3-17
Cisco Unified Wireless IP Phone 7925G Administration Guide for Cisco Unified Communications Manager 7.0(1)
OL-15984-01
Chapter 3 Setting Up the Cisco Unified Wireless IP Phone 7925G
Understanding the Phone Startup Process
• Reregistering with Cisco Unified Communications Manager
The standard battery provides up to 11.5 hours of talk time in active mode and the extended battery
provides up to 15.5 hours of talk time.
Standby Mode
The phone goes into standby mode two seconds after a scan is complete. The phone awakes 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 150 hours of standby time and the extended battery provides up to
200 hours of standby time.
Related Topics
• Understanding the Phone Startup Process, page 3-17
• Resolving Startup and Connectivity Problems, page 10-1
Understanding the Phone Startup Process
When connecting to the wireless VoIP network, the Cisco Unified Wireless IP Phone 7925G goes
through a standard startup process, as described in
Table 3-5. Depending on your specific network
configuration, not all of these steps may occur on your wireless IP phone.
Ta b l e 3-5 Cisco Unified Wireless IP Phone Startup Process
Step Description Related Topics
1. Powering on the phone The Cisco Unified Wireless IP Phone 7925G 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 3-7
Resolving Startup and
Connectivity Problems,
page 10-1
2. Scanning for an access
point
The Cisco Unified Wireless IP Phone 7925G scans the RF
coverage area with its radio. The phone searches its
network profiles and scans for access points that have a
matching SSID and authentication type. The phone
associates with the access point with the highest RSSI that
matches with its network profile.
Interacting with Cisco Unified
Wireless APs, page 2-11
Resolving Startup and
Connectivity Problems,
page 10-1
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