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@notes.primeco.com [SMTP:dacollins@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
G'Day Tom,
When doing the definition of it was intended to support the ITU variant. There wasn't any input to support anything else at the time.
Cheers, Christian
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@notes.primeco.com [SMTP:dacollins@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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Christian Groves -
Tom-PT Taylor