Have a customer who has been using this feature for about 2 years with no problems. All of a sudden after pressing "7" you hear MOH for a few seconds then "I'm sorry the party you're trying to reach is unavailable", then back to his greeting. These tests were ran at around 10am and the call only went out roughly 1 out of 15 times. Since posting here I tried it 3 times and was able to hit his cell phone every time. What do you think???