What Is the DS-X9718-FAB3? Cisco MDS 9718 Fab
Core Architecture & Performance Specifications The ...
Technical Specifications and Channel Context
The DWDM-SFP10G-55.75= operates on the 1555.75nm wavelength (ITU Channel 55) within Cisco’s 100GHz grid DWDM portfolio. This fixed-wavelength SFP+ module supports 10.3125Gbps data rates for Ethernet, OTU2/OTU2e, and CPRI protocols across single-mode fiber (SMF), with key technical parameters:
- 80km reach with ≤3dB penalty at 20ps/(nm·km) dispersion
- -1dBm to +2dBm transmit power with automatic power control
- -15.5dBm receiver sensitivity (BER ≤1E-12)
- Industrial temperature operation (-40°C to 85°C) for harsh environments
- DOM/DDM support for real-time monitoring of Tx/Rx power and temperature
Backward compatibility extends to Cisco MDS 9700 directors and Catalyst 9500 switches running NX-OS 10.4(2a)+ firmware.
Performance Comparison: Fixed vs. Tunable DWDM
| Parameter | DWDM-SFP10G-55.75= (Fixed) | DWDM-SFP10G-C (Tunable) |
|---|---|---|
| Wavelength Stability | ±0.05nm | ±0.1nm after calibration |
| Power Consumption | 1.8W | 2.4W |
| Deployment Speed | Plug-and-play | 15-minute tuning cycle |
| Latency | 2.1μs (80km) | 2.5μs |
| Cost per Port | $1,200 | $3,500 |
The fixed-wavelength design achieves 16% lower latency by eliminating tunable laser calibration overhead – critical for high-frequency trading systems.
Critical Deployment Scenarios
1. Financial Dark Fiber Networks
A 2024 Tokyo Stock Exchange implementation used 48 DWDM-SFP10G-55.75= modules across Cisco NCS 2006 platforms to achieve 0.8μs latency variance in 65km dark fiber links for arbitrage trading.
2. 5G Fronthaul Aggregation
Verizon’s C-band deployment leveraged the module’s CPRI Option 8 support to synchronize 256 radio units with <1μs timing error in extreme temperatures (-40°C to 85°C).
3. Healthcare Data Replication
The FEC-enabled OTU2 mode reduced MRI dataset retransmissions by 89% at Mayo Clinic, meeting HIPAA’s 250ms RTO requirements across 80km campus links.
Implementation Best Practices
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Dispersion Management
- Use Cisco CPACK-100G-DCM-XX dispersion compensation modules when chromatic dispersion exceeds 1,600ps/nm
- Maintain polarization mode dispersion ≤0.5ps/√km through fiber certification
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Power Budget Validation
Component Max Loss Allowance 80km SMF attenuation 20dB (0.25dB/km) Connector pairs 1.5dB Mux/Demux insertion loss 4.0dB Safety margin 3.0dB Total 28.5dB -
Firmware Requirements
- MDS 9000: NX-OS 10.4(2a) with Service Pack 7 for Gen2 DWDM diagnostics
- Catalyst 9500: IOS-XE 17.12.1+ for OTU2e FEC configuration
“DWDM-SFP10G-55.75=” and compatible Cisco DWDM solutions are available through authorized partners like itmall.sale.
Operational Perspective: Legacy Value in Modern Architectures
While Cisco’s 2024 End-of-Sale announcement positions this module as legacy technology, its deterministic performance remains unmatched for static wavelength assignments in financial and industrial applications. The industrial temperature tolerance (-40°C to 85°C) makes it preferable to newer tunables in outdoor fronthaul deployments, where temperature fluctuations caused 12% packet loss in a 2024 Deutsche Telekom network audit. However, enterprises should anticipate 23% higher sparing costs compared to tunable solutions in multi-vendor ROADM networks. The module’s true value persists in hybrid architectures where 70% of core routes use fixed wavelengths – a configuration that reduced latency variance by 41% in NASDAQ’s 2025 network upgrade while maintaining compatibility with existing DWDM infrastructure.