Cisco 7921G - Manual (Page 25)

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Cisco Unified Wireless IP Phone 7921G Administration Guide for Cisco Unified CallManager Release 4.1, 4.2, 5.0
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Chapter 3 Setting Up the Cisco Unified Wireless IP Phone 7921G
Powering On the Cisco Unified Wireless IP Phone 7921G
Active and Standby Phone Modes
When the Cisco Unified Wireless IP Phone 7921G is powered on, it can be in one
of these two modes:
• Active mode
• Standby mode
Active mode
The phone is in active mode when there is an active RTP stream. When the phone
is performing one of these actions, it is consuming power:
• Connected to an active call
• Scanning for channels
• Sending CDP packets
• Sending keep-alive messages
• Reregistering with Cisco Unified CallManager
The standard battery provides up to 10 hours of talk time in active mode and the
extended battery provides up to 12 hours of talk time.
Standby mode
The phone goes into standby mode two seconds after a scan is complete.