Wireshark · Ethereal-dev: Re: [Ethereal-dev] ANSI SCCP:

[Jeff Morriss <jeff.morriss@xxxxxxxxxxx>]

Jeff Morriss wrote:

> shashidhar bhandare wrote:
>
> > Hi,
> >
> > I have a problem in the SCCP for ANSI. if the National/International 
> > indicator is set to INTERNATIONAL ( = 1 ) in the address elements, the 
> > code uses the if section of ITU. I think it should be looking at ANSI 
> > section and ignore the National/International indicator to decode 
> > properly.
> >
> > Pls comment.
>
>
> According to T1.112.3 section 3.4.1, if bit 8 of the AI is set to 0 then 
> the address is international and "both the address indicator and the 
> address are coded according to international specifications."
>
> If it is set to 1 "both the address indicator and the address are coded 
> according to national specifications."
>
> The SCCP dissector will decode the messages this way--though I have to 
> admit I have never seen (intentional) messages on an ANSI network with 
> the national bit set to 0 (international).

Of course, if you're really seeing the national indicator set to 
"international" in an ANSI network, there's no reason a preference 
couldn't be put into the SCCP dissector to make it ignore the national 
bit...