Cisco 7921G - Manual (Page 26)

Chapter 3 Setting Up the Cisco Unified Wireless IP Phone 7921G
Understanding the Phone Startup Process
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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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The phone will awake from standby mode in response to these events:
• Pressing keys on the keypad
• Roaming between APs
• Power cycling the phone
• Losing network connectivity
• Losing RF connectivity
• Transmitting scheduled CDP or keep-alive packets.
The standard battery provides up to 80 hours of standby time and the extended
battery provides up to 100 hours of standby time.
Related Topics
• Understanding the Phone Startup Process, page 3-26
• Resolving Startup and Connectivity Problems, page 9-1
Understanding the Phone Startup Process
When connecting to the wireless VoIP network, the Cisco Unified Wireless
IP Phone 7921G goes through a standard startup process, as described in
Table 3-6 . Depending on your specific network configuration, not all of these
steps may occur on your unified IP phone.
Table 3-6 Cisco Unified Wireless IP Phone Startup Process
Step Description Related Topics
1. Powering on the
phone The Cisco Unified Wireless IP Phone 7921G
has non-volatile Flash memory in which it stores
firmware images and user-defined preferences.
At startup, the phone runs a bootstrap loader that
loads a phone image stored in Flash memory.
Using this image, the phone initializes its
software and hardware. Providing Power to the
Phone, page 3-10
Resolving Startup and
Connectivity Problems,
page 9-1