Essentially, one my reference is unable for policy reasons is unable to give out his number (I don't know why, but this is answer I received). I know he has and will give me a good reference, but I am unsure how to point out the fact the potential employer will have to asked to be transferred to his current location which may depend on the time of day, that is he may be inside the facility or inside his office.
Edit: I should make a note that this reference must be included on the resume.