Is this MGCP or H323 gateway? Either way, the calls sent to the channels that don't exist on the PSTN switch will fail. CM doesnt know whether or not a particular B channel is actually in service. If the router is configured for a full PRI and you actually only have 10 channels, the gateway will still attempt to use the additional channels that you have configured. Therefore as Paolo stated, you should configure the cisco device only for the amount of channels that you actually have.
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.