Cisco 8865 - Switch to Active Applications; Close Active Applications; Mobile and Remote Access Through Expressway

Cisco IP Phone 8861 and 8865 Wireless LAN Deployment Guide
110
Timer Keep Alive Expires (seconds) = 300 (default = 120)
Timer Subscribe Expires (seconds) = 300 (default = 120)
Timer Subscribe Delta (seconds) = 15 (default = 5)
Ensure SIP Station KeepAlive Interval at System > Service Parameters > Cisco CallManager remains configured for 120
seconds.
Custom 8861 SIP Profile