I understand currently Unity endpoint was not under call preservation protection. When it will be supported ?
The design scenario is that customer has 1 HQ and a couple of remote sites interconnected by VPNs. CCM is deployed in centralized fashion but each site will have their own Unity to avoid QoS issue with voice mail operation. Those Unitys are interconnected by digital networking. Each remote site will have their own PSTN gateway.
In the case that external caller connects to remote gateway, leaving vm to the remote Unity, the RTP stream is localized. However the skinny still runs across the VPN. If the VPN fails at that time and remote Unity does not support call preservation, the call will be dropped even though no RTP packet is lost.
If the customer really wants no interruption, the only alternative is to have CCM deployment decentralized. Any other alternatives ?
What type of signaling are you using between the gateway and CallManager? Unity shouldn't drop the call if an IP phone doesn't however all DTFM tones will not be send since those are handled as out of band SCCP messages.
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.