[Asterisk-ss7] My Take on the SS7

[Domjan Attila]

In Hungary not needed certification, only pass the ss7 tests (t-com).

On Fri, 2005-08-26 at 13:02 -0400, Matthew Crocker wrote:
> Not sure why I hit send on that last one but to add...
> 
> 
> You need SS7 to interconnect with the PSTN if you are a telephone  
> company.  You don't need SS7 if you are a customer.  The PSTN here in  
> the states is governed by a set of standard put forth by ANSI and  
> published by Telcordia.  Your SS7 stack needs to be certified to work  
> with the PSTN before you will be allows to inter connect.  I don't  
> think any ILEC will allow an open source software package on their  
> SS7 network.   If you plan on connecting SS7 to the PSTN you would be  
> considered a 'switch' not a 'pbx' and your 'switch' must also support  
> CALEA and E911 amongst other things.
> 
> I  purchased a Tekelec t7000 switch to handle my SS7,CALEA,E911,...  
> and VoIP codec stuff which will dump SIP/g.711 to an internal  
> Asterisk feature server.  Verizon (my ILEC here) will only see SS7  
> from me originating from the Tekelec switch.
> 
> IMHO, Asterisk doesn't need a full SS7 stack. It needs to work with  
> certain SS7 gateways which already run certified SS7 stacks and  
> convert it to SIGTRAN (SS7 over IP).  Asterisk with a Ethernet card,  
> SIGTRAN, ISUP, LNP, LIDB would be good but I don't know if it would  
> ever be good enough to act as a telco switch.
> 
> For me, hanging a SIP only Asterisk off my switch as a SIP/VoIP  
> feature server will give me all the capabilities I would need.
> 
> -Matt
> 
> On Aug 26, 2005, at 12:45 PM, Richard Gintz wrote:
> 
> > Can someone give me an example of the cost/feature differences  
> > between SS& and
> > PRI ISDN?  I just got a PRI line in from XO Communications  
> > (Texas).  And how
> > much differently would Asterisk configurations be using SS7 vs. PRI?
> >
> > Thanks
> >
> >
> >>
> >>
> >>> To me the reason I'd really like SS7 over PRI ISDN is that I would
> >>> really like to get the CPC data on incoming calls which PRI
> >>> ISDN cannot
> >>> do and thats it in total.
> >>>
> >>
> >> I am not sure what _I_ would do with the CPC information in my  
> >> case.  It may
> >> be good to know where the call came from so that I can setup more  
> >> cost
> >> effective route in the future but Caller ID (number) seems good  
> >> enough to
> >> start. So simply converting the SS7 message to a PRI should be  
> >> good enough.
> >> If I can pass the caller ID information down to the Voip  
> >> Subscribers that
> >> would be the only reason I need it.
> >> What do _you_ use the CPC information for?
> >>
> >>
> >>> I think not many people need SS7 - maybe its not big/available in  
> >>> the
> >>> US?  Also normal businesses will get by fine with PRI ISDN
> >>> (they don't  want/need the CPC switch data).
> >>>
> >>
> >> It is the primary way to interconnect to the ILEC (at least Qwest  
> >> in the
> >> Northwest).  The cost of lines controlled by SS7 is only a  
> >> fraction of PRIs
> >> from Qwest or other providers.
> >>
> >>
> >>> Markku Korpi's driver is not cheap for sure
> >>>
> >>
> >> Yes but it is certainly less money than most hardware solutions I  
> >> have seen
> >> out there. (Markku hasn't gotten back to me yet from my first  
> >> email to him
> >> so I am not even sure whether I will be able to get it if I want it)
> >>
> >>
> >>> Best of luck!  When you are finished I you might want lots of
> >>> money for
> >>> your non-opensource SS7 software too! :)
> >>>
> >>
> >> I am not a greedy person but of course I wouldn't mind lots of  
> >> money (That
> >> is why I am in business).  Asterisk has helped us a ton and at  
> >> very little
> >> cost.  We might be able to give back depending on what it will end up
> >> costing.  There is always a consulting / support income  
> >> possibility even if
> >> it is open sourced.  (I don't want to talk like it is done before  
> >> I even
> >> start though)
> >>
> >>
> >>
> >> _______________________________________________
> >> Asterisk-SS7 mailing list
> >> Asterisk-SS7 at lists.digium.com
> >> http://lists.digium.com/mailman/listinfo/asterisk-ss7
> >>
> >>
> >
> >
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> 
> --
> Matthew S. Crocker
> Vice President
> Crocker Communications, Inc.
> Internet Division
> PO BOX 710
> Greenfield, MA 01302-0710
> http://www.crocker.com
> 
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-- 
Domjan Attila <adomjan at tvnet.hu>