PDVN VOIP Cisco 8851 & 8861 telephone user tutorial 

Video time stamps
:15 Phone overview / Buttons on phone
1:40 How to make an outbound call
2:46 How to answer an inbound call
4:05 How to make a 2nd call out when on a call
4:46 How to make a Conference call with 2 outside parties
5:43 How to receive a 2nd inbound call
6:19 How to call another extension
7:12 How to Park calls and retrieve Parked calls
8:43 How to transfer calls onsite
10:17 How to transfer calls offsite
10:56 Phone notifications (blinking red light)
11:37 How to set up voice mail
12:01 How to check voice mail messages from phone
12:55 How to change voice mail password, greeting or name recording
13:36 How to check voice mail messages from email
14:01 How to change display and sound settings, including ring tone