Cisco 8861 - Adjust the Handset Rest; Secure the Phone with a Cable Lock

Cisco IP Phone 8861 and 8865 Wireless LAN Deployment Guide
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Protected Extensible Authentication Protocol (PEAP)
Protected Extensible Authentication Protocol (PEAP) uses server-side public key certificates to authenticate clients by creating
an encrypted SSL/TLS tunnel between the client and the authentication server.
The ensuing exchange of authentication information is then encrypted and user credentials are safe from eavesdropping.
PEAP-GTC and PEAP-MSCHAPv2 are supported inner authentication protocols.
PEAP requires that a user account be created on the authentication server.
The authentication server can be validated via importing a certificate into the Cisco IP Phone 8861 and 8865.