Paradyne COMSPHERE 3610, Operator'S Manual

Page: 96 / 310

COMSPHERE 3600 Series Data Service Units
4-16 July 1999 3610-A2-GB91-90
Results
After selecting either Selective or Subn, the test is
terminated and the DCP displays the message Command
Complete.
Device Test
The Device (Devic) Test uses a test pattern generator
built into the DSU. The generator sends a test message to
the DSU transmitter, where it is looped back to the DSU’s
receiver (Figure 4-3). The receiver passes the incoming
test message to the comparator, which checks the received
message for errors. During the test, the TXD, RXD, and
RTS indicators show internal activity, which may be
different from the states of the same leads at the DTE
interface.
NOTE
On power-up, the DSU
determines whether a DBM is
installed. It then initiates a Device
Test on itself and the DBM. The
results of the Device Test appear
momentarily on the DCP’s LCD.
To access the Device Test from the top-level menu,
make the following selections:
•
Local (F1), or Remot (F2) and Address
•
Test
•
DSU
•
Devic
For a DSU, the Device Test is a session-disruptive,
15- or 20-second automatic test of the functionality of the
DSU. It does not require any connection except ac power
to the DSU.
Results
The following is displayed for the DSU:
F1
Device: DSU
Pass
F2 F3
If a network loopback was in effect when a power-up
Device Test was initiated, the test will not run and the
second line will display Abrt.
If the DSU fails the test, the second line displays Fail.
Also, the Alarm (Alrm) status indicator lights, and the
failure is written to the DSU’s Health and Status report.
The Alarm indicator remains lit and the failure appears in
the DSU’s Health and Status report until the initiation of a
Device test ends with Pass. Until then, you can proceed
but you must be aware that the DSU may not function
properly.
Figure 4-3. Device Test