Lavis,

IMO this has to be considered parameter duplication, and hence an error.

        Paul

Lavis wrote:
> Hi all,
>  
>     If someone know that the following header is valid in SIP syntax or not?
>    
>     <Quote>
>     Via: SIP/2.0/UDP pc33.atlanta.com;branch=z9hG4bKnashds8;branch
>     </Quote>
>  
>     Here if we can think the first branch is the Via branch parameter, 
> and the second branch is a generic parameter as a extension? or we 
> should think the second branch is the duplication of the first branch?
>  
>     More generally, if the same token can represent as a well-known 
> parameters name and a generic parameter name? or we should think this is 
> a parameter duplication and reject the message?
>    
> Regards,
> Lavis
>  
> 
> 
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