Re: Query regarding AS and SG/IPSP

Barry,

Thanks for the quick reply. One more thing:

What are the differences between figure 1 and 2? Because to me they both are the same.

1)
  -------------                                 --------------
 | SG/IPSP     |                               | AS  DPC = X  |
 | under Test  |                               |  -------     |
 | DPC = Z     |-------------------------------|--| ASP1 |    |
 |             |                               |  -------     |
  -------------                                 --------------

2)
  -------------                                 --------------
 | ASP1        |                               | SG/IPSP      |
 | under Test  |                               | DPC = Z      |
 | DPC = X     |-------------------------------|              |
 |             |                               |              |
  -------------                                 --------------

Thanks,
Moloud

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Barry Nagelberg
Sent: Wednesday, April 14, 2010 12:17 PM
To: [email protected]
Subject: Re: [Sigtran] Query regarding AS and SG/IPSP

Moloud,

You are correct. As your excerpt notes, they are conceptually the same thing. The distinction is who they talk to:

An ASP  talks to an SGP
An IPSP talks to an IPSP

Barry

-----Original Message-----
From: [email protected] [mailto:[email protected]]On Behalf Of Moloud Mousavi
Sent: Wednesday, April 14, 2010 12:05 PM
To: [email protected]
Subject: [Sigtran] Query regarding AS and SG/IPSP


Hi All,

M3UA terms in RFC confuse me:

IP Server Process (IPSP) - A process instance of an IP-based
application. An IPSP is essentially the same as an ASP, except that
it uses M3UA in a point-to-point fashion. Conceptually, an IPSP does
not use the services of a Signalling Gateway node.


What is this M3UA in a point to point fashion? In fact I took both ASP and ISPS the same concept, different names.

Thanks,
Moloud

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