[Asterisk-Users] SS7 signaling/Softswitch

[Asterisk online forums]

OpenSS7 project mentions Asterisk also. I think project will bring something
what we all really need - SS7 support for Asterisk
Take a look : www.openss7.org


Regards,
Alexander

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----- Original Message ----- 
From: "Ray Burkholder" <ray at oneunified.net>
To: <asterisk-users at lists.digium.com>
Sent: Monday, October 27, 2003 8:01 PM
Subject: RE: [Asterisk-Users] SS7 signaling/Softswitch


>
> You are correct in regards to what SS7 is and does,

I thought it would be helpful to bring other users on the list up to speed.
;-)

Some additional SS7/VoIP integration info from a 3Com perspective can be
found at:
http://www.c7.com/ss7/whitepapers/3com_ss7_intelli.pdf

>
> What I was inquiring about was Gus' comment about a PRI
> treated as "route" on a 5E.

I'll have to defer to Gus for an answer on that one.

>
> I'm also trying to find out what types of SS7/AIN features
> may be available over
> a PRI D channel.  For instance, message waiting indication
> (MWI) signals are
> sent interoffice over SS7.  Could one formulate a packet
> that's sent over a PRI
> D channel that would end up in a remote switch via SS7?
>

The MWI you mention is probably part of CLASS services, and is probably a
function of AIN on an SS7 SCP (Service Control Point), to which a Telco's
switch is connected.

For some light reading on AIN, SCP, TPAN and related bits, this page has
some interesting info:
http://www.ulticom.com/html/products/ss7/ain.asp

It doesn't directly answer your question, but I would guess that the Class 5
switch has to make some sort of translation between what happens in the D
channel on a PRI and what it needs to communicate over its backend SS7
network.  I see two proper solutions:  a) implement SS7 directly so you have
access to the signaling network for your application, or b) just handle the
communications over the ip network in a converged network scenario.  By the
way, why do you ask the question of the D channel message?  What is your
application?

So, the proper answer is that if you really want to implement this PRI - SS7
- PRI message, you should really be talking to your nearest CO Engineer or
Telco Enterprise Business Office where they handle this all the time for
enterprise call center applications.

On the other hand, maybe Gus could contribute a regular tutorial on how he's
got various things interconnected.  The more the info, the better.  Gus once
asked if we want the plethora of info he can provide.  I vote yes.


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