Subject: RE: [Sigtran] SI in data message

From: "Schantz, John" <[email-masked]>
Date: Tue, 4 Mar 2003 16:15:17 -0600

This is not the response I expected to see.

The SI (part of the SIO) tells you "who" the MTP3 user is.  Some of the
users are: ISUP, SCCP, etc.  Note, these are protocols and tell you how
to decode the data part of the message.

If your system only supported 1 and only MTP3 user type (1 user
protocol) then you would not need it.  But if your system supported
multiple MTP3 users, you would need to look at the SI to be able to at
least understand how to decoding of the message.  Of course, now back to
Brian, if you made the SI part of your RK and you used the RK to hand
messages to your application, you would be set.  But there are many of
us that don't explicitly use RK and continue to use the standard MTP
parameters.

John

-----Original Message-----
From: Brian F. G. Bidulock [mailto:[email-masked]] 
Sent: Tuesday, March 04, 2003 2:41 PM
To: bijoy
Cc: [email-masked]
Subject: Re: [Sigtran] SI in data message

bijoy,

Implementations that use RK's based on NA and do not include RC in DATA
need the RL to further discriminate the message at the AS.

--brian

bijoy wrote:
(Tue, 04 Mar 2003 19:45:17)
> 
>    hi all,
> 
>      In section 3.3.1
> 
>      The protocol data parameter contains  SIO and routing label(RL).
> 
>       If the routing context can by itself determine the user part(AS)
> 
>      what is the necessity of RL + SI ,the only reason i think will be
> 
>      for the basic fact that MTP3 User generates MSU(message signal
> 
>      units) which contains the RL and SIO.
> 
>          Who does the message distribution functionality of MTP3?
> 
>      message distribution is done by MTP3 based on SI which now
> 
>      has been handed over to   M3UA.
> 
>           Is  it  possible  that  an  AS  comprises of MTP3 users and
the
>    routing
> 
>      key CAN be only DPC, hence M3UA at SGP routes the message
> 
>       based  on  DPC  to  the  ASP  and  M3UA at ASP accomplishes
message
>    distribution
> 
>      with the help of SI in protocol data parameter???
> 
>      somebody enlighten ....
> 
> 
> 
>    thanks
> 
>     sibi/bijoy

-- 
Brian F. G. Bidulock
[email-masked]
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