NCS1K14-BLANK=: Critical Role, Compatibility,
Defining the NCS1K14-BLANK= in Cisco’s Optical ...
What Is the ASR-9904-DC?
The ASR-9904-DC is a 4-slot chassis from Cisco’s ASR 9000 Series, purpose-built for high-efficiency core and peering networks requiring direct current (DC) power infrastructure. It delivers up to 9.6 Tbps throughput while leveraging -48V DC power systems common in telecom central offices and hyperscale data centers. Designed for operators prioritizing energy savings and operational continuity, it combines the scalability of the ASR 9000 platform with DC power’s inherent reliability.
Core Technical Specifications
- Power Input: -48V DC, supporting dual 3000W feed modules (N+1/N+N redundancy).
- Slots: 4 (2 for route processors, 2 for line cards or redundancy).
- Throughput: 9.6 Tbps with Cisco’s Quantum Flow Processor.
- Cooling: Front-to-back airflow with ASR-9904-FAN= modules, optimized for DC environments.
- Software: Cisco IOS XR with Segment Routing, EVPN, and NetFlow support.
Key Use Cases and Operational Benefits
1. Telecom Central Offices
DC power compatibility aligns with legacy -48V DC plants, eliminating AC/DC conversion losses (up to 8% energy savings).
2. Greenfield Hyperscale Data Centers
Integrates with modern 380V DC busways, reducing cabling complexity and improving PUE (Power Usage Effectiveness).
3. Industrial Network Hubs
Resilient to voltage fluctuations common in industrial grids, with surge protection up to 600V.
ASR-9904-DC vs. ASR-9904-AC: Which to Choose?
| Factor | ASR-9904-DC | ASR-9904-AC |
|---|---|---|
| Power Efficiency | 98% efficiency (no AC/DC loss) | 94% efficiency (AC conversion) |
| Deployment Cost | Lower OPEX in DC-ready facilities | Higher OPEX due to AC infrastructure |
| Redundancy | Dual DC feeds prevent single-point failures | Dual AC phases with PSU redundancy |
| Environment | Ideal for telecom/legacy sites | Suits standard data centers |
Addressing Critical Deployment Concerns
-
Can It Support Mixed AC/DC Power?
No. The chassis is DC-only; hybrid configurations require separate AC/DC routers. -
How to Mitigate DC Grounding Issues?
Follow GR-3108-CORE standards for DC grounding, using the included 6 AWG grounding cable. -
Upgrade Path to 400G?
Yes. Compatible with A9K-4X100GE-SE line cards, upgradable to 400G via QSFP-DD optics. -
Maintenance Best Practices
-
Monitor DC feed stability with Cisco’s CLI (
show environment power). -
Replace DC terminal blocks every 5–7 years to prevent corrosion.
Where to Purchase the ASR-9904-DC
For validated hardware and Cisco Smart Net coverage, the ASR-9904-DC chassis is available at itmall.sale, including DC terminal kits and line card bundles.
Lessons from Tier 1 Carrier Deployments
In a recent Asian telecom upgrade, replacing AC-powered chassis with the ASR-9904-DC cut energy costs by 12% annually—translating to $240K savings per site. While retrofitting DC infrastructure demands upfront investment, its long-term ROI in energy-sensitive environments is undeniable. For operators modernizing legacy DC plants or building sustainable hyperscale networks, this chassis isn’t just an option; it’s a strategic enabler of efficiency and reliability.