Re: [asterisk-users] Question about SS7

2008-05-15 Thread Dinesh Nair
On Wed, 14 May 2008 17:06:54 -0400, Alexander Lopez wrote:

 SS7 helps carriers maximize the use of the circuits that interconnect
 them with others. Instead of using a channel and having it open for 30
 seconds as the call is setup, user gets signaling (busy, ringing, not in
 service), and call is torn down. It can  get the result in a split
 second with out using any of my channels, all out of band and digital
 rather than analog, (see 2600 signaling)

simplistically, ss7 is like sip which sets up the call, and the circuit
itself is the rtp streams which are then built when the call is connected.
likewise, you can have the sip exchange go through one path/route and rtp
through another. 

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[asterisk-users] Question about SS7

2008-05-14 Thread mark morreny
Hi,

I have read about SS7 recently and learnt that it is a signalling protocol
used in PSTN for call management, setup, etc.  The thing that I don't
understand is how SS7 plays a role in VOIP.  When I make calls between
landline and Asterisk via PSTN, I don't need to do anything with SS7.  Is it
because the SS7 signalling is already done by Asterisk already?  From the
prespective of implementing Asterisk, what kind of SS7 support is needed?
Is SS7 something needs to be concerned about when using Asterisk with T1/E1?

I hope someone can help me to clearify these doubts that I am having.

Thanks,
Mark
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Re: [asterisk-users] Question about SS7

2008-05-14 Thread Alexander Lopez
SS7 does NOT play a roll in VoIP. The SS7 signaling that you are
describing is not really SS7 but signaling over a PRI using ISDN that
your provider uses to exchange information via SS7 to the other
carriers. 

 

To be blunt and I do not mean to be condescending in any way, but, if
you are using Asterisk and do not know what SS7 is, you don't need to
worry about it.

 



From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of mark
morreny
Sent: Wednesday, May 14, 2008 3:52 PM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: [asterisk-users] Question about SS7

 

Hi,

 

I have read about SS7 recently and learnt that it is a signalling
protocol used in PSTN for call management, setup, etc.  The thing that I
don't understand is how SS7 plays a role in VOIP.  When I make calls
between landline and Asterisk via PSTN, I don't need to do anything with
SS7.  Is it because the SS7 signalling is already done by Asterisk
already?  From the prespective of implementing Asterisk, what kind of
SS7 support is needed?  Is SS7 something needs to be concerned about
when using Asterisk with T1/E1?

 

I hope someone can help me to clearify these doubts that I am having.

 

Thanks,

Mark

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