[Asterisk-Users] Who would use Asterisk SS7?

[Mike M]

On Saturday 24 May 2003 09:18, Thilo Salmon wrote:
> On Sat, 2003-05-24 at 08:47, Mike M wrote:
> > My question is targeted to * users that have, or are considering getting,
> > the competitive operator status.  Would more facilities based competitors
> > exist in the market if the cost of equipment were drastisically reduced? 
> > Would SS7 on * be useful from a commercial standpoint to a user?
>
> Speaking for myself I can only answer you with a 'yes, very much so'.
> Being grown up around IP networks I find it increasingly difficult to
> design communication services without adding voice-capabilities.
>
> At least in Germany (and I assume this is true for most countries with
> recently opened telecommunication markets) it makes economic sense to
> interconnect with the incumbent telco. This is almost certainly true
> once your network has reached a certain size.
>
> I see two issues which need to be solved before asterisk SS7 comes to
> live in actual networks:
>
> Afaik SS7 does carry way more information then what is exposed to the *
> user. I have a feeling that quite some functionality would need to be
> added before SS7 becomes usable. E.g. providing a restricted calling
> party number to an ISP or law-enforcement customer might be a
> requirement while this would be illegal to do for ordinary customers. In
> another case you might want to provide some information to the user such
> as 'this number is not in use' without "picking up" (and imposing
> charges to the calling party).

I think these features are implemented in call-processing logic behind the 
ISUP interface.  The ISUP IAM would be altered as required for 
law-enforcement agencies (config option possibly). The second fefature sounds 
like a Release Cause field value that is filled conditionally in c-p. 
>
> The other issue is a legal one. In order to connect to the incumbent
> telco your equipment has to be certified. I believe unless quite a few
> of us get together, this one might be a real problem.

Certification can be a long and steep hill to climb.  Sometimes it is 
overcome through a tiered approach: The incumbent (DT for example) calls the 
shots.  The 2nd tier competitive operator meets DT's interconnection 
requirements.  The 2nd tier operator offers network connection to the 3rd 
tier competitors with loosened requirements.  Certification can also be a 
fairly easy hurdle to cross in some markets.   Certification in one market 
can carry over to another too.  Getting as much information as possible on 
network certification is a key to assessing if a * ss7 interface can be used 
in a particular market.  
>
> Thilo
>
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-- 
Mike M.