[Asterisk-ss7] Let us design an open source SS7 interfaceforAsterisk

[Matthew Crocker]

I don't think it is that simple,  you need to include new protocol  
stacks in the kernel.  I think SS7 over IP (aka SIGTRAN) uses SCTP   
for MTP1 & MTP2.  You'll need to find how the 'cisco' boxes does it,  
find out which protocols it supports and then build from there.   The  
ss7box looks interesting but I don't think they have a product yet.   
The most difficult part IMHO is not developing the software, it is  
getting the software certified with the RBOCs.  The PSTN is very much  
an 'old boys network' and you need to spend a LOT of money and time  
getting products ready to integrate with the PSTN.  There are several  
SS7 to IP gateways available,  find a couple that you like and figure  
out what protocols they require.  Read up on SIGTRAN and SS7

-Matt

On May 15, 2005, at 4:47 PM, Race Vanderdecken wrote:

> Okay, there seems to be agreement as to how to do this. Doing ISUP and
> TCAP is what I have heard from others I have proposed the same  
> questions
> to in the past.
>
> Running the SS7 to PSTN interface on a "cisco" type box also has been
> recommended by others. By "cisco" I mean any certified box that is
> available to most of the VoIP guys. Having to purchase an X thousand
> dollar box is not going to work. Have any of you looked at ss7box.com?
>
> So, we need to create a SS7 socket interface to asterisk.
>
> I have built several socket interfaces in the past that have worked in
> commercial products. All were based on Stevens' Unix Programming and
> Networking books.
>
> Where do I find the socket interface on our "cisco" ss7 box?
>
> Race Vanderdecken
>
>
>
> -----Original Message-----
> From: asterisk-ss7-bounces at lists.digium.com
> [mailto:asterisk-ss7-bounces at lists.digium.com] On Behalf Of Benny
> Millares
> Sent: Thursday, May 12, 2005 4:42 PM
> To: asterisk-ss7 at lists.digium.com
> Subject: RE: [Asterisk-ss7] Let us design an open source SS7
> interfaceforAsterisk
>
>
> I think this is a very valid point.
>
> bm
>
>
> -----Original Message-----
> From: asterisk-ss7-bounces at lists.digium.com
> [mailto:asterisk-ss7-bounces at lists.digium.com] On Behalf Of Matthew
> Crocker
> Sent: Thursday, May 12, 2005 4:33 PM
> To: Andrew Edem
> Cc: asterisk-ss7 at lists.digium.com
> Subject: Re: [Asterisk-ss7] Let us design an open source SS7 interface
> forAsterisk
>
>
>>
>> My idea is to create a generic interface for asterisk to
>> access ISUP applications via sockets. The idea would be to
>> create an ISUP library similar to libPRI, but, instead of talking
>> directly over a zap device, communicate via RPC. That way it would be
>> very easy to build a middleware solution to have asterisk use Aculab
>> cards, openSS7, or something like that. And, since fundamentally,
>> asterisk is never going to use anything except ISUP, it doesn't
>> need to
>> know about MTP2/MTP3/SCCP/etc.
>>
>>
>
> I would include ISUP & TCAP.  Ideally I would rather have my SS7 A-
> links terminate in a purpose built box (ss7box, Cisco 2600 with ss7
> software).  I would want Asterisk to handle the ISUP/TCAP over IP
> (SIGTRAN ??).   I think it will be nearly impossible to get Asterisk-
> ss7 certified by an RBOC for interconnect to their network.  Without
> certification it is only good as a toy in a lab scenario.   Using an
> existing box (cisco) would make the certification process much
> easier, unnessesary.
>
> --
> 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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--
Matthew S. Crocker
Vice President
Crocker Communications, Inc.
Internet Division
PO BOX 710
Greenfield, MA 01302-0710
http://www.crocker.com