SIP Profiles
When creating a new Cisco Wireless IP Phone 8821 or 8821-EX, a SIP Profile must be configured.
It is recommended to create a custom SIP Profile for the Cisco Wireless IP Phone 8821 and 8821-EX (do no use the Standard
SIP Profile).
To create a custom SIP Profile for the Cisco Wireless IP Phone 8821 or 8821-EX, use the Standard SIP Profile as the
reference template.
Copy the Standard SIP Profile, then change the following parameters.
Time Register Delta (seconds) = 30
Time Keep Alive Expires (seconds) = 300
Time Subscribe Expires (seconds) = 300
Time Subscribe Delta (seconds) = 15
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