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| Brand Name : | Cisco | 
| Model Number : | ISR4451-X-AXV/K9 | 
| Certification : | CE | 
Cisco 4451 Integrated Services Router, named as ISR4451-X, which supports 2 Enhanced service-module (SM-X) slots, delivers 1 Gbps to 2Gbps aggregate throughput. This router also supports two kinds of DDRM, data plane and control/services plane, which make administrator easy to manage the router. The Cisco ISR4451-X-AXV/K9 is the 4451 Application Experience with Voice (AXV) Bundle.


Table 1 shows the comparison.
| Product Number | ISR4451-X-AXV/K9 | ISR4351-V/K9 | 
| Product Description | Cisco ISR 4451 AXV Bundle. PVDM4-64 w/APP. SEC. UC lic. CUBE-25. | Cisco ISR4351-V/K9 (3GE,3NIM,2SM,4G FLASH,4G DRAM,Voice Bundle) | 
| Aggregate Throughput | 1 Gbps to 2Gbps | 200 Mbps to 400 Mbps | 
| Total onboard WAN or LAN 10/100/1000 ports | 4 | 3 | 
| RJ-45-based ports | 4 | 3 | 
| SFP-based ports | 4 | 3 | 
| NIM slots | 3 | 3 | 
| Onboard ISC slot | 1 | 1 | 
| Cisco ISR4451-X-AXV/K9 Specification | |
| Product Number | ISR4451-X-AXV/K9 | 
| Product Description | Cisco ISR 4451 AXV Bundle. PVDM4-64 w/APP. SEC. UC lic. CUBE-25. | 
| Aggregate Throughput | 1 Gbps to 2Gbps | 
| Total onboard WAN or LAN 10/100/1000 ports | 4 | 
| RJ-45-based ports | 4 | 
| SFP-based ports | 4 | 
| Enhanced service-module slots | 2 | 
| Doublewide service-module slots | 1 (assumes no singlewide SM-X modules installed) | 
| NIM slots | 3 | 
| OIR (all I/O modules) | Yes | 
| Onboard ISC slot | 1 | 
| Default memory double-data-rate 3 (DDR3) error-correction-code (ECC) DRAM (Combined control/services/data planes) | NA | 
| Maximum memory DDR3 ECC DRAM (Combined control/services/data planes) | NA | 
| Default memory DDR3 ECC DRAM (data plane) | 2 GB | 
| Maximum memory DDR3 ECC DRAM (data plane) | 2 GB | 
| Default memory DDR3 ECC DRAM (control/services plane) | 4 GB | 
| Maximum memory DDR3 ECC DRAM (control/services plane) | 16 GB | 
| Default flash memory | 8 GB | 
| Maximum flash memory | 32 GB | 
| External USB 2.0 slots (type A) | 2 | 
| USB console port -type B mini (up to 115.2 kbps) | 1 | 
| Serial console port - RJ45 (up to 115.2 kbps) | 1 | 
| Serial auxiliary port - RJ45 (up to 115.2 kbps) | 1 | 
| Power-supply options | Internal: AC, DC and PoE | 
| Redundant power supply | Internal: AC, DC and PoE | 
| AC input voltage | 100 to 240 VAC autoranging | 
| AC input frequency | 47 to 63 Hz | 
| AC input current range, AC power supply (maximum) | 7.1 to 3.0A | 
| AC input surge current | <50 A | 
| Typical power (no modules) (watts) | 158 | 
| Maximum power with AC power supply (watts) | 450 (no PoE) | 
| Maximum power with PoE power supply (platform only) (watts) | 1000 with PoE redundant 1450 with PoE boost no redundancy | 
| Maximum endpoint PoE power available from PoE power supply (watts) | 500 W with optional redundancy | 
| Maximum endpoint PoE power capacity with PoE boost (watts) | 950 W no redundancy | 

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