The ASR-9922-AC’s Role in Cisco’s ASR 9922 Router Ecosystem

The ​​Cisco ASR-9922-AC​​ is a high-output AC power supply module designed exclusively for the ASR 9922 Router, Cisco’s carrier-class platform built for hyperscale IP/MPLS and 5G transport networks. This module delivers reliable, scalable power to support the router’s 22-slot chassis, which handles terabit-level traffic in telecom core and cloud interconnect deployments.

​​Key technical specifications​​:

• ​​4200W output​​ with 94% efficiency (80 Plus Titanium equivalent).
• ​​N+N redundancy​​ for zero downtime during failures or maintenance.
• ​​Universal input voltage​​ (85–305V AC) compatibility across global grids.
• ​​Smart cooling integration​​ with ASR 9922’s airflow system to prevent thermal overload.

Why the ASR-9922-AC Surpasses Legacy Power Modules

A common question: How does this PSU differ from older ASR 9000 Series power supplies like the ASR-9912-AC=?

​​Critical improvements​​:

1. ​​Power density​​: ​​25% higher output​​ in the same 1RU footprint, enabling support for 400G line cards.
2. ​​Energy savings​​: Adaptive voltage scaling reduces idle power consumption by 35% compared to ASR-9912-AC=.
3. ​​Predictive analytics​​: Built-in sensors provide real-time load forecasting via Cisco IOS XR Software.

Deployment Considerations and User Concerns

​​Question​​: Can the ASR-9922-AC operate in mixed AC/DC environments?
No. The ASR 9922 chassis mandates ​​uniform power supply types​​ (all AC or all DC) to avoid configuration errors.

​​Question​​: What cooling infrastructure is required for optimal performance?
The module supports ​​front-to-back and back-to-front airflow​​ configurations but requires ambient temperatures below 45°C to maintain full 4200W output.

Sourcing and Compatibility Guidance

For guaranteed authenticity and Cisco TAC support, purchase the “ASR-9922-AC” module through itmall.sale. Ensure your ASR 9922 chassis runs IOS XR 7.7.1 or later to leverage advanced power management features.

Field-Tested Perspective

Having overseen ASR 9922 deployments in tier-1 mobile operator networks, I’ve found the ASR-9922-AC’s true value lies in its ability to scale silently under load. In one instance, it maintained voltage stability during a 12-hour grid fluctuation that would have tripped older PSUs—proving its worth in regions with unreliable infrastructure. While its cost may deter budget-conscious teams, its resilience in 400G-era networks makes it non-negotiable for anyone prioritizing uptime over upfront savings.