Telenetics MIU2.4 manual T8 Local Loopback with Self Test See Figure, T6, &T7, or if on-line

&T8 LOCAL LOOPBACK WITH SELF TEST (See Figure 6)

The modem should be on hook. Enter AT&T8 to configure the modem for analog loopback and self test. The test timer is started at the time indicated by S18, DSR is turned off (if &S1 is in effect). A self test condition is entered, and an OK result code is sent to the DTE. During the test the modem sends a test message and counts errors in the looped back signal. The test is terminated when the timer times out (S18) or the &T0, H0, or Z command is issued. When the test is terminated, the three digit error count is sent to the DTE. An OK result code follows the error count.

RESULT CODE	DESCRIPTION
OK	If a test state is entered.
OK	After error count is sent to DTE
ERROR	If any other V.54 test is active (&T1, &T3,
	&T6, &T7), or if on-line.

MIU Installation, Operation & Diagnostics Edition: March 30, 1998 Page 23