Test Mode 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 AT commands or by using the LCD front panel SELECT TEST menus. Refer to Table 7-2.

Note

Bold text indicates command parameter defaults.

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

 

 

Terminating a Test in Progress — Q&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.

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.

For example, to run the self test analog loopback test for 30 seconds, enter

ATS18=30&T8

The modem should respond with 000 after 30 seconds.

7-2

V.3600

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Motorola V.3600 manual Terminating a Test in Progress Q&T, Grant remote requested digital loopback