Cisco 8865 - Advanced Operations; Applications; View Active Applications

Cisco IP Phone 8861 and 8865 Wireless LAN Deployment Guide
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SIP Profiles
When creating a new Cisco IP Phone 8861 or 8865, a SIP Profile must be configured.
It is recommended to create a custom SIP Profile for the Cisco IP Phone 8861 and 8865 EX (do not use the Standard SIP
Profile or Standard SIP Profile for Mobile Device).
To create a custom SIP Profile for the Cisco IP Phone 8861 or 8865, use the Standard SIP Profile as the reference template.
Copy the Standard SIP Profile, then change the following parameters.
Timer Register Delta (seconds) = 30 (default = 5)