For multiple TE4XXP cards you strap them with <a href="http://www.digium.com/en/wheretobuy/digiumdirect/productview.php?product_code=ACCTIM01">http://www.digium.com/en/wheretobuy/digiumdirect/productview.php?product_code=ACCTIM01
</a><br>to prevent corruption due to timing slips on the second, third or fourth TE4XXP card.
<br>
<br>The link above shows four cards linked.<br><br>We tested up to three quad PRI cards in a Dual Xeons and comfortably run 2 in a system.<br><br>You can just get Asterisk to generate the calls and on the inbound systems play music on hold or something.
<br><br>Regards<br>Rob<br><br><div><span class="gmail_quote">On 08/09/06, <b class="gmail_sendername">Koen Van Impe</b> <<a href="mailto:koenvi@gmail.com">koenvi@gmail.com</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div><div>Sounds like a nice setup you have in mind.</div>
<div>All I can tell is that you might have trouble with clocking on your PRI's if you use multiple cards in one system.</div>
<div>I've read about it somewhere, but can't find the source. Have a look at the wiki.</div>
<div>Syncing clocks on one card happens on the card level. But of you have multiple cards, there might be some slip.<br> </div>
<div>Good luck!<br> </div></div><div><span class="e" id="q_10d8c0e78ebfc3fe_1">
<div><span class="gmail_quote">On 9/7/06, <b class="gmail_sendername">Mitch Thompson</b> <<a href="mailto:mitchthompson@satx.rr.com" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">mitchthompson@satx.rr.com
</a>> wrote:</span>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0px 0px 0px 0.8ex; padding-left: 1ex;">Hello, All.<br><br>I've been lurking on this list for some time, trying to drink from the<br>
fire hose. Now, I have a few questions. First, though, here is the
<br>background:<br><br>I work for a testing facility where we test telephony products. We have<br>been using Asterisk for about 4 months now as a test bed for various<br>things. Now, our test engineers want to ramp things up a bit.
<br><br>Essentially, the system under test has the capability of using up to 8<br>T-1 ISDN/PRI lines. The engineers want to build two Asterisk "clusters",<br>each with 20 ISDN/PRIs. Of these, 12 would be "Inbound" PRIs, and the
<br>other 8 would be "Outbound". The system under test would be connected to<br>8 of the Inbound lines, and a Call generator, such as an Ameritec<br>Crescendo, would be connected to the other 4 Inbounds. These twelve
<br>lines would dial through the Asterisk, through the 8 Outbound lines to<br>the other Asterisk, which would terminate the 8 PRIs into 12 PRIs worth<br>of Crescendo or Fortissimo.<br><br>The whole purpose of this mess is to determine how the system under test
<br>responds to network congestion, since it is competing with the Crescendo<br>for the 8 Outbound PRIs.<br><br>So, I guess my questions are:<br><br>1) Is Asterisk's congestion capabilities robust enough to do what we want?
<br>2) I have the resources to build this cluster one of two ways:<br>a) I have 4 Dell PowerEdge SC1600's, with 3.0 GHz Dual Xeons (looks like<br>4 processors to the system), 2 GB of RAM, and 6 slots (2xPCI, 2X PCI-X,<br>
2X PCI-Express). I would use these and put 5 Digium cards in each for<br>the two Asterisk clusters.<br>b) I also have 12 1U rackmounts, 866 MHz, 1 GB RAM each. If I used<br>these, I would put 1 Digium card in each and organize them into two
<br>groups of 5 Asterisk servers.<br><br>For #2, which would be better/easier, a or b?<br><br>I would appreciate any insights anyone may be able to provide.<br><br>Mitch Thompson<br><br>--<br>"Nothing is more destructive of respect for the government
<br>and the law of the land than passing laws which cannot be<br>enforced." —Albert Einstein<br><br>_______________________________________________<br>--Bandwidth and Colocation provided by <a href="http://Easynews.com" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">
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