Entering Phone Numbers manually

Since the LG-325 does not have any way to transfer phone number from its phone book to the Prius and the Sprint 6601 phone book transfer does not work, I figured I could just dial a number and then transfer it from the outgoing calls to the One-Touch-Dial or Phonebook. My question is, how do I enter pauses (usually a comma) so I can, for example) dial my office voicemail and pause and enter the access code? There is a * and + on the dialing screen. What does the + do?

For those of you who can transfer contacts from your phone, does the comma or pause work?