[Asterisk-ss7] My Take on the SS7

[Lubomir Christov]

In Bulgaria you need certification ... :)

Domjan Attila wrote:

>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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>>    
>>