RE: ASP Active

Shashank,

> -----Original Message-----
> From: [email protected] [mailto:[email protected]]On
> Behalf Of Prasad, Shashank S (Shashank)
> Sent: Thursday, December 22, 2005 2:34 PM
> To: [email protected]
> Subject: [Sigtran] ASP Active
>
>
> I had a question related to ASP Active message and the definition of AS:
>
> The section 3.7.1 says:
>
>    The ASP Active message is sent by an ASP to indicate to a remote M3UA
>    peer that it is ready to process signalling traffic for a particular
>    Application Server.
>
>
> And I read from the specs, that an Application Server can be a a virtual
> switch element handling all call processing for a unique range of PSTN
> trunks, identified by an SS7 SIO/DPC/OPC/CIC_range.  Another example is a
> virtual database element, handling all HLR transactions for a
> particular SS7
> DPC/OPC/SCCP_SSN combination.
>
> In this context, here is the question:
> Let's assume that we have the following stacks at the both the ends.
>
>
>          ********    IP    ********
>          *IPSP-A*          *IPSP-B*
>          ********          ********
>
>          +------+          +------+
>          |SCCP- |          |SCCP- |
>          | User |          | User |
>          +------+          +------+
>          | SCCP |          | SCCP |
>          +------+          +------+
>          | M3UA |          | M3UA |
>          +------+          +------+
>          | SCTP |          | SCTP |
>          +------+          +------+
>          |  IP  |          |  IP  |
>          +------+          +------+
>              |________________|
>
>
>
> When the IPSP-A sends an ASP Active to IPSP-B, does it mean that the SCCP
> ONLY (at Node A) is ready for receiving signaling traffic or even the
> SCCP-User/Application (at Node A) is ready for Signaling traffic.
>
> I believe that ASP Active was sent to receive the SCCP (at Node A) traffic
> from NodeB. However, there can be a scenario wherein, at the same
> time, the
> SCCP-User (at Node A) is NOT ready to send and receive traffic from NodeB.
[TOLGA]For practical purposes, I would say that ASPAC declares readines of
the application, i.e. SCCP-User in your example. OTOH, I would think from
M3UA point of view, it wouldn't matter whichever interpretation you pick but
receiving messages with no application to process them is probably not very
useful.
>
> Let me know if this interpretation is fine.
>
> shashank
>
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