Users are making calls from Cisco IP Phones that are registered on a Cisco Unified
Communications Manager cluster through an H.323 gateway to the PSTN phones. Sometimes
these users report that calls are dropped after they have talked for some time. Different Cisco
Unified CM servers have been rebooted for testing during production hours. Currently Cisco IOS
12.0 is used on the H.323 gateway.
Which change helps to prevent calls from dropping when a Cisco Unified CM server is rebooted
during testing?

A.
Upgrade the gateway Cisco IOS software to a version later than 12.4(4)9T.

B.
A misconfiguration of calling search spaces must exist. Reconfigure the CSS.

C.
There is no scenario where rebooting an H.323 gateway will allow call survivability.

D.
A misconfiguration of VoIP dial peers to the Cicso Unified CM servers must exist. Reconfigure
the VoIP dial peers.