Make these additions to the gateway configuration to allow the gateway to generate the ringback instead of the originating switch:
On relevant POTS dial-peers:
progress_ind alert enable 8
progress_ind progress enable 8
progress_ind connect enable 8
Refer to Configuring Progress Indicator in H.323 POTS Dial Peers.
On relevant VoIP dial-peers:
progress_ind setup enable 3
Refer to PSTN Callers not Hearing any Ring Back When They Call IP Phones.
You should be running Cisco IOS? version 12.2(3) or later.
Check that the Cisco CallManager parameter ToSendH225UserInfoMsg is set to True. Go to Service > Service Parameters > Select server > Cisco Call Manager.
For more information on ringback, refer to the No Ringback to PSTN when IP Phones Initiate a Call Transfer (Cisco CallManager 3.0 or Unity Voice Mail) section of Troubleshooting No Ringback Tone on ISDN-VoIP (H.323) Calls.
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.