Re: User Part Unavailable at ASP in M3UA

*Kuldeep,*

What if ASP is ACTIVE and unable to send the signalling UNIT to USER PART?
In such case you can't send ASP-INACTIVE message to the other end.

*Any FEEDBACK for the below paragraph.*

On receiving an *MTP-TRANSFER* request primitive from an upper layer at an
ASP the M3UA layer sends a corresponding DATA message to its M3UA peer.

Keeping the above statement in mind, we can say that there must be a way for
M3UA layer at ASP to know about the UPPER LAYER [USER PART]
availability/unavailability. When an ASP unable to send the signalling
message to the UPPER layer it will come to know about it

          UP                                  UP
            |                                      ^
            V                                     |
LM --> M3UA      or         LM <-- M3UA

When UP is unavailable other end will be made known about the
unavailability. AND
*The optional Concerned Destination parameter is only used if the SCON
message is sent from an ASP to the SGP.*


*Rgrds,
-Mahantesh*
On 12/18/06, Kuldeep Janjua <[email protected]> wrote:
>
> Yes Mahantesh,
>
> Even I too could not find its reference in RFC 4666. It will be nice if
> some body can specify it.
>
> Kuldeep
>
>
>
> On 12/18/06, Mahantesh <[email protected]> wrote:
> >
> > Sorry guys!!
> >
> > SCON has only Cause field.
> >
> > Unavailability Cause field: 16-bits
> >
> >       0 Unknown
> >       1 Unequipped Remote User
> >       2 Inaccessible Remote User
> >
> > But, why ASP-INACTIVE ?
> > No where in the RFC it is mentioned that "when UP is unavailable, send
> > INACTIVE".
> >
> >
> > *Rgrds,
> > -Mahantesh *
> >
> > On 12/18/06, Brian F. G. Bidulock <[email protected] > wrote:
> > >
> > > Mahantesh,
> > >
> > > SCON does not have an MTP3-User Identity field.  It is use to indicate
> > > so-called "nodal" congestion only.
> > >
> > > --brian
> > >
> > > Mahantesh wrote:                            (Mon, 18 Dec 2006
> > > 12:25:39)
> > > >
> > > >    Kuldeep,
> > > >
> > > >    This  might  help  you  resolve  ur  doubt...cause/user  field of
> > > SCON
> > > >    message.
> > > >    Unavailability Cause field: 16-bits
> > > >
> > > >      0 Unknown
> > > >      1 Unequipped Remote User
> > > >      2 Inaccessible Remote User
> > > >
> > > >    MTP3-User Identity field: 16-bits
> > > >
> > > >      0 to 2 Reserved
> > > >      3 SCCP
> > > >      4 TUP
> > > >      5 ISUP
> > > >      6 to 8 Reserved
> > > >      9 Broadband ISUP
> > > >      10 Satellite ISUP
> > > >      11 Reserved
> > > >
> > > >      12 AAL type 2 Signalling
> > > >      13 Bearer Independent Call Control (BICC)
> > > >      14 Gateway Control Protocol
> > > >      15 Reserved
> > > >
> > > >    Rgrds,
> > > >    -Mahantesh
> > > >
> > >
> > >
> > > --
> > > Brian F. G. Bidulock
> > > [email protected]
> > > http://www.openss7.org/
> > >
> >
> >
> >
> > --
> >
>
>


--

_______________________________________________
Sigtran mailing list
[email protected]
https://www1.ietf.org/mailman/listinfo/sigtran