3Com 56k User's Manual And Reference page 52

En Sets local echo
E0 Echo OFF
E1 Modem displays keyboard
commands
Fn Sets online local echo of
transmitted data ON/OFF
F0 Local echo ON; modem sends
a copy of data, it sends to the
remote system to your screen
F1 Local echo OFF; receiving
system may send a remote echo
of data it receives
Hn Controls ON/OFF hook
H0 Hangs up (goes on hook)
H1 Goes off hook
48
Technical Reference
In
Ln
Mn
Displays the following
information:
I0 Four-digit product code
I1 Results of ROM checksum
I2 Results of RAM checksum
I3 Product type
I4 Current modem settings
I5 Stored memory settings
I6 Link diagnostics
I7 Product configuration
I9 Plug and Play information
I11 Extended link diagnostics
Speaker Volume
L0 Lowest Speaker Volume L1
Low Speaker Volume
L2 Medium Speaker volume
L3 High Speaker Volume
Operates speaker
M0 Speaker always OFF
M1 Speaker ON until CONNECT
M2 Speaker always ON