Hi,

I think the Subscribe/Notify approach would be appropriate for your
needs. Specially the dialog event package defined in
draft-ietf-sipping-dialog-package-05.txt. Take a look at it and to its
references.
Although it is not yet a standard, it will...some day...

Samuel.


Unclassified
>>> Hyoungjoon Park <[EMAIL PROTECTED]> 01/28/05 01:01AM >>>
Hi all,
 
    I have some questions about checking status of IP phone.
 
    I wonder if there's any way to keep tracking of the IP phone's
status.
In case when one of phones might be power-off or transport links
beetween
phones and the proxy server got disconnected, the server could not
figure
out the status of phones.
    Knowing of the status of phone - especially dialog status - would
be
very important in terms of "call logging or accunting".
 
    I've considered using Subscribe/Notify methods but I'm not sure
what
would be the practical solution for this.
    Do I have to use some kinds of proprietary messages such as a
Skinny
from Cisco ?
 
Thanks
Jun
    
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