In the pre 8.04 webgui and still in CLI it is possible to add secondary numbers to ephone-dns. We use this a lot in case users have DDI-numbers. The benefit of this method is that often on internal calls we don't want to use CFNA or CFB, only on external calls. The CCA-way is adding translations to route DIDs to internal extensions. This way we cannot use different No Answer/Busy rules for external calls.
If we add secondary numbers via CLI or Webgui, we can't use CCA anymore but it deletes these settings after changing an item. Is there a possibility that secondary numbers get a comeback or is this of the UC radar ?? I thought of a different method and that is to add the DDI-numers as extensions in the UC and use overlay buttons.