On Thu 06 Mar at 17:45 Peter Harle (3:713/709{at}FidoNet) wrote to Bill Grimsley:

 PH>      Appears you've had some bad experiences with Netcomm ? 
 PH> I have too, upgrading some of their earlier 1200 to 2400 baud 
 PH> Smart/Auto/Modems, but we had several E7F and M7F (14k) they seemed to 
 PH> work well, hence the purchase of several M34F's, they also seem to work 
 PH> well.

The Series 3 M7F had BTLZ data compression implemented over MNP 4 error
correction, and did not support LAPM error correction.

Besides other Netcomms, only Microcom and Motorola 326X series (and
Telebit?) modems are known to support BTLZ data compression over MNP 4.
Other modems supporting BTLZ only over LAPM error correction had problems
with Netcomm Series 3 M7F modems, given that Netcomm had claimed support
for (then) CCITT V.42bis (BTLZ over LAPM), requiring Series 3 M7F modems in
Fidonet not to show the "V42b" flag.

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