Black Box 3600 MODEM 用户手册
Test Mode Operation
7-2
Modem 3600
Note
These tests do not apply to fax mode and should only be
performed when the modem is configured for data operation.
These tests do not apply to fax mode and should only be
performed when the modem is configured for data operation.
LDL, RDL, and RDL/TP tests are initiated after making an online data
connection in normal or direct mode only. LAL and LAL/TP are
initiated while in offline command mode. These tests can be initiated by
connection in normal or direct mode only. LAL and LAL/TP are
initiated while in offline command mode. These tests can be initiated by
AT
commands or by using the LCD front panel SELECT TEST menus.
Refer to Table 7-2.
Note
Bold text indicates command parameter defaults.
Bold text indicates command parameter defaults.
Terminating a Test in Progress &T
Tests can be terminated manually or automatically. The &T command
terminates a test manually. The modem automatically goes to command
mode during LDL, LAL/TP, and RDL/TP tests. Enter the &T command
to terminate the tests. For LAL and RDL, enter the escape sequence
(+++) before the &T command to go to the command mode.
terminates a test manually. The modem automatically goes to command
mode during LDL, LAL/TP, and RDL/TP tests. Enter the &T command
to terminate the tests. For LAL and RDL, enter the escape sequence
(+++) before the &T command to go to the command mode.
By preloading register S18 with 1 to 255, each test mode automatically
times out after the specified number of seconds and exits back to the
command mode. Loading S18 with 0 disables the auto timeout feature
and the test will run continuously until manually terminated.
times out after the specified number of seconds and exits back to the
command mode. Loading S18 with 0 disables the auto timeout feature
and the test will run continuously until manually terminated.
Table 7-2. Test Commands
Command
Operation
&T
Terminate any test
&T1
Initiate local analog loopback test
&T3
Initiate local digital loopback test
&T4
Grant remote requested digital loopback
&T5
Deny remote requested digital loopback
&T6
Initiate remote digital loopback test
&T7
Initiate remote digital loopback with test pattern
&T8
Initiate local analog loopback test with test pattern
%T
Transmit test pattern