RE: ASP Capabilities value 0x2 of interworking field

Brian,


[..snip..]
> > > No, not all SUA SGPs support relaying.  Just as not all STPs act
> > > as an SCCP relay.
> > [TOLGA]Again the point is that they are able to do so based on the
> > specification.
> Again, in practice they don't.  SCCP relay points are normally interior
> to a network, not at the edge.
>
> > >
> > > You are still thinking MTP.  Consider that you have an all-IP
> network with
> > > not SS7 network interworking from the perspective of SCCP and
> SUA:  Where
> > > are you going to place your GTT so that you can administrate
> your network?
> > [TOLGA]SGPs.
> Placing GTT at the edge of the network is not practical.
[TOLGA]At least we agree that SUA SG can act as relay. I disagree with you
that you consider SG at the edge of the network. This is not mandatory by
protocol. You can have them whereever you want and with relaying support
they perform what you want to achieve: allowing easier management of the
network. That is the idea why there is relaying support defined for SGs.
>
>
> > >
> > > Your first diagram would restrict GTT to be located at a node
> > > supporting SS7
> > > network interworking, the SGP.  In an all-IP network there is no
> > > need for an
> > > SGP, so that configuration is too restrictive.
> > [TOLGA]A SGP does not need to have SS7 interface. You put it
> there, if you
> > need to acces conventional SS7 network.
> So in M3UA what is an SGP with no SS7 interface?  An IPSP that supports
> relaying?
[TOLGA]No, still an SG. IPSP is a direct, peer-to-peer relationship between
two applications. SG-SG is a peer-to-peer relationship between two relaying
agents. Whether they relay to a node in conventional SS7 network, to another
IP entity or to a local application is conceptually not important.