[Asterisk-Users] Newby question. Basic structure

[Rich Adamson]

My response is inline...

> Hi! and thanks a million for your answer. You hace cleared many of the 
> doubts I had, including the differences between the cards. At the same 
> time, new questions has arised:
> 
> Is there a possible configuration in case I dont have a broadband 
> connection in the called-end, for example, a modem connection?

No, there is no modem support built into asterisk. The problem is that
modems typcially do not support the bandwidth needed for a single
phone call. About the minimum bandwidth needed (including IP overhead)
is roughly 30,000 bits/second full duplex.
 
> Is it possible to set a route for the IP packages? This is to optimize 
> the packets transmission over internet.

I'm not sure what you mean with the above question. The voip packets
will typically be standard old UDP packets, and those packets are routed
over the Internet like any other IP packet based on whatever the ISP's
have elected to do. You don't have any choice on how those are routed 
in any case.
 
> I'm outside US, so, why should I use tdm instead of x100p?

The chip set on the x100p was designed specifically to match the US
telco standards. The card will work in some countries, but other
countries you'll hear a lot of echo, callerid may not work, etc, etc.
The TDM card has a much newer chip set that was intended to be used
in many different countries around the world. Therefore, stay with
the TDM (as opposed to the x100p).

Rich
 --------------------------------
> Thanks again,
> 
> RODOLFO
> 
> Rich Adamson wrote:
> 
> >>From: Rodolfo Grave <rodolfograve at yahoo.es>
> >>
> >>I've being reading posts from the list since yesterday and I feel this 
> >>question was answered a lot time ago, but the list archives are a mess 
> >>(yet). I hope some one is willing to help me out.
> >>
> >>I want to set up this:
> >>
> >>caller ----- PSTN ---- (SOMETHING1) ------ VoIP --------- (SOMETHING2) 
> >>---- PSTN
> >>
> >>I think this must be a very basic architecture, but I'm not sure wat 
> >>SOMETHING1 and SOMETHING2 are. I've been on this for a while now (around 
> >>two months) and till yesterday I haven't find Asterisk.
> >>
> >>Can you help me? I need to know hardware and software needs for this. I 
> >>have read a few about voIP and have some programming and configuration 
> >>skills under Linux and Windows.
> >>    
> >>
> >
> >In terms of using asterisk to implement your diagram, "something1" and
> >"something2" are basic linux boxes equipped with:
> > - pstn interface card (such as x100p, tdm, isdn, T1 card)
> > - ethernet interface (to connect to your broadband internet)
> > - asterisk software
> >
> >The type of pstn interface card to use will be dependent upon how
> >many "simultanous" phone conversations you'd like to support. The
> >x100p card is a single pstn line interface; the tdm card supports
> >one to four (tdm04b bundle) pstn lines (the tdm card needs to be
> >purchased with fxo interface modules); the isdn card supports from
> >one to 23 (?) pstn logical interfaces (depending upon the exact
> >card purchased); or the T1/E1 card supports from 1 to 24 (T1) or
> >1 to 32 (E1-?) conversations. You'll find most of those cards at
> >www.digium.com under Hardware Products.
> >
> >If you are outside the US, consider the TDM card as opposed to
> >the x100p card.
> >
> >The size of Linux system will also be dependent on how many 
> >simultanous calls you want to support, and exactly how you have
> >the system configured. For a single call, some folks have it
> >running on old 300 mhz (and slower) box, while high traffic
> >volumes will require a much faster system.
> >
> >The asterisk software can be found on the digium home page 
> >(lower-left menu option), which points to www.asterisk.org
> >
> >Also, lots of good reference material at www.voip-info.org
> >
> >After you've configured your system with your favorite Linux
> >distro, download and compile asterisk per the instructions found
> >on the www.asterisk.org site. Pay attention to the last steps
> >on your screen that copies configuration samples to /etc/asterisk.
> >Read through those configuration files, read the info at
> >www.voip-info.org, and you should be able to get a system
> >running.
> >
> >
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> 
> 
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