Synchronous serial Re: E-Mail Formats RE: Future of cctalk/cctech

Chuck Guzis cclist at
Thu Jun 18 14:07:58 CDT 2020

On 6/18/20 11:55 AM, Ethan Dicks via cctalk wrote:

> We used to run our sync serial stuff between 9600 and 56kbps, both our
> own Bisync products, and DDCMP over interfaces like the one that's
> part of the DMF32.  We had customers in Europe running our products at
> 64kbps with no problems, and we did have one modem eliminator clocked
> at 115kbps for testing, which is the max speed for V.24, IIRC.
> 56kbps should be safe for the devices you are describing, but it might
> go a little faster.

My recollection of the Bell 209 is that it supported a low-speed reverse
channel in addition to the FDX primary.   Did any DEC equipment ever
take advantage of that?


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