AW: [Sipping-tispan] TISPAN requirements, first requiements

["Schmidt, Christian" <[e-mail]>]

Some comments:

2. Overview
"small variations are expected when compared with the equivalent ISTD/PSTN supplementary services"
Can you provide an example for such a variation?

3.1 General Requirements
"the user should receive the service without any degradation"
This seems to be somehow in contradiction with the "variation" passage in the overview section. Or do you mean variation as addon only?

3.2 ACR
- In the first section, you describe ACR, but not the override mechanism. You should add an explanation here.
- ACR2: the term "allowing the callee to receive" is somehow missleading. According to my understanding, the callee cannot influence the delivery of such calls. Proposal: "allowing anonymous calls to be provided to callees, in spite of an activated ACR service."
- "This is needed...". This is not a requirement, it is an explanation and should be part of the service description at the begin of the section.

There should also be a general requirement included:
GEN-3: "SIP UA not providing this simulation service should not be influenced, they are simple not able to provide the related service."

Security Considerations:
Idea:
Threat: Fake override condition
Method: How to avoid, for example with a short description of the planned authentication and authorization methods.

Regards
Christian Schmidt




-----Ursprüngliche Nachricht-----
Von: [e-mail] [mailto:[e-mail]] Im Auftrag von Miguel Garcia
Gesendet: Dienstag, 23. August 2005 11:35
An: [e-mail]
Cc: Alexeitsev, D
Betreff: [Sipping-tispan] TISPAN requirements, first requiements


Folks:

Since we are tasked to re-draft the TISPAN requirements adding as much 
clarifications as possible, we would like to start checking with you if 
the requirements related to the Annonymous Communication Rejection (ACR) 
service is OK and understandable by everyone.

So please take a look at the first version of the (much incomplete and 
short) draft in either text or HTML:

http://people.nokia.net/~miguel/drafts/pre/draft-jesske-sipping-tispan-requirements-02a.txt
http://people.nokia.net/~miguel/drafts/pre/draft-jesske-sipping-tispan-requirements-02a.html

The document is fairly short at the moment. Please post your comments here.

/Miguel
-- 
Miguel A. Garcia           tel:[phone]
sip:[e-mail]
Nokia Research Center      Helsinki, Finland


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