[asterisk-users] Incoming calls through SS7 for datamodemtransmissions - possible??

Wed Nov 24 21:02:16 CST 2010

Thanks Cary,

The first topology we are working on should be the best way then.

Asterisk will answer SS7 calls, route them to the ISDN channels to be
terminated by the AS5300 as they were doing before. I think TDM-2-TDM
shouldn't be that much of a problem eh? No further equipment needed?

*José Pablo Méndez
           *********

2010/11/24 Cary Fitch <caryf at usawide.net>

>  I understand the problem.  You can’t resell PRI connections.
>
>
>
> I don’t think Asterisk can convert TDM to IP.  It does convert TDM to SIP
> which is then sent out over IP.    What you want to do is have it do the
> TDM/Modem conversion without the PRIs and Cisco Gear.
>
>
>
> There used to be a way to do this, and maybe still is but not just with
> Asterisk perhaps.
>
>
>
> I know that Ascend/Lucent TNTs (and I am sure some other equipment)  could
> take TDM trunks, which could be SS7 trunks, and convert them to IP.
>
>
>
> The point in this is that they are SS7 based.  You can take SS7 trunks from
> either the Asterisk box or direct from the Telco and convert them to IP.
>
>
>
> NO PRIs involved.  Yes, more “telco grade carrier equipment” but no PRIs.
>
>
>
> A lot of this equipment was available by the pound a few years back.
>
>
>
> Cary
>
>
>  ------------------------------
>
> *From:* José Pablo Méndez Soto [mailto:auxcri at gmail.com]
> *Sent:* Wednesday, November 24, 2010 8:34 PM
> *To:* Asterisk Users Mailing List - Non-Commercial Discussion
> *Cc:* caryf at usawide.net
> *Subject:* Re: [asterisk-users] Incoming calls through SS7 for
> datamodemtransmissions - possible??
>
>
>
> Thanks Cary,
>
> What happens is, the Telco won't allow the small company to resell the ISDN
> connections, meaning, they bought the trunks and DIDs, then sold dialing
> plans to route incoming calls through the PRIs out the Internet. This is not
> the issue though. We definitely have to migrate to an SS7 capable platform,
> because that is the only way the Telco allows them to resell the dial-up
> connections (not ISDN), and Asterisk is the current bet.
>
> If we can get Asterisk to pick up those calls via SS7, then authenticate
> them, send them out to the Internet, we would be achieving a %100 usage on
> the Digium cards, because one of them wouldn't be used to talk to the AS.
>
> Can Asterisk do this?
>
>
> Thanks again,
>
> *José Pablo Méndez**
>            *
>
>  On Wed, Nov 24, 2010 at 7:59 PM, Cary Fitch <caryf at usawide.net> wrote:
>
> I am not sure where you are and what legal conventions are involved.
>
>
>
> Are you saying the Telco (and legal restrictions) say you can’t send calls
> to the internet via the AS5300 but you can if Asterisk does it directly?
> What is the “logic” in that?
>
>
>
> Or are they saying your Telco to Asterisk trunks have to be SS7 controlled?
>
>
>
>
> Or are you concerned about Asterisk handling the TDM to IP conversion in an
> adequate manner?
>
>
>
> I am not sure/aware myself that Asterisk will do a modem to IP conversion.
> I think in your example the AS5300 is doing that.
>
>
>
> What is the Telco’s problem in doing what the customer was doing before?
>
>
>
> Feel free to correspond directly if you want to.
>
>
>
> Cary Fitch
>
>
>  ------------------------------
>
> *From:* asterisk-users-bounces at lists.digium.com [mailto:
> asterisk-users-bounces at lists.digium.com] *On Behalf Of *José Pablo Méndez
> Soto
> *Sent:* Wednesday, November 24, 2010 7:31 PM
> *To:* asterisk-users at lists.digium.com
> *Subject:* [asterisk-users] Incoming calls through SS7 for data
> modemtransmissions - possible??
>
>
>
> Hello,
>
> We are working on implementing a solution for a medium service provider.
> They were previously using a Cisco AS5300 gateway with some PRI trunks to
> receive modem calls, then route them out the Internet.
>
> The Telco they were buying the trunks to discovered this configuration and
> restricted them due to legal conventions, and stated that in order to
> continue doing this, they would have to talk SS7 directly.
>
> We are planning on solving this by placing an Asterisk server with some
> TE410 cards talking SS7 to Telco, and another 4 ISDN ports talking to the
> AS5300 for the dial-up to complete after authenticating against a RADIUS
> server.
>
> My questions is: can we use only Asterisk to complete/terminate the dial-up
> connection, removing the AS5300 out of the picture?
>
> Current topology to be set-up:
> Telco --> SS7 --> TE410P-AsteriskServer --> ISDN --> AS5300 --> Internet
>
> Ideal topology:
> Telco --> SS7 --> TE410P-AsteriskServer --> Internet
>
>
> Some posts talk about zapRAS being able to accomplish this, not quite sure
> though
>
> Sounds like possible:
> http://lists.digium.com/pipermail/asterisk-users/2004-January/026956.html<asterisk-users@lists.digium.com>
>
> Sounds like not possible:
> http://lists.digium.com/pipermail/asterisk-users/2009-November/240202.html
>
>
> Thanks in advance,
>
>
> *José Pablo Méndez**
>           *
>
>
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