Path: utzoo!utgpu!water!watmath!clyde!rutgers!mit-eddie!bloom-beacon!gatech!hao!oddjob!gargoyle!ddsw1!karl From: karl@ddsw1.UUCP (Karl Denninger) Newsgroups: comp.dcom.modems Subject: Re: 'Blazers and slow response Summary: Not the newer models! Message-ID: <715@ddsw1.UUCP> Date: 9 Feb 88 21:12:54 GMT References: <188@mccc.UUCP> <510@hscfvax.harvard.edu> Reply-To: karl@ddsw1.UUCP (Karl Denninger) Distribution: na Organization: Macro Computer Solutions, Inc., Mundelein, IL Lines: 43 In article <510@hscfvax.harvard.edu> pavlov@hscfvax.harvard.edu (G.Pavlov) writes: >In article <188@mccc.UUCP>, pjh@mccc.UUCP (Peter J. Holsberg) writes: >> I have a Telebit TRailblazer on my 3B2/400 and one on my XT clone. >> Whenever, I call the 3b2 from the XT, I experience a strange phenomenum: >> I can type faster than the 'blazers echo the characters to my screen. > As has been pointed out before, the Trailblazer is not a true "full-duplex" > modem.... How old is your Trailblazer? More specifically, what revision firmware is in it (at *both* ends)? We received two of the new ones recently (BA4.00 proms) and there is nearly *no* turnaround delay I can see. I use these things interactive all the time -- beats the heck out of a 2400 baud connection! On hitting a key via the TB, there is a barely noticable pause before the character echos back. Note that I'm going out via 'cu' and 'xcomm', which incur delays of their own in processing the characters -- my comparison is with a local line on a real terminal *directly* into the CPU. Our units exhibit no more delay than you would expect if the data were flowing at 2400 baud with regards to interactive echoback (realistically, I doubt it's even 100 ms... it really is *barely* noticable). By the time your finger leaves the key the character has echoed. Of course, when you get a nice full page of output, it's so much faster that there's no reasonable comparison to be made. We do talk to an older model for our newsfeed (Rev BA3.??), and it has a more noticable turn-around time. Our units also seem to have a problem once in a while with that rev of the TB+ -- occasionally it will retrain several times during a call, then give up and disconnect. This is not consistent, and may be just a broken modem on the other end (it doesn't occur with any of the other TB+ modems we talk to, and we talk with several). If you're not current on the firmware, have Telebit update the thing (I would presume this is just a PROM change, right?) ------ Karl Denninger | Data: +1 312 566-8912 Macro Computer Solutions, Inc. | Voice: +1 312 566-8910 ...ihnp4!ddsw1!karl | "Quality solutions for work or play"