Cisco Unified Wireless IP Phone 7925G Series Deployment Guide 71
Note: If the TFTP IP is changed which is not included in the current Certificate Trust List (CTL) file, then TFTP will fail and
may prevent the phone from registering successfully to the Cisco Unified Communications Manager. The CTL file will need to
be erased manually in the Security Configuration menu from the Cisco Unified Wireless IP Phone 7925G Series.
Configuring Advanced Network Profile Settings
In the Advanced Network Profile settings, the minimum PHY rate can be adjusted. If 12 Mbps is not enabled in the wireless
LAN, then this parameter may need to be configured or enable 12 Mbps on the access point.
By limiting number of channels to be scanned, this can help reduce the time for access point discovery while passively scanning
DFS channels in 802.11a mode. This can also help preserve battery life.
If using this feature, then only disable those channels that are not used in the wireless LAN. If a channel is disabled that is
currently used by an access point, then the Cisco Unified Wireless IP Phone 7925G Series might not associate to the wireless
LAN successfully.
If all channels that are used in the wireless LAN are disabled on the phone, then use one of these methods to browse to the
Cisco Unified Wireless IP Phone 7925G Series webpage:
• USB cable connected to the PC where full web access was previously enabled
• Re-enable all channels by using the factory default
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