HDB and \"e\" protocol

[lauren at RAND-UNIX.arpa]

Actually, the higher speeds reported with the ethernet and direct
X.25 connection protocols in X.25/ethernet environments 
is not so much a result of the "error-free" end-to-end (computer-to-computer)
connection but the result of the end-to-end hardware flow control that must
be present on such circuits. 

The combination of X.25 and/or ethernet environments, full end-to-end
error correction AND hardware-based end-to-end flow control allows for
running the connection at higher speeds than would otherwise be possible
in the X.25 and ethernet environments, but error-correction alone is 
not the only factor--flow control is critical.

--Lauren--