Epson ESC/VP21 User Manual page 62

Fax/data modem

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Here, the test timer is disabled and the modem sets up an internal analog loop as

shown in Figure 4-1. When the loopback is established, the modem goes on-line

and the test message (any character you type) is looped back on the screen for verifi-

cation. Finally, +++ returns the modem to the command state and &T0 ends the

test and breaks the internal analog loop.

The following command sequence is the same as the previous one except that the

test timer is set to 60 seconds. At the end of the test time, the timer expires, the

test ends, and the test result is reported.

Example 2 - Test timer enabled

Command:

Result:

Test message:

Escape:

4 - TESTING

AT/N1<CR>

ATS18=60&T1 <CR>

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