1. what is the number in the call log, and can it be dialed without the 9 and the 1? Example, the call log shows an incoming call from 2135551212, it can't be called back because it doesn't include 1 in front of the area code, and it doesn't include 9 for outside calls. Short codes can be set up in the User and the ARS table to bypass dialing 9 and if ARS receives 10 digits it can know to add the 1 in front of the area code. Another approach would be, if none of your extension numbers begin with 1, add the digit 1 in the prefix section of the line and create a system short code of 1N / Dial / 1N / ARS . Numbers in the log will be 12135551212 and you can return calls directly.

The default short code for voicemail is *17, dial it from the single line phone and you will reach the login prompt