Re: SS7 UPU FROM ASP
"emmanuel mavrommatis" <[email protected]>
| Newsgroups | gmane.ietf.sigtran |
|---|---|
| Message-ID | <[email protected]> |
Brian/Barry, Thanks both for your input. I see your point. Best Regards, Emmanuel On 5/31/07, Brian F. G. Bidulock <[email protected]> wrote: > > Emmanuel, > > At the ASP, M3UA is envisioned by the RFC as presenting an MTP to MTP-User > service primitive interface an MTP-User. As Barry notes, how availability > of the MTP user is detected across the MTP/MTP-User interface is > implementation dependent for SS7 MTP (see Q.701 for example). As such, > this > must be an implementation dependent mechanism. > > For example, if the MTP/MTP-User interface is implemented as pseudo-device > driver and service primitives passed using, say, getpmsg(2) and putpmsg(2) > system calls, unavalability of the local MTP-User might be signalled > across > the interface by closing the file description associated with the pseudo- > device driver. Of couse, other representations and implementations are > possible. > > So if closing a file descriptor signals the unavaibility of an equipped > MTP > User, the M3UA implementation should deactivate for the associated AS. At > the SGP, the SGP is responsible for determining if the entire AS is > unavailable and, if so, should generated UPU messages toward originators > sending messags to the unavailable User Part. > > Sending a UPU message directly from the ASP would consists of packaging a > normal SS7 UPU message in an M3UA DATA message and sending it to the SGP. > However, beware that the ASP needs to known the availability of all ASPs > for > the AS with all SGP, and that some NIF at the SG might reject the message > out > of hand. > > It is better and fully in fitting with th RFC to indicate unavailability > to > the SGP, only using ASPTM. > > > --brian > > > emmanuel mavrommatis wrote: (Thu, 31 May 2007 18:38:43) > > > > Hi Barry, > > Thanks for the responce. > > I understand that ASP at the AS does not have MTP3 layer (just > M3UA). > > As so when you say M3UA implementation-dependent primitive to the > MTP3 > > layer, do you mean a M3UA implementation-dependent message to the > MTP3 > > layer at the SG? > > Thanks, > > Emmanuel > > > > > -- > Brian F. G. Bidulock > [email protected] > http://www.openss7.org/ > _______________________________________________ Sigtran mailing list [email protected] https://www1.ietf.org/mailman/listinfo/sigtran