[asterisk-users] Asterisk "Clusters"

[Rob Lith]

For multiple TE4XXP cards you strap them with
http://www.digium.com/en/wheretobuy/digiumdirect/productview.php?product_code=ACCTIM01
to prevent corruption due to timing slips on the second, third or fourth
TE4XXP card.

The link above shows four cards linked.

We tested up to three quad PRI cards in a Dual Xeons and comfortably run 2
in a system.

You can just get Asterisk to generate the calls and on the inbound systems
play music on hold or something.

Regards
Rob

On 08/09/06, Koen Van Impe <koenvi at gmail.com> wrote:
>
> Sounds like a nice setup you have in mind.
> All I can tell is that you might have trouble with clocking on your PRI's
> if you use multiple cards in one system.
> I've read about it somewhere, but can't find the source. Have a look at
> the wiki.
> Syncing clocks on one card happens on the card level. But of you have
> multiple cards, there might be some slip.
>
> Good luck!
>
> On 9/7/06, Mitch Thompson <mitchthompson at satx.rr.com> wrote:
> >
> > Hello, All.
> >
> > I've been lurking on this list for some time, trying to drink from the
> > fire hose. Now, I have a few questions. First, though, here is the
> > background:
> >
> > I work for a testing facility where we test telephony products. We have
> > been using Asterisk for about 4 months now as a test bed for various
> > things. Now, our test engineers want to ramp things up a bit.
> >
> > Essentially, the system under test has the capability of using up to 8
> > T-1 ISDN/PRI lines. The engineers want to build two Asterisk "clusters",
> > each with 20 ISDN/PRIs. Of these, 12 would be "Inbound" PRIs, and the
> > other 8 would be "Outbound". The system under test would be connected to
> > 8 of the Inbound lines, and a Call generator, such as an Ameritec
> > Crescendo, would be connected to the other 4 Inbounds. These twelve
> > lines would dial through the Asterisk, through the 8 Outbound lines to
> > the other Asterisk, which would terminate the 8 PRIs into 12 PRIs worth
> > of Crescendo or Fortissimo.
> >
> > The whole purpose of this mess is to determine how the system under test
> >
> > responds to network congestion, since it is competing with the Crescendo
> > for the 8 Outbound PRIs.
> >
> > So, I guess my questions are:
> >
> > 1) Is Asterisk's congestion capabilities robust enough to do what we
> > want?
> > 2) I have the resources to build this cluster one of two ways:
> > a) I have 4 Dell PowerEdge SC1600's, with 3.0 GHz Dual Xeons (looks like
> > 4 processors to the system), 2 GB of RAM, and 6 slots (2xPCI, 2X PCI-X,
> > 2X PCI-Express). I would use these and put 5 Digium cards in each for
> > the two Asterisk clusters.
> > b) I also have 12 1U rackmounts, 866 MHz, 1 GB RAM each. If I used
> > these, I would put 1 Digium card in each and organize them into two
> > groups of 5 Asterisk servers.
> >
> > For #2, which would be better/easier, a or b?
> >
> > I would appreciate any insights anyone may be able to provide.
> >
> > Mitch Thompson
> >
> > --
> > "Nothing is more destructive of respect for the government
> > and the law of the land than passing laws which cannot be
> > enforced." —Albert Einstein
> >
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