Re: M3UA restrictions

 
The thing to remember is that M3UA carries the MTP3 service interface.
So if there is a user-part (eg ISUP or SCCP) at one end then there is an
MTP3 at the other.  The M3UA SG (effecively) just feeds traffic into MTP3.

	David

> -----Original Message-----
> From: [email protected] 
> [mailto:[email protected]] On Behalf Of [email protected]
> Sent: 04 July 2008 07:51
> To: [email protected]
> Cc: [email protected]
> Subject: Re: [Sigtran] M3UA restrictions
> 
> Hello, Brian,
> 
> Yes, I read this comment about MTP management. But I think 
> there is misunderstanding.
> ASP sends TRANSFER message (payload data) with DPC which 
> doesn't belong to SG. In traditional SS7 an STP must route 
> such message to output link set without checking of 
> parameter, e.g. SI. So, why in M3UA SG don't have to work similarly?
> 
> BR, Sergey
> -----Original Message-----
> From: Brian F. G. Bidulock [mailto:[email protected]] 
> Sent: Thursday, July 03, 2008 10:31 AM
> To: Смирнов Сергей
> Cc: [email protected]
> Subject: Re: [Sigtran] M3UA restrictions
> 
> smirnov.s,
> 
> SI 0 or 1 are not valid MTP User Parts and do not have
> to be supported by an SG.  Various error response are
> available.  AFAIK no proscribed error or procedure is
> specified for dealing with these messages as different
> from any other erroneously coded message.
> 
> Reference RFC 4666 p. 53 "Service Indicators",
> 
>   "... The absence of the SI parameter in the Routing
>    Key indicates the use of any SI value, excluding of
>    course MTP management. ..."
> 
> --brian
> 
> [email protected] wrote:                (Thu, 03 Jul 2008 10:09:12)
> > Hi, Brian,
> > 
> > Excuse me I have to specify my question. Can SI (service 
> indicator) be
> > 0 or 1 (management subsystems)?
> > 
> > Br,
> > Smirnov Sergey
> > NW MegaFon, Russia
> 
> -- 
> Brian F. G. Bidulock
> [email protected]
> http://www.openss7.org/
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