Re: Upper boundary of Adaptation Layers

Brian,

I am happy about your statements

> > [Ilie] Therefore an implementation of SUA Layer in may not have any
> > other primitives than SCCP/SCCP-User primitives. Is this correct?
> >
>
>  Read on:
>
> > >It does not say that nothing else is supported or
> > > supportable.  It does not say that no other primitives shall be used.
> > > It is just the list of intentionally supported primitives.
>
> I don't know what you mean by "rely on."

[Ilie] My understanding is that SCCP-users are standardized as
application layers using services provided by SCCP in its primitives
to the SCCP-Users. Thus applications rely (read use) SCCP upper
boundary as of Q.711.

>All SS7 stacks are vendor
> specific.  The only thing an application can rely upon is the interface
> provided by the vendor.
>
[Ilie] I believe it is not very difficult for SCCP User applications
to change from SCCP layer of one vendor to another (or from SCCP use
to SUA), they anyway follow the primitives of Q.711.

--
Ilie