Is there a way for new calls to ring extensions in a call queue even if they are already on the phone?

Is there a way to have users phones ring or beep or something for call queue calls even while they are on the phone? Many times we would prefer to quickly wrap up the current call and pickup the new call rather than having it flow to another agent. At night we may only have one agent available and if they are on the phone the caller waits in queue until they finish or the callers end up having to leave a voicemail. I would like to at least give them the option to place the first caller on hold and pickup the new call. Is there something we should be using besides call queues to set this up? I considered creating an extension but then it looks like the only option is to forward it to other desk phones or outside numbers, not just to another extension.