[net.periphs] How do you get Racal-Vadic VA3451 and DEC DF112 modems talking at 1200?

ado@elsie.UUCP (Arthur David Olson) (08/08/85)

At our end there's an Autodial Racal-Vadic VA3451 modem operating at 1200 baud
At the other end there's a Digital Equipment Corporation DF112 modem operating
at 1200 baud.  Howmsoever, there ISN'T communication between the two.
(Communication DOES occur when we use a Bell System Data Set 212A at this end.)

If this problem is familiar to you, and you know the solution, I'd appreciate
hearing from you.
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larry@kitty.UUCP (Larry Lippman) (08/11/85)

> At our end there's an Autodial Racal-Vadic VA3451 modem operating at 1200 baud
> At the other end there's a Digital Equipment Corporation DF112 modem operating
> at 1200 baud.  Howmsoever, there ISN'T communication between the two.
> Communication DOES occur when we use a Bell System Data Set 212A at this end.
> 
> If this problem is familiar to you, and you know the solution, I'd appreciate
> hearing from you.

	I am assuming you are running async.  Sounds like your VA3451 wants to
stay in VA3400-mode.  Check your hardware options to make certain that auto
identification of 212A mode is permitted.  Also, check your character length,
since the VA3451 will permit 8, 9, 10, and 11 bit lengths in high-speed mode,
but 212A modems only work with 9 and 10 bit character lengths.  10 bits is the
default setting on most 212A's.

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