[comp.dcom.modems] V.22 modems

WTHOMPSON@RCCA.BBN.COM (William Thompson) (10/14/87)

    Many V.22bis modems in the U.S. employ Bell 212A and 103 fallback
    signalling schemes.  Could someone recommend a vendor that employs
    V.22 signalling as the fallback for 1200 bps?

    Thanks,

    Bill Thompson
    WTHOMPSON@BBN.COM

hildum@iris.ucdavis.edu (Eric Hildum) (10/15/87)

Hello,

The Digital Equipment Corporation DF224 (Scholar) modem supports V22A
(1200) and V22B (600) as well as V22 BIS (2400).  The documentation
that I have indicates that the modem will fallback to 1200 b/s from
the V22 BIS mode; however, as the documentation I have is preliminary,
I cannot say whether the fallback protocol can be switched between V22A 
or Bell 212. When my modem has fallen back, I think it has gone to Bell 
212 - though I cannot be certain.


				Eric Hildum