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Operation Manual V.34 - Modems, Version 07/97
AT
Chapter 3
3.3.1 Test Loops
AT&T(n) Test Loops
The command AT&T comes with different independent groups of settings.
The settings for the different groups have to be typed consecutively. The
commands AT&T0 and AT&T1 are processed immediately. With the
command AT&T? you can display the current setting and other possible
adjustments. At an active loop the LED A/O, ANS or LB flash up constantly.
command parameter/default description
AT&T(n) 0,1, 4...6, 17...20 / test loops
6, 17, 20
0
terminate local loop initiated with
AT&T1
1 initiate local loop
4 accept local loop (PS2)
5 reject local loop (PS2)
6 accept local loop (PS2), the loop is
terminated automatically after 5 mins.
17 accept local loop and local request
for remote loop
18 ignore local loop and local request
for remote loop
19 local loop breaks existing connection
and initiates local loop
20 local loop is only accepted if no
connection is established
AT Commands