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)
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Matthew S. Crocker
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Crocker Communications, Inc.
Internet Division
PO BOX 710
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http://www.crocker.com
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