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Path: euryale.cc.adfa.oz.au!newshost.anu.edu.au!harbinger.cc.monash.edu.au!hobyah.cc.uq.oz.au!bunyip.cc.uq.oz.au!munnari.OZ.AU!spool.mu.edu!usenet.eel.ufl.edu!news.mathworks.com!fu-berlin.de!zrz.TU-Berlin.DE!loch.in-brb.de!bluesprings.in-brb.de!bluesprings.in-brb.de!not-for-mail From: nuggets@bluesprings.in-brb.de (Lars Hentschke) Newsgroups: comp.unix.bsd.freebsd.misc Subject: Re: ISDN Date: 3 Apr 1996 06:31:29 GMT Organization: Brandenburg Individual Network e.V. Lines: 35 Message-ID: <4jt601$gmd@bluesprings.in-brb.de> References: <4ivo5k$jq3@sundog.tiac.net> <315AFE74.41C67EA6@FreeBSD.org> <peter.828238209@jhome.DIALix.COM> <4jois1$97m@bluesprings.in-brb.de> <Dp7JHo.n7.0.raindrop.seaslug.org@raindrop.seaslug.org> NNTP-Posting-Host: bluesprings.in-brb.de X-Newsreader: TIN [UNIX 1.3 950824BETA PL0] Thomas Unger (unger@raindrop.seaslug.org) wrote: : I could get a faster serial card. That would allow me to pick up the : extra bandwith and maybe reduce the number of interupts. Running ppp : on a 28.8 modem over a serial port at 57600 the interupts come often : and I think I'm noticing a drag on the system. Hopefully a serial : card with a larger buffer could solve that problem. But how does the : serial card know when to interupt? It can't always wait till the : buffer is full. Maybe some kind of timeout, could be quite short. : But probably won't be as good as a custom board. Sound like a non-FIFO card. A normal FIFO (16550) has 16 bytes for buffering. Some 460kbps-cards has 32 Bytes for FIFO (16660), but FreeBSD does not support this. I' have 2 Zyxel (only one channel per Zyxel) with 230400 and 2 USRobotics Sportster 28.8 with 115200. All on a normal FIFO and on a 486/100, which spools some news, do some nfs-serving and some www-caching, system idles 75% on heavy line-activity and i get 7.2-7.4kB/s over one ISDN-channel (gzipped-tar-file). But i have 64kbps-ISDN-lines in Germany. : more reasonable. But then, don't I need some sort of adapter to get : two voice lines out of the ISDN service? Do some ISDN modems have : that while other's don't? You get a voice with - an ISDN-telefone. - an old telefone behind an a/b-adapter - an old telefone behind an ISDN-Modem (Zyxel or new USR) If there any channels free, you can use them for combining with any of the above. For instance: using a voice-line over a Zyxel simultaniously with an ISDN-connection to your Inernet Provider over the same Zyxel. Lars.