Telenetics 14.4, 2.4, 28.8 T5 Deny RDL Requests, T6 Initiate Remote Digital Loopback See Figure

&T5 DENY RDL REQUESTS

The modem will not respond to a remote digital loopback request from a distant modem. This will result in an error if the command is given while any V.54 test is active (&T1, &T3, &T6, &T7 or &T8).

&T6 INITIATE REMOTE DIGITAL LOOPBACK (See Figure 4)

The command is valid only if the modem is in the command state with a connection established.

Configure the modem under test with an AT&T4 command so that it will honor a remote digital loopback request.

Enter AT&T6 at the local modem and it will send a remote digital loopback request to the remote modem. After the RDL acknowledgement signal is received from the remote modem, DSR is turned off (if &S1 is in effect), the on-line state is entered, a CONNECT result code is sent to the DTE, and the test timer is set to the value in S18.

If the local modem does not receive the RDL acknowledgment signal from the remote end in three seconds, it sends an ERROR result code to the DTE and returns to the command state. The local modem sends the signal to release the remote digital loopback when the test is terminated.

The test may be terminated by the H0, Z, or &T0 command. The test will also terminate when the test timer expires (sending the modem to the command state) or carrier is lost (causing a NO CARRIER result code and the modem to go on hook in the command state).

RESULT CODE	DESCRIPTION
CONNECT	When on-line state is entered.
ERROR	If any V.54 test is active (&T1, &T3,
	&T6-&T8).
ERROR	If not in on-line command state.
ERROR	If the RDL signal is not acknowledged.
&T7 INITIATE RDL WITH LOCAL SELF TEST (See Figure 5)
MIU Installation, Operation & Diagnostics Edition: January 25, 1999		Page 21