Cisco 4331 Integrated Services Router delivers 100 Mbps to 300 Mbps aggregate throughput and offers one Enhanced service-module (SM-X) slot, which supports for both single- and double-wide service modules provides flexibility in deployment options.
Figure 1 shows the appearance of Cisco ISR4331/K9.
Table 1 shows the Quick Specs.
| Product Code | Cisco ISR4331/K9 |
| Aggregate Throughput | 100 Mbps to 300 Mbps |
| Total onboard WAN or LAN 10/100/1000 ports | 3 |
| RJ-45-based ports | 2 |
| SFP-based ports | 2 |
| Enhanced service-module (SM-X) slot | 1 |
| NIM (Network Interface Modules) slots | 2 |
| Onboard ISC slot | 1 |
| Memory | 4 GB (default) / 16 GB (maximum) |
| Flash Memory | 4 GB (default) / 16 GB (maximum) |
| Power-supply options | Internal: AC and PoE |
| Rack height | 1 RU |
| Dimensions (H x W x D) | 44.45 x 438.15 x 438.15 mm |
| Package Weight | 12.96 Kg |
Note:
| ① | USB Type B mini port | ⑤ | Management port |
| ② | Serial console port | ⑥ | LEDs |
| ③ | USB Type A port | ⑦ | AC Power |
| ④ | AUX Port | ⑧ | Power switch |
The LEDs include eight indicators.
Table 2 shows the LED descriptions.
| LEDs | Represents | Color | Description |
| POE0 | POE PSU | Green | PoE is on and providing power. |
| Amber | PoE is in a failed condition. | ||
| Off | PoE supply is not present. | ||
| FLASH | System Flash Status | Blinking Green | Compact flash/eUSB flash is present and currently being accessed. |
| TEMP | Temperature Status | Solid green | All temperature sensors in the system are within acceptable range. |
| Amber | One or more temperature sensors in the system are outside the acceptable range. | ||
| Off | Temperature is not being monitored. | ||
| PWR | System Power | Green | System power is on and functioning correctly. |
| Green blinking | System power is in the process of shutting down. | ||
| Amber | System power is up, but low level initialization failed. | ||
| Amber blinking | System power is up, but the system failed to come out of reset. | ||
| Off | System power is off. | ||
| SSD | mSATA Slot Status | Green | SSD mSATA is present and enabled. |
| Amber | Initialized with error. | ||
| Off | Not present. | ||
| ISC | ISC Slot Status | Green | PVDM4 is present and enabled. |
| Amber | Initialized with error. | ||
| Off | Not present. | ||
| FAN | Fan Status | Green | All fans are operating. |
| Amber | One fan has stopped working. | ||
| Blinking Amber | Two or more fans have stopped working, or the fan tray has been removed. | ||
| Off | Fans are not being monitored. | ||
| STAT | System Status | Solid green | System operating normally. |
| Blinking amber | BIOS/Rommon is booting. | ||
| Amber | BIOS/Rommon has completed booting, and system is at Rommon prompt or booting platform software. | ||
| Off | System is not out of reset or BIOS image is not loadable. |
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