Cisco Unified IP Phone 7921 - Manual (Page 7)

7
Using the AC Power Supply to Charge the Battery
You can charge your battery quickly by connecting the AC power supply to the phone. To accommodate different AC power
receptacles, you must insert the appropriate AC plug adapter on the AC power supply.
You can use the phone while the battery is being charged. After the battery is charged, you can unplug the power supply cord,
or you can leave the phone plugged into the power cord.
To charge the battery in the phone using the AC power supply, use this diagram:
Using the USB Cable and PC Port to Charge the Battery
You can charge the battery in the phone by connecting your phone with a USB cable to a USB port on you PC. Charging takes
longer when you use the USB port on the PC to charge the battery.
To use the USB cable and USB port to charge the battery, use this diagram and follow the steps:
1 AC plug adapter—Insert the AC plug adapter into the slot on the power supply.
2 AC Power supply—Insert into an AC outlet.
3 Phone connector on AC power supply cable—Insert into the connector slot at bottom of phone.
4 Indicator light—Indicates the charging status:
• Red—Battery charging in process
• Green—Battery charging is completed