> EH> 2. With your array of commands, can you select a LAP-M connection with
 > EH> MNP5 compression - if not, for what reason?
 > MNP5 is MNP4 with dumb compression.  MNP5's not divisable so
 > as to provide a seperate compression only method

Which part of V.42 allows MNP5 to be disabled above LAP-M connections? By
your own reckoning, the error control and data compression mechanisms are
independently selectable and inter-compatible.

 > EH> Curiously of course, V.42 recommendation does not *imply* any support
 > EH> for compression,
 > V42bis was accepted as the primary means of data compression
 > in January 1990 by the then CCITT

Did you mis-read my original sentence? V.42 recommendation does not imply
*any* support for compression. If compression is implemented then it *may*
be negotiated using V.42.

V.42bis is a data compression protocol, but its implementation is not a
requirement of (and it isn't *implied* by) V.42. It is simply one of the
protocols which V.42 can negotiate, if it (V.42bis) is implemented.

Edward

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