I've got a 2851 which functions as a NAT gateway to the Internet as well as running CME 4.1. While I can register phones internally without any trouble to the internal IP, I haven't been successful with doing so to the external global IP on the NAT outside interface.
I can't seem to get to TCP port 2000 on the otuside interface(telnet to this port will time out) however if I add a NAT rule to the internal IP (port 2000 tcp), I can connect - but the phone still won't register.
I have tried changing the ip source-address command under telephony-service but this hasn't solved the problem. I haven't explicitly blocked tcp port 2000 with any ACL.
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.