FW: MEGACO errata
Chip Sharp
chsharp at CISCO.COM
Fri May 26 16:40:49 EDT 2000
In your email "Changes made in Geneva" is the following cryptic statement:
...snip...
>Annex A.2
> -- comment sets initial version to 1
> -- mtpAddress size corrected
...snip...
I don't remember what this meant and I don't remember much of Geneva, but I
seem to remember this issue coming up somewhere. Hopefully this will give
you a pointer to start with.
Chip
At 03:08 PM 5/26/00 -0500, Tom-PT Taylor wrote:
>I'm forwarding this to the SG 16 list copy the Megaco list because I think
>the MTP address was firmed up at Red Bank. Can anyone account for the
>failure to accommodate longer MTP addresses? Was it simply because the
>intention was to use Annex I transport within an ITU environment only?
>-----Original Message----- From: dacollins at notes.primeco.com
>[SMTP:dacollins at notes.primeco.com] Sent: Friday, May 26, 2000 1:03
>PM To: Taylor, Tom-PT [NORSE:B901:EXCH] Subject: MEGACO errata
>
>
>
>Hi Tom, Having had a look at the latest version of the MEGACO spec, I
>noticed something odd. The mId may be an MTP address. However, the MTP
>address is defined in both the ABNF and ASN.1 specifications as being 2
>octets in length. The ASN.1 description provides a comment that the point
>code (PC) is 14 bits and the network indicator (NI) is two bits. This is
>only correct for the ITU version of SS7. In several countries, different
>versions of SS7 are used and different addressing schemes are used. In
>many countries, including the US, Canada and China, the PC is 24 bits
>long, with the NI still at two bits, for a total of 26 bits. Therefore,
>to use an MTP address for the mId in those countries, the definition of
>the mId needs to change.
>
>I hope this helps in finalizing the spec.
>
>Daniel Collins
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Chip Sharp CTO Consulting Engineering
Cisco Systems
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