Cisco 7925G Administration Guide - Page 73

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. Table 3-5 Cisco Unified Wireless IP Phone Startup Process Step 1. Powering on the phone 2. Scanning for an access point Description Related Topics 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 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 OL-15984-01 Cisco Unified Wireless IP Phone 7925G Administration Guide for Cisco Unified Communications Manager 7.0(1) 3-17