CCM 5.1, 2821 12.4(11) H.323 gateway
Cannot call some 1866-XXXXXXX numbers. When making calls to several specific 1866 numbers, it displays "connected" on the phone, but user can hear nothing. There is no problem with 911, local and long distance calls.
The attachment is the debug information from a bad call and a good call. I cannot see any difference between them.
Thanks in advance for any help.