication links in various networking scenarios.


Item NumberCISCO 15216-DCU-550
Dispersion Compensation550 (ps/nm)
Highest Insertion Loss3.9 dB
Peak Polarization Mode Dispersion< 1 ps
Highest Polarization Dependent Loss< 0.1 dB
Optimal Optical Return Loss> 45 dB
Maximum Distance5.24 km
Nominal Wavelength1545.32 nm
Dispersion Slope Ratio0.0037 nm
Operable Wavelength Span1525-1565 nm
Lowest Operating Temperature-5°C
Highest Operating Temperature55°C
Minimum Humidity Level5%, noncondensing
Maximum Humidity Level95%, noncondensing
Dispersion Stability Across Temperature+/-3%
Variability in Insertion Loss with Temperature< 0.6 dB
Connection InterfaceLC-UPC
Product Height1.62 in. (41mm)
Product Width8.20 in. (208mm)
Product Depth9.78 in. (248mm)
Weight Range Minimum4.4 lb (2 kg)
Weight Range Maximum7.7 lb (3.5 kg)
Unit Height1 rack unit (1RU)
Compatibility19- or 23-inch rack or bay

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