Re: Emergency/Priority indicators

Hello Miri,

In H.248.1v3 Amm.1 we included the following in clause 6.1.1 to make the 
behaviour clear:
"In general, if a context attribute is completely omitted from a H.248 
action, the attribute of the corresponding context retains its prior value."

With regards to the "special handling" I'm not sure what you mean? What 
would you propose for H.248.1v4?

Regards, Christian

Miri Epstein wrote:
> Hello Christian,
>
> Thans for your response.
>
> About your answer to question 2/:
>
> I couldn't find any explicit reference to that issue in the standard. Am
> I missing it? If not, do you think this should go into the implementor's
> guide?
>
> It appears to me that the reason special handling is needed is because
> the emergency, priority and topology properties are unique in not being
> part of a descriptor. This could have been solved if they were migrated
> to the ContextAttribute descriptor. Does this seem like something that
> can be considered for H.248v4? I know that because of backward
> compatibility, the current mode of operation will always be there, but
> at least it could be deprecated.
>
> Thanks,
> Miri
>    
>
> -----Original Message-----
> From: Christian Groves [mailto:[email protected]] 
> Sent: Friday, February 22, 2008 1:10 AM
> To: Miri Epstein
> Cc: [email protected]; Shaikh, Viqar A. [RA]
> Subject: Re: [Megaco] Emergency/Priority indicators
>
> Hello Miri,
>
> Please see my replies below [CNG].
>
> Regards, Christian
>
> Miri Epstein wrote:
>   
>> Hi,
>>
>> I have some questions regarding the emergency and priority context
>> attributes:
>>
>> 1/ Assuming, for example, that a context was created by an Add command
>> with priority=5. Then a Modify command is issued by MGC with
>>     
> priority=7.
>   
>> Does this mean that the context priority is changed to 7?
>>   
>>     
> [CNG] Yes the priority would be 7.
>   
>> 2/ Assuming, for example, that a context was created by an Add command
>> with the emergency indicator (emergency is ON). A consequent Modify
>> command omitting the emergency indicator is issued by the MGC. Does it
>> mean that this specific context is not anymore an emergency context?
>>   
>>     
> [CNG] If a Context property is omitted then it retains the previous 
> setting. So it would remain on.
>   
>> 3/ Are these scenarios of modifying the context attributes reasonable?
>> Or, is it expected that a specific priority level set to a context
>>     
> will
>   
>> not be changed until the context ceases?
>>   
>>     
> [CNG] I would imagine that in most cases the priority would not be 
> changed once the call/connection is established.
>   
>>     
>> Thanks for your help,
>> Miri
>>
>>  
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>>
>>
>>   
>>     
>
>
>