Path: utzoo!utgpu!water!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!cs.utexas.edu!natinst!bigtex!james From: james@bigtex.uucp (James Van Artsdalen) Newsgroups: comp.sys.ibm.pc Subject: Re: ISDN Message-ID: <6108@bigtex.uucp> Date: 13 Aug 88 22:39:09 GMT References: <18.23040D6B@rubbs1.FIDONET.ORG> Reply-To: james@bigtex.UUCP (James Van Artsdalen) Organization: F.B.N. Software, Austin TX Lines: 19 In article <18.23040D6B@rubbs1.FIDONET.ORG>, Mark.Medici@rubbs1.FIDONET.ORG (Mark Medici) wrote: > My understanding is that you won't need a modem with ISDN, that it > will accept digital signals. I also beleive that there will be an > interface to allow non-ISDN data equipment to be used on ISDN lines, > but you might need a similar setup at both ends. I would tend to suspect that high speed modems like the Trailblazer+ wouldn't easily survive the analog->digital->analog transition. Even if they did, you still have to have a black box for your PC: Mess-DOS rolls over dead at the thought of 9600bps (interrupt latency on extended memory on slow machines), much less 8Kbytes/sec! I rather expect the problem is worse on OS/2 (for different reasons). Even using an NS16550A serial chip with the 16 byte FIFO isn't going to cut the interrupt rate enough, not that the Mess-DOS file system is currently good for sustained 8K/sec anyway. -- James R. Van Artsdalen ...!uunet!utastro!bigtex!james "Live Free or Die" Home: 512-346-2444 Work: 328-0282; 110 Wild Basin Rd. Ste #230, Austin TX 78746