Device Test Procedure - Paradyne Comsphere 3510 User Manual

Device Test Procedures
Follow the procedure in Table 3-2 for a Device Test.
The DTE and network cables are not required to be
connected to the DSU to do this test. However, the DSU
must be powered.
Your Action
1. Press the LL test switch.
2. Press the TP test switch.
3. Press the TP test switch.
4. Press the LL test switch.
*
During this test, TXD, LSD, and RXD DTE interface indicators monitor internal versions of the
corresponding interface lead.
3510-A2-GN32-70
Device Test Results
If, at the conclusion of the Device Test, the PASS
indicator is lit, then the DSU has passed the test and has a
very high probability of not being the source of trouble. If
the FAIL indicator is lit, the DSU has failed the Device
Test and should be replaced.
Table 3-2

Device Test Procedure

Local DSU Front Panel Response
LL indicator lights. TEST flashes for 6 seconds and then remains
ON.
TP indicator lights. TXD and RXD indicators flash.
detected, the FAIL indicator flashes or remains ON. After about
30 seconds, the TEST finishes and PASS or FAIL appears. TXD
and RXD continue to flash.
TP indicator goes Off. TXD and RXD indicators now show
interface lead status.
LL indicator goes Off. TEST flashes for about 6 seconds, then
goes off.
July 1999
Operation
*
If errors are
3-7