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: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Benny Millares Sent: Thursday, May 12, 2005 4:42 PM To: [email protected] Subject: RE: [Asterisk-ss7] Let us design an open source SS7 interfaceforAsterisk
I think this is a very valid point.
bm
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Matthew Crocker Sent: Thursday, May 12, 2005 4:33 PM To: Andrew Edem Cc: [email protected] 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
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