Answering question number 5 only: My customer's system is an extremely busy IVR, used in a game-show call-in environment, with short calls and high peak call rates. The maximum number of ports so far that my system can handle, with a single fast P4 processor, is 4 E1 spans (one E400P). Even at this size of 120 channels, I experience some dropped calls and channel lock-outs (which recover every few minutes). However, there are three pieces of good news that should improve the situation:
(1) There apparently is a bug is how the code buffers the frames on the E1 ports - an overflow causes many re-tries and possibly lost calls (in my experience). Mark and Martin at Digium are aware of the problem, and are currently looking into it. I will let you know what they find. (2) I've had good luck so far using a dual-Xeon processor board and Redhat's Fedora Linux. I have an IVR load-tester and the results are very encouraging. In a couple weeks I'll have results from the field. (3) Digium's TE410P has the ability to be a bus-master. This produces some minor performance gains in my tests. When all three of these things are incorporated into an environment, I think you could probably expect that the dual-Xeon setup could handle as many as 8 or more E1 spans in a heavy load IVR environment. Please let me know if you need my load tester script, as I'm happy to share it. Good luck! Scott Scott M. Stingel Emerging Voice Technology Inc. Email: [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> URL: www.evtmedia.com <http://www.evtmedia.com> > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Ahmad Faiz > Sent: Thursday, December 04, 2003 9:29 PM > To: [EMAIL PROTECTED] > Subject: [Asterisk-Users] Operating environment for * > > > Hi all, > > I've got some questions to post in regard to running asterisk in a > production-grade environment, specifically targeting high-density IVR > applications. No VoIP involved, just straight PSTN -> * and > perhaps the > occasional outdials or agent-based predictive dialing. > > 1) Which user would you run * under? > 2) What other security-related issues do you have to resolve? > 3) How do you handle crashes (murphy -will- visit you some day)? > 4) What are the best redundancy techniques to use? > 5) With respect to Digium's E1 card, what's the max # of > boards you've been > able to install in a single box and still have * work well? > > Thanks in advance. Perhaps someone could start a site where users can > contribute war stories of their * deployment -- that would > make for good > reading! > > Cheers, > Faiz > > > _______________________________________________ > Asterisk-Users mailing list > [EMAIL PROTECTED] > http://lists.digium.com/mailman/listinfo/asterisk-users > > _______________________________________________ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users
