[Asterisk-Dev] SS7 for *

[Linus Surguy]

>> Certainly in the UK, you cannot connect to British Telecom with SS#7 
>> unless you are operating an approved switch, i.e. an approved software 
>> build & hardware build - and we've been through this process.
>>
>> Mind you, as * today is concerned then it is not important anyway, as BT 
>> only allow BT-IUP or UK-ISUP SS#7 and not ETSI-ISUP.
>
> Why does that make it unimportant. SS7 in the UK has only minor 
> differences, which could be allowed for. Of course, that means a special 
> UK approval, and EU approval won't work for the UK.

UK-ISUP has more than minor differences from the ETSI brand of ISUP (it is 
effectively a BT version). ETSI-ISUP in use in the UK (both version 1 & 2) 
are identical and the EU approval version would be fine for the UK.

> Don't other operators in the UK use the standard SS7 protocol? I thought 
> it was just BT that would not fall into line. I haven't worked there for 
> 12 years.

Most will happily support ETSI-ISUP, and for interconnection purposes, the 
earlier V1 tends to get used more (in our experience), although some of the 
larger carriers seem to be suggesting that they might drop it, so they only 
have to support UK-ISUP & BT-IUP

Linus