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6.3 TEST MODES
The Model 1082/I and Model 1082/144/I has a built-in proprietary loop-
back test mode, plus a built-in V.52 BER test pattern generator, for evalu-
ating the condition of the modems and the communication link. These
tests can be activated physically from the front panel, or via the interface.
Remote Digital Loopback (RDL)/V.52 (BER)
The Remote Digital Loopback (RDL) test checks the performance of both
the local and remote Model 1082s, and the communication link between
them. Any characters sent to the remote Model 1082 in this test mode
will be returned back to the originating device (see Figure 7, below). For
example, characters typed on the keyboard of the local terminal will
appear on the local terminal screen after having been passed to the
remote Model 1082 and looped back.
Figure 12.
Remote digital loop
Table 2:
LED configurations
LOCAL
REMOTE
10Base-T
DSL
Status
NS
ER
TM
10Base-T
DSL
Status
NS
ER
TM
Power ON
G*
off
F
on
off
off
G*
off
F
O
N
off
off
DSL Link
G*
G
F
off
off
off
G*
off
F
off
off
off
Link Brk
G*
off
F
off
off
off
G*
off
F
off
off
off
Brk+ 10s
G*
off
F
ON
off
off
G*
off
F
O
N
off
off
RDL
G*
G
F
off
off
ON
G*
off
F
off
off
ON
RDL+511
G*
off
F
off
off
ON
G*
off
F
off
off
ON
With DTE Connected
With DTE Connected
Mark
G*
G
F
off
off
off
G*
G
F
off
off
off
Space
G*
G
F
off
off
off
G*
G
F
off
off
off
Data
G*
G
F
off
off
off
G*
G
F
off
off
off
G=GREEN
O=ORANGE
ON= ON
off= OFF
Brk+10s = 10 Seconds following Link Break
G*=Green if a valid 10Base-T connection is detected.
F=Flashing
Link Brk = DSL Link Broken
RDL initiated
Remote 1082
Local 1082