I have an H.323 gateway configured between my CallManager cluster and an Alcatel 4400 PBX. There are no routers involved, I am just pointing to the IP address of the Alcatel and visa versa.
Everything works OK apart from when I call an extension off the Alcatel; I do not hear ringtone on the CallManager handset. However the handset rings and when picked up, all works OK.
When a user on the Alcatel system calls a CallManager handset, ringtone is heard on the Alcatel and again all works OK.
Any assistance appreciated.
PS: CallManager 4.1(3)