Chapter 12 TroubleshootingZone Paging152 Application Gateway Administration GuideZone PagingIn the Administration Tool, the page for creating a zone does not list anyphones or does not list all phones in the Available Extensions list.First, determine if the Application Gateway system log includes messagesabout synchronization problems. If there are no such errors, go to theAdministration > Licenses page and verify that the correct number oflicenses are installed. If that is not the problem, log into the LicenseMonitor (click Operation > Advanced) verify that all phones have a statusof “active.” If a required phone is not active, right-click it and change itsstatus.No phone is receiving a page although everything is configured correctly.Verify that the version of firmware the phone is using is supported.Some, but not all, phones receive pages.Verify that there are no network problems and that the zones have thecorrect permissions. If the phones not receiving pages have had an IPaddress change since the last IP/DN synchronization, perform asynchronization. If you use Application Gateway clusters, verify that theIP phones being paged are associated with an Application Gateway that ispart of the cluster.An in-progress page is terminated.Application Gateway maintenance functions that require a server restart(such as uploading an Application Gateway configuration or changingnetwork interface settings) terminate a page. It is recommended that youperform maintenance functions when Voice Office application use is at aminimum. Note that adding or removing a zone terminates pages.