pdj@nbires.UUCP (Paul D. Jensen) (01/22/85)
I think some of the problems with spurious { characters on 1200 baud
modems are unrelated to phone lines. I have had considerable problems
with my older Cermetek modem which they have been unable to correct.
If I put the modem in analog looparound, and leave my terminal on all night,
I receive a small number (1-10) of the spurious phase decoding errors
(usually Del {). Since there is no phone line involved, the error rate
appears much too large for this type of logic, and about as bad
as many phone lines (about 1 in 10**7). The three replacements I had
varied by a factor of 10 in the error rates, but all showed errors.
Thus is appears that problems may exist in the clock recovery for
the phase decoding.
--
Paul Jensen
NBI
(303) 444-5710 x3054