Ethereal-dev: [Ethereal-dev] Patch to expose OPC/DPC from MTP3, SCCP preferences

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From: "Anders Broman" <a.broman@xxxxxxxxx>
Date: Thu, 4 Dec 2003 20:17:16 +0100

>Michael Lum wrote:

I> will add AT_SS7PC.

>

>Does anyone have any suggestions for PC formatting ?

>

>

>From the packet-mtp3.c dissector I will take the following:

>

>ANSI/CHINESE ITU x-y-z where each of x, y and z are 8 bit values.

>

>

I>TU MTP3 Q.704 does not seem to indicate a format for the PC other

>than being a 14 bit value.  However, I have seen it represented as

>a-b-c where a and c are 3 bits and b is 8 bits.

>

>

>Our engineers prefer the 14 or 24 bit decimal value as opposed to

>any formatting because then there is no ambiguity about the value.

>

>I have also seen:

>

>

>                    8.8.8                                    for 24-bit point codes

>                    3-8-3                                    for 14-bit

>

>I.e. the '.' versus '-' was supposed to indicate 24 versus 14 bit.

>

>Anybody else have input ?

>

>I have a fairly strong preference for the "8-8-8" for ANSI PC's and a similar--but less strong--preference for Chinese ITU. (In fact I'd like to, at some point, find a way for M3UA to display its point codes like this

> instead of just decimal.)

>

>I've also contemplated adding a way to display ITU PCs as 3-8-3 so it would be cool if this were available as a preference.

 

I’d prefere the ITU PC as a decimal number perhaps with the Network indicator ( NI ) in front as the point code is a plain number and this is how it’s normaly presented in the exchanges GUI:s.

e.g in a national network NI=2 it would look like PC 2-382.

 

Best regards

Anders Broman