| Product Type | Modular expansion base chassis |
| Form Factor | Rack-mountable - 6U |
| Dimensions (W x D x H) | 17.8 in x 10.4 in x 25 in |
| Weight | 68.78 lbs |
| Power Device | Internal power supply |
| Power Redundancy | Optional |
| Installed Modules (Max) | 0 (installed) / 4 (max) |
| Expansion Slots | 4 x modular expansion slot |
| Connectivity Technology | Wired |
| Manufacturer Warranty | 1-year limited warranty |
| Service & Support | Carry-in warranty - 1 year - response time: 20 days |
Cisco ASR-9904 Modular Rack-Mountable Expansion Chassis

Key Benefits
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- Scalable expansion with 4 free modular slots enables future-proof network build-outs
- Global standards compliance ensures suitability for international deployments and regulatory environments
- Optional power redundancy enhances infrastructural resilience and service availability
Product Overview
The Cisco ASR-9904 is a modular expansion base designed for high-performance network environments. Its rack-mountable 6U form factor supports up to four expansion slots, enabling scalable network growth. It complies with a wide range of global electrical and safety standards, and offers optional power redundancy for improved uptime. With operational ranges from 41°F to 104°F and humidity support up to 95%, it’s suitable for challenging environments. Backed by a 1‑year warranty and TAA compliance, this chassis is a reliable foundation for service provider and enterprise deployments.
Specifications
Product Overview
Physical & Environmental
| Minimum Operating Temperature | 41 °F (5 °C) |
| Maximum Operating Temperature | 104 °F (40 °C) |
| Humidity Range Operating | 5% to 95% (non-condensing) |
| Cooling Method | Fan tray (modular, dependent on configuration) |
| Rack Units | 6U |
Cloud Management & Licensing
| Cloud Management | Supported via Cisco IOS XR and Cisco Prime Infrastructure |
| Licensing Model | Modular software-licensed features per function |
| Included Licensing | None (line cards and software licensed separately) |
Interfaces
| Expansion Slot Type | Modular slot for ASR 9000 series line cards and controllers |
| Supported Interface Cards | Cisco ASR 9000 line cards, route processors, fan trays |
| Uplink Ports | Dependent on installed modules |
| Interface Speed | Up to 100 Gbps per slot (module-dependent) |
Compliance & Origin
| Country of Origin | Brazil / China / Mexico |
| Trade Agreement Act (TAA) Compliant | Yes |
| Compliance Standards | ETSI, BSMI, CISPR 22 Class A, EN 55022, VCCI Class A, EN 55024, EN 61000-6-1 |
| EMC Standards | FCC CFR47 Part 15, ICES-003 Class A, AS/NZS 60950-1, EN 300 386 |
| Safety Certifications | EN 60950-1, IEC 60950-1, FDA, EN 60825 |
| Environmental Standards | IEC 61000-4 series (2, 3, 4, 5, 8, 11) |
Advanced Security Features
| Operating System | Cisco IOS XR |
| Control Plane Protection | Yes (via Cisco IOS XR features) |
| MACsec (802.1AE) Support | Module-dependent |
| Access Control Lists (ACLs) | Supported (platform level) |
| Network Address Translation (NAT) | Supported in software |
| Firewall Capabilities | Available via software configuration and hardware modules |
| Secure Boot and Image Verification | Yes (Cisco IOS XR supports secure boot and image signing) |