Cisco 7925G Deployment Manual page 101

Once the certificate is installed successfully, a confirmation page will be displayed.
The CA chain should already be enabled in the authentication server's certificate trust list.
The authentication server certificate must also be imported into the Cisco Unified Wireless IP Phone 7925G, 7925G-EX, and
7926G for both the MIC and User Installed methods. If the authentication server certificate was signed by a Certificate
Authority (CA) server, then that DER encoded root certificate will need to be imported into the Cisco Unified Wireless IP
Phone 7925G, 7925G-EX, and 7926G.
If the Cisco Unified Wireless IP Phone 7925G, 7925G-EX, and 7926G has not registered to a Cisco Unified Communications
Manager yet, then the date and time must be configured manually for the first time.
With 1.4(3)SR1 and earlier releases, the Cisco Unified Wireless IP Phone 7925G, 7925G-EX, and 7926G does not have
timezone support, therefore a recently signed certificate may not be valid yet if the local time of the Cisco Unified Wireless IP
Phone 7925G, 7925G-EX, and 7926G is west of Greenwich Mean Time (GMT).
As of the 1.4(4) release, timezone support has been added, which can allow newly issued certificates to be immediately used.
Cisco Unified Wireless IP Phone 7925G, 7925G-EX, and 7926G Deployment Guide
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