Lenovo ThinkPad T420 User Manual page 71

Table 3. Modem command list (continued)
\N
\N \N Operating Mode
&F
&F &F Set to Factory Defined
Configuration
&T &T &T Local Analog Loopback
Test
\N<mode>
\N \N
&F &F &F
&T[<value>]
&T &T
<mode>
0: Selects normal speed
buffered mode (disables
error-correction mode)
and forces &Q6 (selects
asynchronous operation in
normal mode.)
1: Same as 0.
2: Selects reliable (error
correction) mode and forces
&Q5 (the modem will try to
negotiate an error corrected
link). The modem will first
attempt a LAPM connection and
then MNP connection. Failure
to make a reliable connection
results in the modem hanging
up.
3: Selects auto reliable mode
and forces &Q5 (the modem
will try to negotiate an error
corrected link). This operates
the same as \N2 except failure
to make a reliable connection
results in the modem falling back
to the speed buffered normal
mode.
4: Select LAPM error-correction
mode and forces &Q5 (the
modem will try to negotiate an
error corrected link). Failure to
make an LAPM error-correction
connection result in the modem
hanging up.
5: Selects MNP error-correction
mode and forces &Q5 (the
modem will try to negotiate an
error corrected link). Failure to
make an MNP error-correction
connection results in the modem
hanging up.
<value>
0: Terminates test in progress.
1: Initiates local analog
loopback, V54 Loop 3. If a
connection exists when this
command is issued, the modem
hangs up. The CONNECT XXXX
message is displayed up the
start of the test.
.
Chapter 2 Using your computer
53