ChatGPT 说: الدعم الشامل لأجهزة Cisco ISR4321، ISR4331، ISR4431، و ISR4461: كل ما تحتاج معرفته
Answer first: ISR support depends on the exact PID, serial number, lifecycle milestone, software release, entitlement, region, and service level purchased on the applicable contract. Verify the official ISR support page, the Cisco service description, and ISR FAQ hub, lifecycle review, feature comparison, migration ...