In order to resolve this issue, perform these steps:
Upgrade to version 12.4.4XC4.
Enable this hidden Command Line Interface (CLI) command:
3725#config t
!--- Enter configuration commands, one per line. End with CTRL/Z.
3725(config)#voice service voip
3725(conf-voi-serv)#h323
3725(conf-serv-h323)#h245 signal update
3725(conf-serv-h323)#end