Cisco ASR-920-8S4Z-PD Hardware Installation Manual page 72

Safely Powering Off the Router
Step 5
Remove power cables, if any, from the Cisco ASR-920-10SZ-PD Router:
• For power supplies with a circuit breaker switch, position the switch to the Off (O) position.
• For power supplies with a standby switch, place the standby switch in the Standby position.
Note
Cisco ASR 920-10SZ-PD and Cisco ASR-920-8S4Z-PD Aggregation Services Router Hardware Installation Guide
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After powering off the router, wait for a minimum of 30 seconds before powering it on again.
Cisco ASR 920-10SZ-PD and Cisco ASR-920-8S4Z-PD Routers Initial Configuration