-=> /* Quoting Fane to All */ <=-
 Fa> Is there a way to speed up the Kermit protocol so it
 Fa> uses at least half the capability of a 28.8 kbps
 Fa> modem?
Not really.  The problem is that Kermit relies on an ACK
after every transmitted block (around 128Kb or so).
Protocols like Zmodem are "streaming" protocols and require
no ACK(nowledgment) from the receiving modem UNLESS there
is an error.  Requiring an ACK after every transmitted
block brings the modem "switching latency" into the
equation.  Switching latency is the minimum amount of time
required for the modem to switch into receive mode and back
to transmit mode.  This modem latency (switching time)
produces so much overhead that it really eats up your
throughput.  That's why most of the world had moved away
from protocols that require an ACK after every packet
(Xmodem does too).
-Frank
(fsexton@ibm.net - http://www.concentric.net/~fsexton)
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