My team supports multiple products and so has multiple “inboxes” for incoming phone calls.
While the primary and Secondary inboxes seem to work for conversations (they are assigned to primary people first and secondaries as a fallback) this logic does not work for phones. The result is that some people get phones calls for products they do not support (but need to be on the inbox just in case cover is required).
Ideally if someone is listed in a Phone Inbox as a “Secondary” they should only be assigned a call if NO primary teammates for that box are available