Hi John,
Security Warning for using NOTIFY without subscription:

http://pentest.tele-consulting.com/advisories/05_07_06_voip-phones.txt

 Regards,
Peggy Stumer


-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Peili Xu
Sent: Thursday, July 14, 2005 7:34 AM
To: Wainwright, John; [email protected]
Subject: RE: [Sip-implementors] MWI

Hi John: 

    Rfc3265 indicate the meaning of allow-events: 

   -- The "Allow-Events" header, if present, includes a list of tokens
   -- which indicates the event packages supported by the client (if sent
   -- in a request) or server (if sent in a response).  In other words, a
   -- node sending an "Allow-Events" header is advertising that it can
   -- process SUBSCRIBE requests and generate NOTIFY requests for all of
   -- the event packages listed in that header.

   The method you mention is enough. There is no need for the UA which
subscribes the MWI event to carry Allow-Events: Messages-summary" be cause
it will not provide notification of MWI

   Best reguards!
   Peili Xu
__________________________________________________________________
Peili Xu
System Engineer Core Network Research & Standard Department
Huawei Technologies Co., Ltd
Email:   [EMAIL PROTECTED]
Phone:  +86-755-28780808
Website: www.huawei.com
__________________________________________________________________

-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Wainwright,
John
Sent: Thursday, July 14, 2005 5:43 AM
To: [email protected]
Subject: [Sip-implementors] MWI

To support Message Waiting Indication is it enough to Subscribe with header
field "Events: message-summary" and process the NOTIFY responses with the
Messages-Waiting field or do I also need to REGISTER/send out INVITEs with
the "Allow-Events: message-summary" field set ?

Thanks
John
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