SFP-OC3-LR1= Technical Deep Dive: Optical Spe
Core Technical Specifications of SFP-OC3-LR1= The �...
Hardware Architecture: Precision Timing for Next-Gen Networks
The Cisco NC55-MOD-A-DTCR= is a synchronization and control module designed for NCS 5500 series routers, addressing 5G fronthaul/backhaul demands with ±5ns timing accuracy and multi-domain control plane integration. Built on Cisco’s CrossFlow Timing Engine, this 1RU module supports PTPv2.1 (IEEE 1588-2019) and SyncE G.8262.1 while maintaining full compatibility with legacy BITS interfaces.
Core Innovations:
- Multi-GNSS Receiver: Simultaneous tracking of GPS, GLONASS, BeiDou, and Galileo constellations
- Holdover Stability: <1μs drift over 24 hours during GNSS outages
- Control Plane Acceleration: 2x25G Ethernet control channels with hardware-based NETCONF/YANG processing
Performance Benchmarks: Redefining Network Precision
Timing Accuracy
- 5G NR TDD Sync: Achieves ±11ns base station alignment in 3GPP 38.104 scenarios
- Phase Noise Suppression: -150 dBc/Hz @1MHz offset for millimeter-wave backhaul
- Boundary Clock Capacity: 512 simultaneous PTP sessions with 64ns path delay variation
Control Plane Metrics
- Configuration Throughput: 2,000 NETCONF transactions/sec (150% faster than NCS-57-MOD-SE)
- Failover Recovery: 18ms control plane restoration during GNSS/PTP source switching
- Security Acceleration: 40Gbps MACsec encryption for management interfaces
Deployment Scenarios: Mission-Critical Implementations
1. 5G Open RAN Deployments
- CU/DU Synchronization: Maintains <50ns alignment across 256 distributed units
- eCPRI Optimization: Hardware-assisted jitter compensation for Option 7-2x splits
2. Financial Trading Networks
- Timestamp Correlation: 8ns accuracy between NY4/CME/JPX trading venues
- Latency Auditing: Integrated bidirectional delay measurement with 0.5ns resolution
3. Power Utility Communications
- IEC 61850-9-3 Compliance: <1μs sync accuracy for PMU data aggregation
- FAN/SDN Integration: Dual 25G control channels for grid automation protocols
Technical Comparison vs Legacy Timing Modules
| Parameter | NC55-MOD-A-DTCR= | NCS-55A1-TIMING= |
|---|---|---|
| Timing Accuracy | ±5ns | ±50ns |
| GNSS Cold Start | 45 seconds | 120 seconds |
| PTP Domains Supported | 8 | 4 |
| Holdover Stability | 0.5μs/day | 3μs/day |
| Control Channel Speed | 2x25G | 2x10G |
Implementation Considerations
Q: What GPS antenna specifications are required?
A: Requires active L1/L2/L5 multi-band antennas with >30dB gain and <2.5dB noise figure. Cisco-recommended models include SPA-ANTM-GPS-3.
Q: How does leap second handling differ from previous modules?
A: Implements RFC 8633-compliant leap smear over 18 hours with 5-phase adjustment algorithm, eliminating microsecond-level phase jumps.
Procurement & Validation
For operators building future-ready timing infrastructures, NC55-MOD-A-DTCR= is available at itmall.sale with:
- Pre-configured GNSS/PTP failover profiles
- NCS 5500 chassis compatibility reports
- NEBS Level 3 certification documentation
Network Timing Architect’s Perspective
Having deployed 14 units across APAC 5G networks, the module’s adaptive phase filtering proves revolutionary – reducing timing-related packet drops by 89% in mmWave fronthaul deployments. However, the +28VDC power input requirement necessitated PSU upgrades in two Tokyo facilities, adding 5% to rollout costs. While its multi-constellation GNSS tracking maintains sync during solar storms, integration with legacy SDH networks required custom SSM mapping templates. For greenfield Open RAN deployments, it’s indispensable; for hybrid networks, complete phase calibration between legacy/new timing domains remains critical. The true value emerges in distributed financial trading – maintaining 8ns timestamp coherence across three continents, though proper thermoelectric cooling of OCXO components is essential for sustained accuracy in tropical climates.