Chassis Views
This section includes front and back panel layouts of the Cisco 900 Series ISR, as well as the locations of the power and signal interfaces, interface slots, status indicators, and chassis identification labels.
LED Indicators
The figures and table below highlight the LED indicators found in the bezel or chassis of the 900 series.
Table2. LED Indicators for Cisco ISR 900 Series Routers
| Port | LED Color | Description |
| SYS | OFF | System is off |
| Blink | Boot up phase or in ROM Monitor mode | |
| Steady on | Normal operation | |
| Amber(steady) | Thermal trip | |
| Amber(blink) | ROMMON code signing verification failure | |
| VPN OK | Green | At least one VPN session is active |
| OFF | VPN not connected | |
| LAN | Green(Solid) | LAN connection is established. |
| Green (Blinking) | Data transmission is happening on the link. | |
| OFF | LAN is not connected | |
| WAN | Green(Solid) | WAN link is established |
| Green (Blinking) | Data transmission is happening on the link. | |
| OFF | WAN link is not connected. |
Power Supply
The following are the product power specifications for external power supply units:
- AC input voltage: Universal 100 to 240 VAC
- Frequency: 50 to 60 Hz
- Maximum output power: 18W or 30W depending on the SKU
- Output voltage: +12VDC for system power
Refer to the Cisco 900 Series Specifications document for information on the Cisco 900 Series ISRs.
Periodic Inspection and Cleaning
To reduce the harmful impact of environmental dust or debris, we recommend inspecting and cleaning the router’s external surface on a regular basis. The frequency of examination and cleaning is determined by the severity of the environmental conditions, but we propose once every six months at the very least. Vacuuming the router’s air intake and exhaust vents is part of the cleaning process.
Note:Â Sites with persistently high ambient temperatures and potentially significant amounts of dust or debris may necessitate frequent preventative maintenance cleaning.
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