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Cisco Unified Wireless IP Phone 7921G Accessory Guide
OL-11926-02
AC Power Supply
Figure 1 AC Power Supply
Table 2 provides approximate battery charging times for the two battery types and power supply
configurations. You can check the battery charging state on the phone display.
.
Caution Use only Cisco specified AC power supplies for the Cisco Unified Wireless IP Phone 7921G.
1 AC plug adapter—Insert into slot on power supply.
2 AC power supply—Insert into AC outlet.
3 Phone connection—Insert into slot at bottom of phone.
4 Indicator LED—LED is red while battery is charging and turns green when
battery is charged.
Table 2 Approximate Battery Charging Times
Battery Type
Power Supply
Connected to Phone
Power Supply Connected
to Desktop Charger
Phone Connected to Computer
with USB Cable
Standard 2 hours 2 hours 5 hours
Extended 3 hours 3 hours 7 hours