The Cisco 4451-X-AX ISR includes IP Base, Security, and AppX licensing with RTU for 2500 ISR WAAS or virtual WAAS (vWAAS) connections, licenses for Cisco Packet Voice DSP Module 4-64 (PVDM4-64, Unified Communications (UC), and CUBE, 4-GB DRAM and 8 GB of flash memory by default. It does not include solid-state drives (SSDs) and additional memory that are required for ISR WAAS.
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