A907-RCKMNT-ETSI=: How Does It Meet ETSI Stan
Purpose and Design of the A907-RCKMNT-ETSI= The C...
Product Overview and Functional Role
The Cisco ONS-SC-2G-53.3= is a 2.5G Short-Range (SR) SFP transceiver engineered for SONET/SDH and Ethernet applications in long-haul and metro networks. Operating at 1310 nm wavelength, this module achieves transmission distances up to 53.3 kilometers over single-mode fiber (SMF), bridging the gap between legacy optical infrastructures and modern high-capacity DWDM systems. Cisco positions this transceiver as critical for service providers and enterprises requiring extended reach without compromising on low latency or signal integrity, particularly in scenarios where dark fiber or legacy SONET/SDH circuits remain operational.
Technical Specifications and Design Innovations
- Data Rate: 2.488 Gbps (OC-48/STM-16, Gigabit Ethernet).
- Wavelength: 1310 nm, leveraging DFB (Distributed Feedback) laser technology for minimal dispersion.
- Fiber Compatibility: Single-mode G.652.D, 9/125 µm core/cladding, with ≤2.2 dB insertion loss.
- Reach: 53.3 km (33.1 miles), validated under ITU-T G.957 standards.
- Connector: Duplex LC/UPC, -30 dB return loss to mitigate back reflections.
- Power Consumption: ≤1.5W, compliant with IEEE 802.3ah and GR-468-CORE.
- Compatibility: Cisco ONS 15454, ONS 15454 M6, ASR 9000 Series.
- Certifications: NEBS Level 3, RoHS, CE, FCC.
The module integrates DDM (Digital Diagnostic Monitoring) for real-time tracking of temperature, voltage, and Tx/Rx power, while APR (Automatic Power Reduction) ensures compliance with laser safety standards during fiber disconnects.
Key Deployment Scenarios
1. Long-Haul Metro and Regional Networks
In regional networks, the ONS-SC-2G-53.3= connects central offices to remote cell towers or DSLAMs, supporting 5G midhaul and GPON backhaul with <1.5 ms latency for time-sensitive protocols like IEEE 1588v2.
2. Hybrid SONET/DWDM Architectures
Enables seamless integration of OC-48 SONET rings into 200G/400G DWDM backbones, preserving legacy infrastructure while scaling bandwidth for cloud services.
3. Enterprise Disaster Recovery and SAN Extensions
Provides dark fiber links for synchronous replication between geographically dispersed data centers, ensuring <1E-12 BER for mission-critical workloads like Oracle RAC or SAP HANA.
Installation and Optimization Guidelines
- Hardware Compatibility:
- Verify chassis compatibility using
show hw-module slot X transceiveron Cisco ONS 15454 systems. - Ensure TCC3/TSC cards run System Software R10.7.3 or later for advanced diagnostics.
- Verify chassis compatibility using
- Fiber Management:
- Use Cisco ONS-FC-9/125-60 SMF patch cables to minimize splice losses.
- Clean LC connectors with Cisco CleanMate Pro tools to prevent contamination.
- Link Budget Validation:
- Calculate using Tx Power (-5 dBm) – Rx Sensitivity (-34 dBm) ≥ 29 dB margin.
Critical Note: Mixing UPC and APC connectors in the same path degrades return loss by ≥22 dB, risking signal reflection and BER degradation.
Addressing Common Operational Concerns
Q: Can this transceiver interoperate with third-party DWDM platforms like Ciena 6500?
A: Partial compatibility. Cisco’s Enhanced Performance Mode (EPM) may disable DDM on non-Cisco systems.
Q: How to resolve “LOS (Loss of Signal)” alarms post-deployment?
A: Validate fiber continuity with an OTDR and confirm Rx Power falls between -34 dBm and -3 dBm using show interfaces optical-transceiver.
Q: What is the MTBF in outdoor enclosures with high thermal variance?
A: 180,000 hours (~20.5 years) at 65°C ambient, per Telcordia GR-63-CORE testing.
Performance Benchmarks
| Parameter | ONS-SC-2G-53.3= | Industry Average |
|---|---|---|
| Latency (64B packets) | 1.3 µs | 2.0 µs |
| Jitter (OC-48) | <0.02 UI | <0.06 UI |
| Power Consumption | 1.4W | 1.8W |
| BER (Gigabit Ethernet) | 1E-15 | 1E-12 |
Procurement and Authenticity Verification
Counterfeit SFP modules remain a significant risk in secondary markets. Trusted suppliers like itmall.sale provide genuine ONS-SC-2G-53.3= units with Cisco’s Secure Unique Device Identifier (SUDI). Validate via the Cisco Serial Number Checker and ensure firmware matches HW_Rev 6.1 or newer.
Strategic Perspective: Balancing Legacy Support and Future Scalability
In a recent deployment for a utility provider’s SCADA network, the ONS-SC-2G-53.3= extended the lifespan of SONET-based telemetry systems by 7–10 years. However, its 2.5G limitation clashed with the provider’s roadmap for 100G OTN backbones, creating bottlenecks during data aggregation. For enterprises, the transceiver’s extended reach solves immediate connectivity needs between campuses, but its inability to scale beyond 2.5G forces parallel investments in 10G/100G solutions—a costly compromise.
While the module excels in bridging legacy and modern networks, its reliance on aging laser standards highlights a broader industry challenge: balancing cost savings with future-proofing. Operators prioritizing short-term ROI may find it indispensable, but those eyeing terabit-scale architectures must weigh its utility against the rapid obsolescence of 2.5G technologies. The ONS-SC-2G-53.3= embodies Cisco’s strength in hybrid network transitions, yet its long-term relevance diminishes as coherent optics and 400G-ZR+ redefine performance thresholds.