Re: how much bandwidth I need for one voice channel
This depends, do you have VOFR or VOIP? If VOIP, then as other response says, 11-12k with vad and cRTP. VOFR is 10k/call for g729 and there is no cRTP for VOFR, vad can help to some extent. So for 56k, you can run up to 5 calls comfortably if you do traffic-shapign and prioritization correctly.
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.