I searched our online knowledge base and found the below article that should help you to delete contacts from the address book. Towards the bottom of the article step 8 talks about removing a contact.
Add or Edit Contacts or Recipient Groups in the Device Address Book
If you are still having issues after trying these steps, I suggest that you call into our support department for assistance @ 1-800-821-2797 or 1-800-835-6100
When faxing from desktop, I cannot figure out how to delete a contact from the personal address book.
Even when editting a contact in the personal address book, it seems to actually create a whole new contact retaining the old information as a seperate contact.
I found this but it does not seem to give instructions as to how to delete a contact altogether:
Thanks in advance,
Pettit and Company, North Vancouver, BC