Aucbvax.6647
fa.info-terms
utzoo!decvax!ucbvax!info-terms
Thu Apr  8 20:56:42 1982
VADIC 3400 series modem
>From RAM@MIT-MC Thu Apr  8 20:54:32 1982
Is it any surprise that 3400 series modems seem to be speed
transparent UP TO 1200 baud. More precisely, when I establish
connection to my unix at 1200 baud, then tell terminal and
unix that we are now 300 baud, everything goes at 300 baud.

I had fond hopes that some of the attendant noise on phoneline
would have its severity reduced by lowering speed. But this
alas, seemed not to happen: subjectively, the garbaging on the
screen seems about the same percentage, but when  I shortly
thereafter connect at 300 baud on a Bell 103 acoustic coupler,
I have less problem. Is the VADIC signalling scheme
inherently more noise susceptible independent of speed?
(By the way, I switch in the noise supression equalization
as per VADIC documentation, and result is same). 

Modem at far end is VADIC triple, if that matters.


--bob morris