Add 5 commas after the voice mail access number followed by your voicemail
name and password.
999-999-9999 , , , , , 888-888-8888# ,, 7777#
where 999 is the voice mail access number
888 is my phone number/voice mail account followed by a pound sign
7777 is my password, again followed by a pound sign.
You may need to fiddle with the commas but it works really well to push that
little button and say "Call Voice Mail" while driving down the road.
The comma is pretty universal for a 2 second dialing pause.