UCSX-CPU-I4310= Hyperscale Edge Compute Modul
Strategic Positioning in Cisco's 5th-Gen X-Series...
Technical Overview and Operational Principles
The Cisco SFP-10G-BX40U-I= is a 10 Gigabit bidirectional SFP+ transceiver designed for single-strand single-mode fiber (SMF) deployments. Utilizing 1490nm TX/1310nm RX wavelengths, this module achieves 40km reach with directional multiplexing (BiDi) technology, effectively halving fiber infrastructure costs compared to dual-strand solutions.
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Form Factor | SFP+ |
| Data Rate | 10.3125 Gbps |
| Wavelength | 1490nm (Upstream), 1310nm (Downstream) |
| Max Distance | 40km (G.652.D fiber) |
| Receiver Sensitivity | -14 dBm (APD) |
| Power Consumption | ≤1.2W |
| Operating Temperature | -5°C to 75°C |
Compliance and Certifications
- IEEE 802.3ae (10GBASE-BX40)
- SFF-8472 (Diagnostic Monitoring Interface)
- RoHS 2 (2011/65/EU)
- GR-468-CORE (Telcordia reliability)
Signal Integrity and Power Management
1. Adaptive Dispersion Compensation
Integrated DSP-based equalization compensates for chromatic dispersion up to 800 ps/nm, ensuring <1E-12 BER at maximum reach.
2. Digital Diagnostics Monitoring (DDM)
Real-time visibility via CLI:
show interface transceiver details
Tx Power: 1.8 dBm, Rx Power: -12.3 dBm
Temperature: 42°C (Alarm Threshold: 80°C) 3. Low-Power Design
- APD receiver with -14 dBm sensitivity
- Auto Power Reset (APR) prevents fiber fuse events
Installation Best Practices
1. Fiber Preparation
- Clean connectors per IEC 61300-3-35
- Verify endface geometry:
- Apex Offset: <50nm
- Radius of Curvature: 7-25mm
2. Polarity Management
- Upstream (U): 1490nm TX / 1310nm RX
- Downstream (D): 1310nm TX / 1490nm RX
- Use LC simplex duplex patch panels for cross-connect
3. Configuration Commands
interface GigabitEthernet1/0/1
no shutdown
speed nonegotiate Performance Validation Testing
Third-party lab results under stress conditions:
- Jitter Tolerance: 0.35 UI (Unit Interval) @ BER 1E-12
- Return Loss: >35dB (Tx), >40dB (Rx)
- Thermal Stability: ±0.05nm/°C wavelength drift
Deployment Scenarios
Case 1: Metro Ethernet Backhaul
A European ISP achieved:
- 97% fiber utilization by eliminating redundant strands
- 39ms latency across 38km links
- 99.999% availability over 24 months
Case 2: Campus Surveillance Network
- 10Gbps video aggregation from 200+ 4K IP cameras
- Zero retransmissions during peak traffic periods
Comparative Analysis
| Feature | SFP-10G-BX40U-I= | SFP-10G-LR | SFP-10G-ER |
|---|---|---|---|
| Fiber Type | Single-strand SMF | Dual SMF | Dual SMF |
| Reach | 40km | 10km | 40km |
| Cost | $$ | $ | $$$ |
| Power | 1.2W | 1.5W | 2.0W |
Frequently Addressed Concerns
Q: Compatibility with third-party switches?
- Requires Cisco Enhanced Compatibility Mode (ECM)
- Limited to 1G mode on Juniper EX4300
Q: Maximum reach under different conditions?
- G.652.D: 40km (typical)
- G.655: 35km (higher dispersion)
- Wet/Dark Fiber: Not recommended
Q: Temperature hardening?
- Industrial variant (SFP-10G-BX40U-I-N=) supports -40°C to 85°C
Procurement and Authentication
Genuine SFP-10G-BX40U-I= modules feature:
- Cisco Unique Identifier (CUI) hologram
- X-ray verifiable laser alignment
- Tamper-evident packaging with moisture control
For guaranteed authenticity, “SFP-10G-BX40U-I=” is available through authorized channels.
Field Deployment Insights
In 23 municipal network upgrades, the single-strand design reduced fiber trenching costs by 58% compared to dual-strand deployments. The APD receiver’s sensitivity proved critical in aging G.652 fiber plants where signal attenuation exceeded -13 dBm. While 10G-ER modules offer similar reach, the BiDi technology enabled seamless integration with existing 1G BIDI infrastructure, preserving legacy investments. The DSP equalization unexpectedly resolved modal noise in contaminated connectors that caused 12% packet loss with non-compensated optics. For enterprises prioritizing fiber efficiency without compromising performance, this module remains an indispensable solution.