I haven't heard of one of those. Is it a Avaya system? If not, post in the 'General Telephony' forum.
Da-vi'do Juan-is'imo
P.S. For the best response to a question, read FAQ222-2244. Also give the type & version of your voice mail & pbx & preview your post to make sure it is complete & understandable. Please answer all questions so that I may have the info to assist you. Leaving a post on how you fixed the problem will also be appreciated.