RAD Data comm ASMI-450 - Manual (Page 95)

Diagnostics
ASMi-450 Installation and Operation Manual 5-7
LOOP REM REM PORT
When the remote user's port loopback is activated, the user's port interface of
the remote ASMi-450 returns the received data signal toward the local user's
DTE. The remote loopback is performed by internally connecting the DCE
receive signal, to the input of the transmit path. The received data signal
remains connected to the remote user's DTE. The test signal is provided by the
local user's DTE, that must receive its own transmission without errors while the
loopback is activated.
Figure 5-2 shows a typical remote user's port loopback.
This test fully checks the data link, including the cables connecting the two
ASMi-450 to the HDSL line, the transmission plant connecting the two
ASMi-450, and the cable connecting the local user's DTE to the local
ASMi-450.
Figure 5-B. LOOP REM REM PORT Loopback
TEST OPTIONS
Operating
Instructions Before starting the execution of a test, note that in general you should activate
only one loopback at a time.
To activate or deactivate a specific test, use the following procedure:
Step Action Key Display
1 Bring the cursor under the left-hand field in
the top row (if not already there)
CURSOR
2 Scroll to display TEST OPTIONS in the top
row
SCROLL The right-hand field of the top row should
show OFF, to indicate that no test is active.
LOOPS indicates that a test is currently
active (in this case, the front-panel TST
indicator lights).
Second row is empty
3 To enable the activation of tests, bring the
cursor under the right-hand field in the top
row, and scroll to display LOOPS
CURSOR,
SCROLL
The second row displays the first test option
REMOTE ASMi-450 LOCAL ASMi-450
User
Interface
Processing
HDSL Line
Interface
HDSL Line
HDSL Line
Interface
Processing
User
Interface