Skip to content


by Cisco
Product Line: Cisco DWDM-SFP-3977
Product Type: Transceiver
Original price $0.00 - Original price $2,329.00
Original price
$0.00 - $2,329.00
Current price $2,329.00
Title: Surplus

Orders typically ship within 1-3 Business days, if you need an item to ship sooner please contact us.

Product Description

The DWDM-SFP-3977 is a Cisco SFP+ plug-in module designed for high-speed networking, supporting a 1000BASE port type and operates on a 1539.77 nm wavelength with a 100 GHz frequency on the ITU Grid, channel 47. It is compatible with a range of Cisco products including the 29XX, 39XX, and 40 series, among others, and features a single mode SC/PC interface for connectivity. This module adheres to Laser Class 1, IEC 60825-1 standards, ensuring safety and reliability in various operating environments.

Key Feature for the DWDM-SFP-3977

  • What is the wavelength specification of the SFP+ module?
    The wavelength specification is 1539.77 nm.
  • How does the form factor of this device contribute to its usage?
    The SFP+ Plug-In form factor allows for easy installation and removal in compatible slots, enhancing system flexibility and scalability.
  • Which Cisco devices is this module designed for?
    Designed for Cisco 29XX, 39XX, 40XX; ASR 1002; Catalyst 3560, 3750, 49XX; Ethernet Services Plus Extended Transport 20, 40; Ethernet Services Plus Transport 20, 40, Extended Combination 20, 40; ME 3600X 24, 3800X 24; Nexus 7000; Supervisor Engine.
  • What safety standards does this module comply with?
    Compliant with Laser Class 1 and IEC 60825-1 standards, ensuring safe operation.
  • What are the operating temperature ranges for this SFP+ module?
    The module operates within a temperature range of 32°F to 122°F (0°C to 50°C).
  • Can you detail the connectivity technology and interface type used by this module?
    This module uses wired connectivity technology and has an interface of 1 x Ethernet 1000Base-DWDM - SC/PC single mode x 2.
  • What is the data link protocol supported by this module?
    Supports a 2 Gb Fibre Channel data link protocol.
  • What are the physical dimensions of this SFP+ module?
    Width: 0.5 in., Depth: 2.2 in., Height: 0.4 in., facilitating integration into networking hardware.
  • Which ITU channel does this module align with?
    Aligns with ITU Channel 47, utilizing a 100 GHz frequency grid.
  • What type of cabling is compatible with this module?
    Supports 1000Base-DWDM cabling for high-performance networking.

Product Review

The Cisco DWDM-SFP-3977 module offers a wavelength of 1539.77 nm and operates within the 100 GHz frequency on the ITU grid, channel 47, making it compatible with a range of Cisco devices including the 29XX and 39XX series, ASR 1002, Catalyst series, and more, ensuring wide applicability for network engineers. Its support for the 2 Gb Fibre Channel over a 1000Base-DWDM interface ensures efficient data link protocols for high-speed networking requirements. However, its reliance on SC/PC single-mode connectivity might limit its use in environments where multimode fiber is predominant, potentially requiring additional investments in compatible infrastructure.


The Cisco DWDM-SFP-3977 is a high-performance, small form factor pluggable (SFP+) transceiver designed for use in 1000BASE networks. This module is equipped with a single-mode fiber optic interface, operating at a wavelength of 1539.77 nm within the ITU 100 GHz grid, specifically on ITU Channel 47. It supports a data link protocol of 2 Gb Fibre Channel, making it suitable for high-speed data communications. With dimensions of 0.5 inches in width, 2.2 inches in depth, and 0.4 inches in height, the Cisco DWDM-SFP-3977 is compact and can be easily installed in compatible slots, requiring just one SFP (mini-GBIC) slot for connectivity. This module is designed to seamlessly integrate with a wide range of Cisco hardware, including but not limited to the Cisco 29XX, 39XX, 40XX series, ASR 1002, Catalyst 3560, 3750, 49XX series, Ethernet Services Plus Extended Transport 20, 40, Ethernet Services Plus Transport 20, 40, Extended Combination 20, Extended Combination 40, ME 3600X 24, 3800X 24, Nexus 7000, and Supervisor Engine. Key features of the Cisco DWDM-SFP-3977 include: -
  • Connectivity technology: Wired, ensuring reliable and secure data transmission.
  • Interfaces: 1 x Ethernet 1000Base-DWDM - SC/PC single mode x 2, providing a standard connection to network segments.
  • Compliant Standards: Laser Class 1, IEC 60825-1, ensuring safety and compatibility with international standards.
The operating temperature range of the module is from 32 degrees Fahrenheit to 122 degrees Fahrenheit, allowing for deployment in a variety of environments without compromising performance. The cabling type supported is 1000Base-DWDM, which is specifically designed for dense wavelength-division multiplexing applications, offering a high degree of scalability and bandwidth optimization. The Cisco DWDM-SFP-3977 is built to comply with Laser Class 1, IEC 60825-1 standards, ensuring that it meets rigorous safety regulations for laser products. Its design as a plug-in module facilitates easy installation and removal, providing flexibility in network management and maintenance. In summary, the Cisco DWDWDM-SFP-3977 transceiver module offers an efficient solution for extending the reach of gigabit Ethernet networks. Its compact size, compatibility with a wide range of Cisco equipment, and compliance with critical safety standards make it an ideal choice for network administrators looking to enhance their data communication infrastructure with high-speed, reliable connectivity.


Item Code Cisco DWDM-SFP-3977
Manufacturer Cisco
Module Type SFP+ Module
Optical Wavelength 1539.77 nm
Interface Standard 1000BASE
Channel Spacing 100 GHz
Channel Plan ITU Grid
ITU Channel Number 47
Communication Protocol 2 Gbps Fibre Channel
Physical Width 0.5 inches
Physical Depth 2.2 inches
Physical Height 0.4 inches
Compatibility Designed for various Cisco platforms including but not limited to Cisco 2900, 3900, 4000 series; ASR 1002; Catalyst 3560, 3750, 4900 series; various Ethernet Services modules; ME 3600X and 3800X series; Nexus 7000; Supervisor Engine models
Connection Type 1000Base-DWDM Cabling
Slot Requirement One SFP slot
Safety Standards Complies with Laser Class 1, IEC 60825-1
Connection Interface Wired
Module Build Insertable module
Connection Ports One 1000Base-DWDM port - SC/PC single mode
Highest Operating Temperature 122°F
Lowest Operating Temperature 32°F
Laser Wavelength 1539.77 nm

Compare products

{"one"=>"Select 2 or 3 items to compare", "other"=>"{{ count }} of 3 items selected"}

Select first item to compare

Select second item to compare

Select third item to compare