🚀 go-pugleaf

Regarding disadvantages for MNP.  I have had two problems with an MNP
equipped modem (Vadic 2400 PA).  The first is that it will NOT talk to
Vadic 3467 modem unless I disable the MNP negotiation.  I suspect this
may relate somehow to the VA3400 protocol that the 3467 supports but
never pinned down the exact cause.

The second problem is the time required for the MNP negotiation.  By the
time the MNP modem has decided that the other modem does not have MNP
and informed me of the fact, I have usually missed the prompt sent by
the other system.  Perhaps the real problem here is all that verbose
output.  There should be some way to turn it off.  My UUCP software
doesn't really care whether MNP was used on a particular connection.

Are these problems common to other implementations of MNP?

The main reason I got the Vadic 2400 PA is that it supports speed
conversion.  This makes the baudrate supported by the answering modem
transparent to me,  greatly simplifying automated connections.