That all depends on the implementation of the protocol stack itself.  One
can implement a protocol stack that is only for UAs, only for proxies, and
so on.  Most stacks are general purpose and thus are presumably useful to
build any type of SIP entity.

>From our experience, if you model your stack correctly then most of its
internal components can stay the same in all types of SIP entities. 

Regards,
  Itamar

> -----Original Message-----
> From: Victor Kueh [mailto:[EMAIL PROTECTED]]
> Sent: Tue, March 06, 2001 1:31 PM
> To: [EMAIL PROTECTED]
> Subject: [Sip-implementors] Question on protocol stacks in SIP server
> 
> 
> Dear All,
> 
>             Correct me if I'm wrong, but is it true to say that SIP
> proxy servers have the same protocol stacks as UACs, although they are
> like 'routers' in SIP architecture?
> 
> Thanks for your help.
> 
> Cheers,
> Victor
> 
> 
> 
> 
> 
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