Re: ASP Capabilities value 0x2 of interworking field

Brian,

could you please answer the following questions

1) Can SG register via RKM? If not, why the value 0x2 that indicates
Signalling Gateway?

2) Is there any difference between capabilities 0x0 and 0x1 in SUA

     0x0 indicates no interworking with SS7 Networks.
     0x1 indicates IP Signalling Endpoint (ASP), interworking with SS7
        networks.

I was more after a definition of the Relay capability in SUA
framework. Although SUA RFC mentions Relay and describes it, the
definition of Relay is missing.

Thank you in advance

Ilie


On 12/19/05, Brian F. G. Bidulock <[email protected]> wrote:
> Ilie,
>
> An SG supports SS7 interfaces, a Relay does not (necessarily).
>
> --brian
>
> Ilie Glib wrote:                       (Mon, 19 Dec 2005 10:48:15)
> > Hello Brian,
> >
> > thank you for your answer.
> >
> > I see some contradictions in your answer. According to your claims
> > Endpoint  <= Relay  <= SG.
> >
> > Just for clarification, according to my understanding RKM procedures
> > cannot be initiated from SGPs. When a Signalling Process registers its
> > capabilities (RKM is the only case where ASP Capabilities are visible
> > in SUA), the capability of Relay means that incoming SUA messages can
> > be relayed after AMF to a SUA peer instance. Please note that GTT can
> > be part of SUA Relay. So from this point of view the Relay is not part
> > of GW function, although GTT is. In this sense the description in
> > "1.3.1.2.  Signalling Gateway as relay-point" is not consistent.
> >
> > Accoding to my understanding the Endpoint can be (served) by ASP, or
> > IPSP, the Relay can be IPSP, ASP, and finaly the SG can be served by
> > SGP only.
> >
> > If we look at this from viewpoint of applicability of SUA procedures
> > and functionalities then it is hard to agree with your statement. I
> > can agree that the Relay is a supperset of the Endpoint (signalling
> > relay points do not have usually SCCP users, but it is rather a matter
> > of agreement). I cannot agree that SG is a supperset of the Relay,
> > since procedural behaviour of these entities is very much different.
> >
> > Regards
> >
> > Ilie
> >
> >
> > On 12/16/05, Brian F. G. Bidulock <[email protected]> wrote:
> > > Ilie,
> > >
> > > Ilie Glib wrote:                   (Fri, 16 Dec 2005 18:07:07)
> > > > Hello Folks,
> > > >
> > > > Section "3.10.9.  ASP Capabilities" of SUA RFC allows to specify the
> > > > capability of ASP/IPSP.
> > > >
> > > > Could you please clarify value 0x2 of "Signalling Gateway".
> > > > In my view this value should not be possible for IPSP nor for ASP,
> > > > thus it is never visible in SUA protocol. Why should it be defined as
> > > > possible value then?
> > >
> > > A relay can always be an SG (i.e. have an SS7 network connection).
> > > SG capabilities are a superset of a relay.  (A relay does not require
> > > an SS7 connection.)
> > >
> > > >
> > > >
> > > > Does it make sence to have an endpoint and Relay collocated in an
> > > > IPSP, then interworking field has to combine 0x3 and 0x1 values?
> > >
> > > Relay is a superset of an endpoint capability.
> > >
> > > --brian
> > >
> > > >
> > > >
> > > > Thank you in advance
> > > >
> > > > Ilie
> > > >
> > > > _______________________________________________
> > > > Sigtran mailing list
> > > > [email protected]
> > > > https://www1.ietf.org/mailman/listinfo/sigtran
> > >
> > > --
> > > Brian F. G. Bidulock
> > > [email protected]
> > > http://www.openss7.org/
> > >
>
> --
> Brian F. G. Bidulock
> [email protected]
> http://www.openss7.org/
>