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From: ken@tyd1.tydfam.iijnet.or.jp (ken)
Subject: Re: ISDN and FreeBSD
Sender: usenet@tydfam.iijnet.or.jp (TYD0 mail server)
Nntp-Posting-Host: tyd1.tydfam.iijnet.or.jp
Organization: Takeshi Yamada Family Net
Message-ID: <KEN.95Oct4210332@tyd1.tydfam.iijnet.or.jp>
References: <44k7pi$mt3@agate.berkeley.edu>
In-Reply-To: Luigi Semenzato's message of 30 Sep 1995 20:02:58 GMT
Date: Wed, 4 Oct 1995 12:03:32 GMT
Lines: 31
In article <44k7pi$mt3@agate.berkeley.edu>
Luigi Semenzato <luigi@cs.berkeley.edu> writes:
> Is anybody connecting their FreeBSD box to the world using ISDN?
> If you use an external ISDN modem, can the serial driver keep
> up with ISDN speed?
> Are there drivers for internal ISDN modems?
> How does a single ISDN B line (56Kb) compare with a compressed
> 28.8Kb modem? (A compression factor of 2 is not unreasonable
> on uncompressed data).
>
> Thank you ---Luigi
I am connecting to 64Kbps ISDN service using FreeBSD2.1.0-STABLE
in Japan.
My async. modem can keep about 3.8Kbyte/sec transfer rate, close to
theoritical, but with sync mode - my modem transform sync to async and
requires 115.7kbps, it does not perform that good. DTE 57.6kbps perform
best at 4.7Kbytes/sec transfer rate.
16550 is not enough for keeping up DTE high enough to 115.7kbps.
My machine is P5@100Mhz. Intel Premium MB w/ 32MBDRAM.
ken@tydfam.iijnet.or.jp
PED00213@niftyserve.or.jp
Takeshi "Ken" Yamada