Currently I have a CUCM in Arizona. I am in Afghanistan right now with a VPN going back home via satellite. Ping times are anywhere between 800-1500. As long as my phone has the correct firmware, it registers just fine and I can make calls. One of the things I am contemplating is placing a CME on my side of the link to keep phone registrations/firmware downloads on my side and only send signaling and the RTP stream across the tunnel. I am using G729 to save bandwidth, but is there any benefit to placing a CME on my side of the link?
VoIP typically tolerates delays up to 150 ms before the quality of the call is unacceptable. Placing CME locall will also not help you, as IP phone RTp required 150ms of one way RTT and you said your delay is 800-1500. You will have to cut down your RTT to make it work.
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150 ms one way delay is G.114 standard recommendation, in reality 300 ms one way delay is acceptable and not uncommon. Placing local CME will at least cut down on the registration and file download times/ issues.
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.