[asterisk-users] [asterisk-ss7] Incoming calls through SS7 for data modem transmissions - possible??

[José Pablo Méndez Soto]

Thank you Horacio and Cary.

We will try receiving SS7, routing via SIP, answering on the AS5300, then
looping back to itself (out PRI, in PRI ports) in order to invoke the modem
termination. This way we may be able to spare the TDM cards in Asterisk and
reuse the E1 ports installed in the gateway.

Best regards,

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


2010/11/24 Horacio J. Peña <horape at compendium.com.ar>

> Hola!
>
> ZapRAS seems to work only with ISDN calls. "This command is not for use
> with
> analog lines; it does not provide a modem emulator."
> (http://www.voip-info.org/wiki/view/Asterisk+cmd+ZapRAS)
>
> You need something doing the modulation. It seems that iaxmodem is your
> best
> bet, and you'll have to make a good bunch of work on it to be able to use
> as you
> want to.
>
> If your client has the cisco gateways, I'd suggest you to keep them. They
> are
> very reliable and tested, and with MICA cards they have not a high resale
> value,
> so you'll probably end with them as paperweights unless you happen to have
> some
> stack of C549 cards to repurpose them.
>
> Saludos,
> H
>
> On Wed, Nov 24, 2010 at 07:58:37PM -0600, José Pablo Méndez Soto wrote:
> >    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 from, 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? We would
> >    probably need a PPP channel configuration to link the modem connection
> >    with the Internet.
> >    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:
> >    [1]
> http://lists.digium.com/pipermail/asterisk-users/2004-January/026956
> >    .html
> >    [2]
> http://lists.digium.com/pipermail/asterisk-users/2009-November/24021
> >    8.html
> >    Sounds like not possible:
> >    [3]
> http://lists.digium.com/pipermail/asterisk-users/2009-November/24020
> >    2.html
> >    Thanks in advance,
> >    José Pablo Méndez
> >
> > References
> >
> >    1. mailto:asterisk-users at lists.digium.com
> >    2.
> http://lists.digium.com/pipermail/asterisk-users/2009-November/240218.html
> >    3.
> http://lists.digium.com/pipermail/asterisk-users/2009-November/240202.html
>
> > --
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>
> --
> Horacio J. Peña
> horape at compendium.com.ar
> horape at uninet.edu
>
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