Cisco DWDM-SFP10G-56.55
10GBASE-DWDM 1556.55 nm SFP10G (100-GHz ITU grid), Original Cisco
Product Highlights
Scaling metro and long-haul optical networks demands transceivers that deliver rock-solid 10-Gigabit performance on tightly spaced DWDM wavelength channels — without compromising reach or reliability. The Cisco DWDM-SFP10G-56.55 is an original Cisco 10GBASE-DWDM SFP+ transceiver module operating at a fixed wavelength of 1556.55 nm (ITU Channel 26) on the 100-GHz ITU grid.
Designed for deployment in DWDM networking equipment across metropolitan access and core networks, this SFP+ module supports data rates from 9.9 Gbps to 11.1 Gbps, accommodating 10G Ethernet (LAN/WAN) and OTN (OTU2/OTU2e) applications. It connects via a duplex LC connector over single-mode fiber (SMF) and includes Digital Optical Monitoring (DOM) for real-time visibility into transmit power, receive power, temperature, and other critical parameters.
As a genuine Cisco transceiver, the DWDM-SFP10G-56.55 is supported across a broad range of Cisco switches, routers, and optical transport platforms. Its hot-swappable SFP+ form factor and compliance with SFF-8431 and SFF-8432 MSA standards make it a straightforward drop-in upgrade for any DWDM channel plan requiring the C26 wavelength. Whether you are building out a new DWDM ring or adding capacity to an existing metro network, this module delivers the wavelength precision and signal integrity that dense optical networks require.
Features & Benefits
10G Multi-Rate DWDM Connectivity
The DWDM-SFP10G-56.55 supports data rates from 9.9G to 11.1G, covering 10GE LAN, 10GE WAN, and OTU2/OTU2e transport. This multi-rate flexibility lets you deploy a single optic across Ethernet and OTN applications, simplifying sparing and reducing inventory costs.
100-GHz ITU Grid Precision
Operating at a fixed 1556.55 nm wavelength on ITU Channel 26, this transceiver is engineered for tight 100-GHz channel spacing. Precise wavelength stability ensures minimal crosstalk in dense multiplexing environments, enabling you to maximize fiber capacity with confidence.
Digital Optical Monitoring (DOM)
Built-in DOM functionality, accessible via a 2-wire serial interface per SFF-8472, provides real-time telemetry on transmit power, receive power, bias current, temperature, and supply voltage. This proactive monitoring capability helps network teams identify degradation before it impacts service.
Hot-Swappable SFP+ Form Factor
The compact, hot-swappable SFP+ design allows field installation and replacement without powering down the host device. This minimizes maintenance windows and supports high-availability network architectures where uptime is critical.
MSA Standards Compliance
Full compliance with SFF-8431 and SFF-8432 Multi-Source Agreement standards ensures mechanical and electrical interoperability with a wide range of SFP+ host ports. As an original Cisco optic, it is validated for use across supported Cisco platforms without compatibility concerns.
Deployment Scenarios
Metropolitan DWDM Ring Expansion
Deploy the DWDM-SFP10G-56.55 in metro DWDM rings to add 10G channels over existing fiber infrastructure. Its fixed C26 wavelength integrates directly with 100-GHz DWDM mux/demux equipment, enabling capacity growth without laying new fiber.
Data Center Interconnect (DCI)
Connect geographically separated data centers over DWDM transport with 10G Ethernet links. The module's multi-rate support and DOM telemetry provide the performance visibility needed for mission-critical inter-site replication and disaster recovery traffic.
Service Provider Core & Aggregation
Service providers can leverage this transceiver in ASR, NCS, and Nexus platforms to deliver 10G wavelength services to enterprise customers. The 100-GHz grid alignment supports dense channel plans that maximize revenue per fiber pair.
OTN Transport Networks
With support for OTU2 and OTU2e data rates, this module is well-suited for optical transport network deployments where standards-based OTN framing, monitoring, and forward error correction are required.
General
Optical Characteristics
Performance
Power
Environmental
Compliance
Compatibility Notes
The Cisco DWDM SFP+ modules are supported across a variety of Cisco switches, routers, and optical transport devices. Always verify compatibility for your specific platform and IOS/NX-OS/IOS-XR version using the Cisco Transceiver Module Group (TMG) Compatibility Matrix at tmgmatrix.cisco.com. This transceiver requires a host port with SFP+ slot support and, for the fixed-wavelength (non-tunable) DWDM-SFP10G series, a linear electrical interface with EDC (Electronic Dispersion Compensation) PHY on the host board.
Downloads & Resources
Frequently Asked Questions
| Part Number | Product | Key Difference |
|---|---|---|
| DWDM-SFP10G-55.75 | Cisco 10GBASE-DWDM SFP+ 1555.75nm (C27) | Adjacent ITU channel (C27) at 1555.75 nm — same family, different wavelength for multi-channel DWDM deployments. |
| DWDM-SFP10G-57.36 | Cisco 10GBASE-DWDM SFP+ 1557.36nm (C25) | Adjacent ITU channel (C25) at 1557.36 nm — use alongside C26 to build out additional DWDM channels. |
| DWDM-SFP10G-C | Cisco 10G DWDM Tunable SFP+ (96-ch, 50-GHz) | Tunable across 96 ITU 50-GHz channels with 80 km reach — reduces sparing inventory but requires EDC PHY on host board. |
| DWDM-SFP10G-C-S | Cisco 10G DWDM Tunable SFP+ S-Class | Tunable S-Class with limiting interface (no EDC required) — plugs into any SFP+ port, 70 km reach, Ethernet only. |