This is a quick reference guide will give you info to get started using your Cisco IP Phone 8800 Series Multiplatform Phones.
Cisco IP Phone 8800 MPP Series – User Guide
The Cisco IP Phones 8811, 8841, 8845, 8851, 8851NR, 8861, 8865, and 8865NR deliver easy-to-use, highly secure voice communications.