Re: ASP Capabilities value 0x2 of interworking field

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/