[Asterisk-biz] E1 with SS7 signaling

[Race Vanderdecken]

Ooops!

This was not suppose to go the list, sorry

Race 

-----Original Message-----
From: asterisk-biz-bounces at lists.digium.com
[mailto:asterisk-biz-bounces at lists.digium.com] On Behalf Of Race
Vanderdecken
Sent: Monday, August 01, 2005 8:09 PM
To: c.savinovich at itntelecom.com; 'Commercial and Business-Oriented
Asterisk Discussion'
Subject: RE: [Asterisk-biz] E1 with SS7 signaling

www.footnotess7.com is now open to begin the creation of SS7 that can be
used with asterisk.

Sign up and list which and what parts you would like to work on.

Race V.

-----Original Message-----
From: asterisk-biz-bounces at lists.digium.com
[mailto:asterisk-biz-bounces at lists.digium.com] On Behalf Of Christian
Savinovich
Sent: Sunday, June 12, 2005 12:06 PM
To: asterisk-biz at lists.digium.com
Subject: Re: [Asterisk-biz] E1 with SS7 signaling



 Francisco:

  Can you help me understand this :) ?.

  I am used to think one port with 24/30 channels, maybe one port doing
signaling (E1).   That's the way the Digium port will work.   How does
that differs from the SS7 port level, are they receiving the same number
of channels? Is it like channel 16 (on an E1) sends the messaging to an
out of band channel on the SS7 port, and if so, what channel is that? if
there are 30 channels on the digium port, will the SS7 port handle 30
conversations?
I keep thinking one Digium port to one SS7 port, since that's all I
need.  And finally, are all SS7 ports compatible?, or are there
"implementations"?, if so, how the heck am I going to know if what I am
paying for will work?

 Thanks a lot


On Jun 12, 2005, at 3:51 AM, Francisco A. Lozano wrote:

At 09:21 AM 6/12/2005, you wrote:
(Please correct me if I'm wrong)

SS7 is a complex stack involving many layers (MTP 1-3, SCCP,TCAP, ISUP).
I think you're talking about SSP and SCP.In SS7, one or more channels in
one or more E1s transport the signaling between a SSP(Service Switching
Point) and a SCP (Service Control Point). With only one channel between
an SCP and a SSP, an SCP can signal a huge amount of calls to the SSP.

What people usually talks about when talking about SS7 is ISUP, which is
somewhat like "EuroISDN". Then, when people here talks about "sending
calls over SS7", they really mean "sending calls over ISUP".

Brian West escribió:

It is my understanding that you DO NOT send calls over SS7 you only  
signal with it.. and a few channels on an E1 can signal many calls a  
second.

/b
---
Anakin: “You’re either with me, or you’re my enemy.”
Obi-Wan: “Only a Sith could be an absolutist.”

On Jun 12, 2005, at 3:51 AM, Francisco A. Lozano wrote:

Maybe with 24 E1s you can afford a small SSP ... SS7 licenses for  
asterisk are quite expensive!

Michael Welter escribió:


The Honduras telephone company, Hondutel, will supply E1 circuits  
with SS7 signaling only (no PRI, no R2, nothing but SS7).  The SS7  
is on a separate circuit (I assume V.35).

We would like to interface Hondutel with one or more Asterisk  
systems--we want Asterisk to be the bridge between Hondutel and  
VoIP services.  Initially we'll have one E1 for a proof of concept  
trial.  If successful the project will immediately grow to ~24 E1  
circuits.

The problem is finding an inexpensive interface with the E1/SS7  
circuit that will interoperate with Hondutel.

Does anyone have any suggestions?

Thanks,

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