Raymar Telenetics MIU14.4L, User Manual

Page: 33 / 43

0049-0867-01X 2
nd
Generation MIU14.4L – USER’S GUIDE 6/22/2011
Rev. A Page 29 of 39
&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.