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Cisco 1120 Connected Grid Router Hardware Installation Guide
OL-26438-02
Chapter 3 Router Hardware Description
Hardware Features
Real-Time Clock (RTC)
The router features an integrated real-time clock (RTC) with battery backup that supplies the system
software with accurate date and time information. The integrated router GPS compares the current RTC
time with the time at which it last received a valid signal to ensure accurate timekeeping on the router.
When the router is powered on using the
CONFIG Reset Button
, the RTC sets the router memory
controller and clock frequency.
RTC Battery
The RTC includes battery backup for the date and time when the router is not receiving any power.
Specifications
Temperature Sensor
The router hardware features an internal temperature sensor used by the router software to monitor the
system operating temperature. The router can be configured to generate alerts when the temperature falls
outside of a user-defined temperature range. The router can also be configured to store historical
temperature data.
For more information about monitoring and storing router temperature data, see the
Cisco 1000 Series
Connected Grid Routers Software Configuration Guide Set
.
Specification
Description
Battery type
High-capacity lithium (550 mAh)
Battery life span
10 years
Supported interrupts
Time-of-day alarms (Range: 1/second – 1/month)
Periodic rates (Range: 122 us – 500 ms)
End-of-update-cycle notifications
