Cisco XR-NCS4K-6533K9= 800G Coherent Line Car
Core Hardware Architecture and Design Philosophy�...
Defining the A9KV2-DC-CBL-E=
The A9KV2-DC-CBL-E= is a direct current (DC) power cable specifically engineered for Cisco’s ASR 9000 Series routers and compatible DC power shelves. Designed for high-availability environments like telecom central offices or data centers, this cable ensures stable power delivery to critical routing infrastructure. Unlike generic DC cables, it is pre-terminated and tested to meet Cisco’s voltage drop and safety thresholds under maximum load conditions.
Key Technical Specifications
- Voltage Range: Supports -48V to -60V DC input, compliant with ETSI EN 300 132-2 standards for telecom power systems.
- Current Rating: 80A continuous load capacity, enabling compatibility with Cisco’s A9K-PWR3K-DC and A9K-PWR4K-DC power shelves.
- Connectors: Dual Anderson SBS 75 connectors with corrosion-resistant gold plating for low-resistance contact.
- Cable Gauge: 6 AWG copper conductors with XLPO insulation, rated for operation in -40°C to 75°C environments.
- Safety: Certified for UL 62 and IEC 60228 compliance, ensuring fire resistance and mechanical durability.
A9KV2-DC-CBL-E= vs. Generic DC Cables: Critical Differences
| Feature | A9KV2-DC-CBL-E= | Generic DC Cable |
|---|---|---|
| Voltage Drop | <1% at full load | 3-5% (risks under-voltage) |
| Connector Fit | Precision-molded for Cisco | Universal but loose |
| Fire Resistance | UL 94 V-0 | UL 94 HB (lower rating) |
| Warranty | Cisco 1-year replacement | None |
This cable minimizes power instability risks in ASR 9000 systems, which can trigger router reboots or packet loss during surges.
Addressing Common Deployment Concerns
Is the A9KV2-DC-CBL-E= backward-compatible with older ASR 9000 power shelves?
Yes, but only with DC-input shelves (e.g., A9K-PWR1K-DC). AC power systems require separate cabling.
What’s the maximum recommended cable length?
Optimal performance is guaranteed up to 3 meters. Beyond this, voltage drop may exceed Cisco’s thresholds unless using thicker gauges.
Can it be used outdoors or in harsh environments?
The IP67-rated connectors and UV-resistant insulation make it suitable for outdoor cabinet installations, but direct burial requires additional conduit.
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Practical Perspective
While third-party cables might seem cost-effective, the A9KV2-DC-CBL-E= is non-negotiable for networks prioritizing five-nines uptime. In a recent deployment for a European Tier-1 ISP, swapping generic cables with this model reduced unplanned outages by 22% over six months. For teams managing ASR 9000 fleets, standardizing on this cable eliminates guesswork during upgrades and ensures audits pass without rework. Always perform torque checks on connectors during installation—over-tightening can damage terminals and void warranties.