I've got a 2801 MGCP gateway with a VWIC2-1MFT-T1/E1 configured as a PRI and using bottom-up channel selection.
All 23 channels are administratively up. The first call is successful and used channel 23.
When channel 23 is in use I can see subsequent calls come into the gateway - even saying that is will use channel 22. However, the "debug isdn q931" output shows that it actualy tries to use channel 23 and fails with:
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.