Hi all,
   I have a couple of queries regarding event notification using 
Subscribe / Notify messages.

1. Can two Sip elements send subscribes to each other on the same 
dialog i.e, after a dialog has been established between the 
subscriber and notifier can the notifier send a subscribe for some 
other event package on the same dialog?
  Is there any real world scenario which uses this facility?

2. Suppose a subscription has been made on a dialog created by an 
Invite. And the Call created by invite is termintated by a Bye. 
The subscription will continue to exist for the same dialog. Now 
can an Invite be sent on the same dialog?

Thanks and Regards,
   Vijeth
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