From: Tonny Kung <[EMAIL PROTECTED]>
2) Regarding the duration of the subscription. Is it ok to tie the
duration to other application state of the dialog?
For example, if an implicit subscription is created with an INVITE
dialog, is it allowed to terminate the subscription when the INVITE dialog
is released? Or do we have to received NOTIFY with
Subscription-State=terminated?
It is clear that the notifier can terminate the subscription if the
resource in question ceases to exist. But it seems that there should
always be a final NOTIFY to ensure the subscriber knows that the
subscription has been terminated. In general, creating subscriptions
as the side-effect of other SIP activities is not generally a good
idea.
Dale
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