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The operator of the remote system now types a sequence of characters.
You do not see any characters on your display while your modem echoes
the characters typed by the operator of the remote modem back to the
remote computer. The test continues for the time set with register S18. If
you do not use register S18, the operator of the remote modem must hang
up or call you on another telephone line to tell you when the test is over.
To manually end the test, enter command state and type: AT&T0
<Enter>. To end the test and hang up, type: ATH <Enter>.
6.6.7
Respond to Remote Digital Loopback
The Respond to Remote Digital Loopback command configures your
modem to accept a request from a remote modem to engage in a Remote
Digital Loopback or a Remote Digital Loopback with Self-Test. To
configure the modem to accept a remote digital loopback request, at the
command prompt type: AT&T4 <Enter>.
To configure the modem to ignore a remote digital loopback request, type:
AT&T5 <Enter>.
6.6.8
Automatically Terminating a Test: Register S18
To configure the modem to terminate a test automatically after a specified
time, change the value of register S18. Register S18 determines the
duration of a diagnostic test. The factory default setting is 0 seconds,
which disables the timer and causes tests to continue indefinitely until you
cancel them. You can set this register to terminate tests after 1 to 255
seconds.
CSMIM-T1 Hardware Installation Guide
Diagnostics
6-19
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