I'm running 2 Sangoma A104D cards and a Sangoma A102D card for a total of 10 PRIs. Right now I have 9 PRIs configured as 3 DAHDI groups. 3 PRIs are in a group for local calls, 2 are grouped for long distance, and the last 4 connect to our Toshiba PBX for users still on digital phones.
These cards are in a Dell R710 with two quad core CPU's. System load hovers just below 1 with 30-40 concurrent calls. Half the calls are to SIP phones connected over OpenVPN running on the server. The other half are DAHDI to DAHDI bridged to the PBX. Software wise I am running CentOS 5.4 x86_64, Asterisk 1.6.1.18, DAHDI 2.2.1, libPRI 1.4.10.2, and Sangoma wanpipe driver 3.5.6. I had some issues with newer wanpipe drivers and kernel soft locks. I also had a PCI dma timeout issue which required a Sangoma firmware update. Since then it has been rock solid since with 22 days of uptime. Ryan On Wed, Mar 24, 2010 at 9:53 PM, Zeeshan Zakaria <[email protected]> wrote: > In theory asterisk can handle 8 spans, which means 192 concurrent calls if > all spans are T1. In reality after 6 spans it starts giving problems. > > I recently shipped a server to a client in Taiwan, and before shipment it > was put under a load of 100 plus concurrent calls (zap channels) for two > whole weeks without any break. It had 6 spans, Rhino T1, FXO and FXS cards > all with on board EC. The server's processors combined were hardly 7% in use > and no call quality issues. For the same client another server with 9 spans > were causing asterisk to freeze once there are more than 96 calls, i.e. it > going to 1st span of the second T1 card, which made it 9th span considering > FXO and FXS spans, but server load remained low as usual. > > So I think it is not your T1 card but some software/driver issue. Did you > upgrade anything recently on this server? > > -- > Zeeshan A Zakaria > > On 2010-03-24 8:49 PM, "James Lamanna" <[email protected]> wrote: > > Hi, > Does anyone have any good empirical data suggesting what the maximum > number of PRI calls (incoming and outgoing) > without hardware echo cancellation can be handled on a single box is? > I have a TE410P T1 (1st gen) card and I'm seeing interesting errors of > D-Channels going down and then coming back up (See below). > > I've looked at the number of simultaneous calls at each of these > points, and each time the span seems to > have around 21-23 calls, and the total number of calls ranges between 47 and > 53. > I'm trying to figure out if this is a load issue or an issue on the > provider side, though my provider says they > do not see any errors on any of the T1s. > Could this be some sort of hardware interrupt problem? If so, how can I > check? > > The specs of the machine are, Dual Xeon 2.80Ghz (both single core but w/HT) > 4GB memory. > Running asterisk 1.4.26.3 (32-bit) > with libpri-1.4.7 and zaptel-1.4.12.9 > > Thanks. > > -- James > > Please CC me on responses. > > > [Mar 22 09:45:00] VERBOSE[8887] logger.c: == Primary D-Channel on span 2 > down > [Mar 22 09:45:00] WARNING[8887] chan_dahdi.c: No D-channels available! > Using Primary channel 48 as D-channel anyway! > [Mar 22 09:45:00] VERBOSE[8887] logger.c: == Primary D-Channel on span 2 > up > [Mar 22 09:59:23] VERBOSE[8886] logger.c: == Primary D-Channel on span 1 > down > [Mar 22 09:59:23] WARNING[8886] chan_dahdi.c: No D-channels available! > Using Primary channel 24 as D-channel anyway! > [Mar 22 09:59:23] VERBOSE[8886] logger.c: == Primary D-Channel on span 1 > up > [Mar 22 09:59:23] VERBOSE[8886] logger.c: == Primary D-Channel on span 1 > down > [Mar 22 09:59:23] WARNING[8886] chan_dahdi.c: No D-channels available! > Using Primary channel 24 as D-channel anyway! > [Mar 22 09:59:23] VERBOSE[8886] logger.c: == Primary D-Channel on span 1 > up > [Mar 22 10:36:11] VERBOSE[8886] logger.c: == Primary D-Channel on span 1 > down > [Mar 22 10:36:11] WARNING[8886] chan_dahdi.c: No D-channels available! > Using Primary channel 24 as D-channel anyway! > [Mar 22 10:36:11] VERBOSE[8886] logger.c: == Primary D-Channel on span 1 > up > [Mar 22 10:36:11] VERBOSE[8886] logger.c: == Primary D-Channel on span 1 > down > [Mar 22 10:36:11] WARNING[8886] chan_dahdi.c: No D-channels available! > Using Primary channel 24 as D-channel anyway! > [Mar 22 10:36:11] VERBOSE[8886] logger.c: == Primary D-Channel on span 1 > up > [Mar 22 10:44:36] NOTICE[8888] chan_dahdi.c: PRI got event: HDLC Bad > FCS (8) on Primary D-channel of span 3 > [Mar 22 10:45:44] NOTICE[8886] chan_dahdi.c: PRI got event: HDLC Bad > FCS (8) on Primary D-channel of span 1 > [Mar 22 10:59:33] NOTICE[8887] chan_dahdi.c: PRI got event: HDLC Abort > (6) on Primary D-channel of span 2 > [Mar 22 11:30:53] VERBOSE[8886] logger.c: == Primary D-Channel on span 1 > down > [Mar 22 11:30:53] WARNING[8886] chan_dahdi.c: No D-channels available! > Using Primary channel 24 as D-channel anyway! > [Mar 22 11:30:53] VERBOSE[8886] logger.c: == Primary D-Channel on span 1 > up > [Mar 22 15:34:28] VERBOSE[8887] logger.c: == Primary D-Channel on span 2 > down > [Mar 22 15:34:28] WARNING[8887] chan_dahdi.c: No D-channels available! > Using Primary channel 48 as D-channel anyway! > [Mar 22 15:34:28] VERBOSE[8887] logger.c: == Primary D-Channel on span 2 > up > > -- > _____________________________________________________________________ > -- Bandwidth and Colocation Provided by http://www.api-digital.com -- > New to Asterisk? 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